BLOG
Evidence over hype.
Writing on supplements, performance nutrition, and the research behind what actually works — by Nelson Marques, RD, CSSD.
October 1, 2026
Phosphatidylserine: The 300 mg Studied Dose vs the 100 mg Label Dose, and the Soy-vs-Sunflower Source Question
Phosphatidylserine is one of the better-documented cognitive and cortisol-blunting supplements on the market, but almost every retail PS product on the shelf delivers one-third of the dose used in the trials that built its reputation. Here is the dose math, the soy-vs-sunflower source question, and the four-question label read that separates a studied dose from a decorative one.
#phosphatidylserine#cognitive-support#cortisol#supplement-research#label-claims#underdosingSeptember 29, 2026
Digestive Enzyme Blends: The DU/HUT/SKB Unit Nightmare, Why the Milligram Number on the Label Is Not the Dose, and the 4 Enzyme Activity Units Every Honest Label Should Declare
Digestive enzyme supplements are one of the least label-transparent categories on the retail supplement shelf, and the reason is a units problem that most consumers do not know exists. Enzymes are functional molecules — a milligram of enzyme powder tells you nothing about how much substrate the enzyme can break down. That work is measured in activity units, and every enzyme has its own unit system: DU for amylase, HUT for protease, LU or FIP for lipase, CU for cellulase, ALU for lactase, GalU for alpha-galactosidase, and a dozen others. Reputable enzyme manufacturers disclose the activity unit on the Supplement Facts panel next to the milligram weight. Underspecified consumer products declare the milligram weight only, or bury the enzymes inside a proprietary blend so no per-enzyme dose is visible at all. Here is why the milligram number on the label is not the enzyme dose, what each activity unit actually measures, the 4 units every honest digestive enzyme label should declare, the FCC vs. USP unit conversion trap that lets two products with 'identical' labels deliver 10x different actual activity, and the 20-second Supplement Facts read that separates a functionally dosed enzyme product from a pixie-dusted category-filler.
#digestive-enzymes#amylase#protease#lipase#lactase#labels#transparency#supplement-scienceSeptember 22, 2026
Vitamin E on the Label: The d-alpha vs. dl-alpha Bioactivity Gap, the 'Mixed Tocopherols' Distinction the Cheap Formulas Compress, and the 20-Second Supplement Facts Read That Separates a Real Vitamin E From a Synthetic-Isomer Placebo Made From Petroleum Feedstock
Vitamin E is not one molecule. It is a family of eight fat-soluble compounds — four tocopherols and four tocotrienols, each in an alpha, beta, gamma, or delta form. The retail multivitamin shelf compresses that family into a single 'Vitamin E' line item that hides two questions that decide whether the capsule does anything: is the alpha-tocopherol on the label the natural d-alpha form (RRR-alpha-tocopherol) from vegetable oil distillates, or the synthetic dl-alpha form (all-rac-alpha-tocopherol) manufactured from petroleum-derived trimethylhydroquinone with only 12.5 percent RRR isomer content — and are the gamma, beta, and delta tocopherols and the four tocotrienols present at all, or has the formula quietly reduced Vitamin E to alpha-tocopherol alone. The USP unit convention obscures both questions. The 'Vitamin E (as dl-alpha-tocopheryl acetate)' bullet on 90 percent of budget multivitamins is roughly half as bioactive as the same IU of natural d-alpha and delivers none of the gamma-tocopherol activity that the higher-quality trials use. This post walks the tocopherol family chemistry, the 2 to 1 RRR-vs-all-rac bioactivity ratio the USP updated in 2000 but the marketing did not, the mixed-tocopherols distinction the cheap formulas compress, the tocotrienol side of the family the standard-of-care Vitamin E products entirely ignore, the ester form question (acetate vs succinate vs plain tocopherol), and the 20-second Supplement Facts read that separates a serious Vitamin E product from a synthetic-isomer placebo.
#vitamin-e#tocopherols#tocotrienols#labels#isomers#underdose#transparencySeptember 17, 2026
Boron on the Label: The 3-to-10 mg Studied Range, the 150 mcg Multivitamin Default That Is 20 to 70x Below It, and the Bone-Density, Vitamin-D-Metabolism, and Testosterone-Estradiol Ratio Trial Data the Trace-Mineral Shelf Compresses Into a Sub-Milligram Pixie Dust
Boron is one of the most consistently underdosed ingredients on the trace-mineral shelf. The Nielsen 1987 postmenopausal-bone-loss trial that put boron on the supplement map used 3 mg/day. The Naghii testosterone and estradiol trials used 6 to 10 mg/day. Modern joint-and-bone-support and vitamin-D-metabolism trials use 3 to 6 mg/day. The multivitamin on the shelf declares 150 mcg (0.15 mg) — 20 to 70x below every one of those studied ranges. There is no meaningful clinical trial evidence for 150 mcg of boron doing anything. This post walks what boron actually does in the body, the 3-to-10 mg trial data the multivitamin bullet compresses into a sub-milligram pixie dust, the 20 mg/day tolerable upper limit that leaves a huge safe window between the multivitamin dose and any toxicity concern, the form question (citrate vs glycinate vs aspartate vs fructoborate) that matters less than the dose gap, and the 20-second Supplement Facts read that separates a serious boron product from a marketing-grade trace mineral.
#boron#trace-minerals#labels#dosing#bone-health#underdose#transparencySeptember 15, 2026
Milk Thistle on the Label: Silymarin vs. Silibinin Standardization, the 80 Percent Standardization Trick That Hides an Unknown Isomer Mix, and the Bioavailability Formulations That Matter More Than the Milligram Count on the Front of the Bottle
Milk thistle sits in almost every liver-support formula on the shelf, and the front-of-label story is remarkably consistent — 250 mg, 500 mg, sometimes 1000 mg per capsule, 'standardized to 80 percent silymarin.' The Supplement Facts panel math tells a different story. Silymarin is not one molecule — it is a complex of six to seven flavonolignans (silibinin A and B, silicristin, silidianin, isosilibinin A and B, silimonin) with meaningfully different pharmacokinetics and hepatoprotective potencies, and silibinin (specifically silibinin A + B, the diastereoisomer pair) is the active-fraction subset the human trials are anchored on. An 80 percent silymarin standardization tells the buyer almost nothing about how much silibinin the capsule actually delivers. This post walks the silymarin-vs-silibinin distinction, the standardization ambiguity that lets 80 percent claims cover 15 to 45 percent silibinin content, the poor 5 to 10 percent oral bioavailability of raw silymarin extracts, the phytosome and Legalon-branded silybin-phosphatidylcholine complex that changes the pharmacokinetics 5 to 10-fold, and the 20-second Supplement Facts read that separates a serious hepatoprotective product from a marketing-grade milk-thistle capsule.
#milk-thistle#silymarin#silibinin#labels#standardization#bioavailability#transparencySeptember 10, 2026
Krill Oil vs. Fish Oil on the Label: The EPA + DHA per Gram Math That Reverses the Price Story, the Phospholipid-vs-Triglyceride Bioavailability Question That Marketing Overstates, and the Serving-Size Trick That Hides How Many Softgels a 2 g/Day Dose Actually Costs
Krill oil and fish oil sit side by side on the omega-3 shelf at price points that suggest krill oil is the premium product. On the front-of-label story, that framing has some support — phospholipid-bound omega-3s, a natural astaxanthin content, sustainability marketing, and a cleaner burp profile. On the per-gram-of-EPA-plus-DHA math, the framing reverses cleanly: a typical krill-oil softgel delivers 60-100 mg of EPA + DHA against 300-1000 mg from a typical fish-oil softgel, at 3-8x the price per gram of active omega-3. The 2 g/day EPA + DHA dose that most of the cardiovascular and triglyceride literature is anchored to requires roughly 4-6 large krill-oil softgels or 20-30 small ones per day against 2-3 concentrated fish-oil softgels — and the monthly cost of that dose from krill oil frequently runs 5-15x the fish-oil cost for the same milligrams of the active molecule. The phospholipid-bioavailability advantage is real in the plasma-incorporation literature at matched dose, but at the retail-shelf reality it is a 10-30 percent efficiency advantage on a product that costs 500-1500 percent more per gram of active. This post is the krill-vs-fish-oil label-literacy read: what each product actually delivers on the Supplement Facts panel, the serving-size trick that hides the softgels-per-day count for the studied dose, the bioavailability question the marketing overstates, the astaxanthin-and-sustainability claims worth taking seriously and the ones worth taking with skepticism, and the 20-second Supplement Facts read that shows which product is priced honestly against its active ingredient.
#omega-3#krill-oil#fish-oil#labels#dosing#transparency#supplement-scienceSeptember 8, 2026
Biotin Megadoses Break Your Blood Work: The 5,000 mcg Label That Fakes Heart Attacks and Hides Thyroid Disease
Pick up almost any hair-skin-nails or B-complex supplement off the shelf and it will list biotin at 5,000 mcg or 10,000 mcg per serving — 16,667% to 33,333% of the RDA of 30 mcg. That is not a supportive dose. It is a lab-interference dose. Biotin at these concentrations distorts the streptavidin-biotin immunoassays that most clinical labs use to measure thyroid hormones, cardiac troponin, PSA, vitamin D, and a long list of other panels. The clinical picture is documented, published, and unambiguous: falsely low TSH and falsely high free T4 mimicking hyperthyroidism, falsely low troponin masking real heart attacks, and a series of case reports of unnecessary emergency-department workups and one FDA-reported death traced to biotin-distorted troponin. The industry landed on 5,000-10,000 mcg because the megadoses look impressive on the label and no research supports doses above 30-100 mcg for the marketed hair-and-nails claim. Here is the biology of how biotin breaks the assay, the specific tests it distorts, the dose thresholds that reach interference, and the label-and-timing discipline that keeps biotin out of your bloodwork.
#biotin#labels#dosing#transparency#lab-interferenceSeptember 3, 2026
Whey Concentrate vs. Whey Isolate on the Label: The Protein-Percentage Math the Serving Size Hides, the Cost-per-Gram-of-Actual-Protein Read That Reorders the Shelf, and Why the 'Premium' Blend Bag Is Frequently a Concentrate-First Product Priced Like an Isolate
Whey concentrate and whey isolate are the two most common protein forms on the supplement shelf, and the label distinction between them is the single most important thing a protein-supplement buyer can learn to read. The two forms are produced by the same starting material (liquid whey, the byproduct of cheese manufacturing) put through progressively more aggressive filtration. Whey concentrate is 30 to 80 percent protein by dry weight depending on how aggressively the fat and lactose have been filtered out. Whey isolate is 90 percent or higher protein by dry weight and functionally lactose-free at the serving level. The label rarely names the protein-percentage number directly. Instead, the buyer has to compute it from the Supplement Facts panel — dividing grams of protein per serving by grams of serving size — and only then can compare cost per gram of actual protein across products. This post is the whey-protein label-literacy read: the manufacturing steps that separate the four grades (WPC 34, WPC 80, WPI, hydrolysate), the protein-percentage math the serving size hides on multi-ingredient bags, why the 'whey protein blend' bag that leads with concentrate and adds a token isolate is priced like an isolate but performs like a concentrate on the per-gram-of-actual-protein calculation, the leucine-content question that matters for the muscle-protein-synthesis response, the specific label patterns that separate a transparent product from a marketing product, and the 20-second Supplement Facts read that reorders the shelf when the label is doing its job and outs the product when it is not.
#whey-protein#concentrate#isolate#labels#dosing#transparency#supplement-scienceSeptember 1, 2026
NR vs. NMN: The NAD+ Precursor Label Question, the 250-to-500 mg Studied-Dose Bracket, and Why the 100 mg Retail Default Is a Pixie-Dust Position on the Most Expensive Ingredient on the Shelf
Nicotinamide riboside (NR) and nicotinamide mononucleotide (NMN) are the two NAD+ precursor supplements that ate the anti-aging supplement conversation over the last five years. Both work as intracellular NAD+ raisers in the salvage pathway. Both have real human data supporting plasma-NAD+ elevation at the studied doses. Both are among the most expensive ingredients per gram in the entire supplement category — which is exactly why the retail industry has landed on 100 to 250 mg per serving as the price-friendly default while the clinical trials that produced almost every marketing claim used 300 to 1,000 mg per day. Here is what actually separates NR from NMN in the pharmacokinetic and transporter literature, why the debate over which is 'better' is mostly a marketing story stacked on top of two real questions the label can answer, the specific dose brackets the human trials used and the retail underdose position that maps to a fraction of the studied plasma-NAD+ response, the FDA regulatory status question that quietly reshuffled the NMN market in 2022 and is still reshaping shelf presence, and the 20-second Supplement Facts read that tells you whether the bottle in your hand is a studied-dose product or a price-competitive pixie-dust position on the most-expensive-ingredient shelf.
#nr#nmn#nad-precursors#dosing#labels#transparency#supplement-scienceAugust 27, 2026
Astaxanthin: Why 12 mg Is the Studied Dose and Why the 4 mg Retail Standard Underdoses the Skin Photoprotection, Anti-Inflammatory, and Eye-Fatigue Benefits the Marketing Claims Rest On
Astaxanthin is one of the more evidence-supported carotenoids in the supplement market — real skin photoprotection data from randomized trials, real eye-fatigue reduction data, real anti-inflammatory data from oxidative-stress and lipid-peroxidation endpoints. Almost all of the benefit claims rest on trials dosed at 12 mg per day. Almost all of the retail products are dosed at 4 mg per day. The 3-fold underdose is not a rounding issue — it is the difference between the marketing claim replicating the clinical study and delivering something that reads as intended but performs at a fraction. Here is what actually separates the astaxanthin dose-response from the retail underdose norm, why the 12 mg trials replicate and the 4 mg trials mostly do not, the difference between Haematococcus pluvialis-sourced natural astaxanthin and synthetic astaxanthin (why the natural form actually matters for once), and the 20-second Supplement Facts read that tells you whether the bottle in your hand delivers a studied dose or a marketing-illusion dose.
#astaxanthin#carotenoids#dose#standardization#labels#transparency#photoprotectionAugust 25, 2026
Iodine Forms and the Narrow Upper Limit: Why Potassium Iodide, Kelp, and SSKI Are Not Interchangeable and How the 1100 mcg UL Sits Just Seven Servings Above the RDA
Iodine is one of the few essential nutrients where you can move from deficiency, through sufficiency, into thyroid-driving toxicity with a single misjudged supplement stack — and where the label on a supplement bottle typically tells you less than any other essential nutrient about what dose you are actually taking. Kelp powder varies 10-fold in iodine content within a single bottle. 'Thyroid support' formulas routinely stack potassium iodide plus kelp plus tyrosine into totals that cross the 1100 mcg Tolerable Upper Intake Level in a single serving. And the SSKI (saturated solution of potassium iodide) products sold for radiation emergency use deliver 50 mg per drop — 300 times the RDA — sitting on the same wellness-supplement shelves as 150 mcg maintenance products. Here is what actually separates the iodine forms, why iodized salt was a mid-century public-health triumph that has been quietly undone in the Whole Foods era, and the 20-second Supplement Facts read that tells you whether the product in your hand belongs in your stack at any dose.
#iodine#forms#standardization#labels#transparency#upper-limit#thyroidAugust 20, 2026
Selenium Forms and the Narrow Upper Limit: Why Selenomethionine, Sodium Selenite, and Selenium-Enriched Yeast Are Not Interchangeable, and How the 400 mcg UL Sits Just Four Servings Above the RDA
Selenium is one of the few essential nutrients where the Recommended Dietary Allowance and the Tolerable Upper Intake Level sit close enough that a single generic 'high-potency multivitamin plus a thyroid-support formula plus a Brazil nut habit' stack can cross the toxicity threshold in a healthy adult without anyone in the chain knowing. The 55 mcg RDA against the 400 mcg UL is one of the narrowest safety windows in the essential-nutrient set — a 7x ratio compared to zinc's 4x, magnesium's 12x, or vitamin C's 25x — and the industry response to that narrow window has been almost entirely silence at the label level. Add to that the form question — selenomethionine vs sodium selenite vs sodium selenate vs selenium-enriched yeast vs methylselenocysteine — where different chemistry produces different absorption, different tissue distribution, and different long-term-storage behavior. Here is what actually separates the forms, why the SELECT trial 2011 vitamin-E-plus-selenium prostate-cancer signal reset the conversation on selenium supplementation in Americans who were already selenium-sufficient, and the 20-second Supplement Facts read that tells you whether the product in your hand belongs in your stack at all.
#selenium#forms#standardization#labels#transparency#upper-limit#toxicityAugust 18, 2026
Boswellia AKBA Standardization: Why '65% Boswellic Acids' Is Not the Number That Matters, and How the Real Active Fraction Gets Hidden Under a Total-Acid Label Claim
Pick up three Boswellia serrata bottles at any supplement retailer. The first says 'Boswellia Extract 500 mg, standardized to 65% boswellic acids.' The second says 'Boswellia 400 mg (standardized 40% AKBA).' The third says 'Boswellia Complex 300 mg — proprietary Boswellia extract with turmeric and ginger.' The three products have almost nothing in common in how they will actually behave in the body, and none of the three labels tells the buyer what the active fraction dose is unless you know the fraction question to ask. Boswellic acids are not one molecule — they are a family of six pentacyclic triterpenoids of which one, acetyl-11-keto-beta-boswellic acid (AKBA), is doing most of the anti-inflammatory work in the trial literature, and it is the fraction the plant produces LEAST of. Here is the AKBA math the '65% boswellic acids' claim skips, the reason a 65% total-acid extract can contain almost no AKBA, the standardization patterns that separate a functional Boswellia product from a marketing product, and the 20-second Supplement Facts read that answers the question the front of the label refuses to.
#boswellia#AKBA#standardization#labels#transparency#anti-inflammatory#extractsAugust 13, 2026
B6 Is Not One Molecule Either: Pyridoxine vs P5P, the Neuropathy Signal at High-Dose Pyridoxine, and What the Supplement-Facts Panel Should Say
Pull three B6 supplements off the shelf. The first says 'Vitamin B6 (as pyridoxine HCl) 100 mg.' The second says 'Vitamin B6 (as pyridoxal 5'-phosphate) 25 mg.' The third — a B-complex — says 'Vitamin B6 50 mg' and does not name the form at all. B6 is a family of six related compounds, of which only pyridoxal 5'-phosphate (P5P) is the coenzyme form that actually catalyzes the roughly 150 enzymatic reactions B6 participates in. Pyridoxine has to be converted through two enzymatic steps to become P5P. And at doses above a few hundred milligrams per day, sustained oral pyridoxine has produced sensory peripheral neuropathy in case series and clinical reports going back to the 1980s. Here is the form-and-dose read on B6: what the six vitamers are and which one your enzymes actually use, why 'B6 100 mg' on the label is a dose most healthy adults do not need and a dose that carries a real neuropathy signal at chronic use, what P5P offers and what it does not, the conversion-defect edge cases where P5P is actually indicated, and the Supplement-Facts patterns that separate a serious B6 product from a mass-market bottle that is dosing four to eight times what the diet delivers.
#vitamin b6#pyridoxine#p5p#neuropathy#labels#transparency#dosingAugust 11, 2026
B12 Is Not One Molecule: Methylcobalamin vs Cyanocobalamin vs Hydroxocobalamin vs Adenosylcobalamin, and Why 'Active B12' on the Label Is Only Half the Story
Pull four B12 supplements off the same shelf. The first says 'Vitamin B12 (as cyanocobalamin) 1,000 mcg.' The second says 'Methylcobalamin (Active B12) 5,000 mcg.' The third says 'B12 Complex — methylcobalamin + adenosylcobalamin 2,500 mcg.' The fourth — a specialty product — says 'Hydroxocobalamin 1,000 mcg.' None of the labels tells the buyer whether the form in the bottle matches the person taking it. The four cobalamins have different absorption, different intracellular conversion requirements, different retention profiles, and different relevance depending on whether the buyer is a healthy adult supplementing prophylactically, an older adult with reduced intrinsic-factor secretion, a strict plant-based eater dependent on supplementation, or a symptomatic patient in a low-B12 workup. The 'active B12' marketing frame collapses the form question into a single label claim. Here is the form-and-conversion math, the intrinsic-factor absorption ceiling that caps oral doses, the passive-diffusion window that lets megadoses partially bypass that ceiling, the sublingual-versus-oral question that the trial literature has mostly answered, and the label patterns that separate a serious B12 product from a marketing product.
#vitamin b12#methylcobalamin#cyanocobalamin#hydroxocobalamin#labels#transparency#dosingAugust 6, 2026
MCT Oil Is Three Different Products: C8 vs C10 vs Blends and the Chain-Length Math the Label Hides
The label says "1000 mg MCT oil" and the container says "MCT Oil" and you assume the two servings do the same thing. They do not. MCT is a category name for four different fatty acids — C6, C8, C10, C12 — each with a different absorption pathway, a different ketone-generation curve, and a different GI tolerance profile. A "pure MCT oil" that is 60% C12 (lauric acid) and 30% C10 is nutritionally closer to coconut oil than to the ketogenic-diet C8 product it is sold next to. This post is the chain-length breakdown, the ketone-response numbers for each fatty acid, the label patterns that hide the composition, the GI-tolerance math that separates a 15g dose you tolerate from a 15g dose that puts you in the bathroom, and the 20-second Supplement-Facts label read that tells you which of the three MCT products you are actually looking at.
#mct#medium-chain-triglycerides#labels#supplement-science#ketonesAugust 4, 2026
Resveratrol Is Almost Impossible to Absorb: The Bioavailability Disaster Nobody Talks About
The 500 mg or 1000 mg of "resveratrol" on the front of the bottle is one of the most misleading numbers in the entire supplement aisle. Oral resveratrol is almost completely metabolized on first pass through the gut wall and liver into sulfate and glucuronide conjugates within an hour, and the plasma concentration of free, unmodified resveratrol — the molecule the SIRT1 and antioxidant literature actually studied — barely rises above the low nanomolar range at any oral dose humans have tolerated. Here is what the pharmacokinetic literature actually shows about oral resveratrol, why the label dose is not the delivered dose, what the alternative forms (micronized, liposomal, SR-formulated, trans-resveratrol standardized, japanese knotweed source, polydatin, pterostilbene) actually do to the numbers, and how to decide whether the supplement is worth taking at all.
#resveratrol#bioavailability#labels#supplement-science#polyphenolsJuly 30, 2026
Green Tea Extract: Why the EGCG Number on the Label Decides Both Whether It Works and Whether It's Safe
The 500 mg or 1000 mg of "green tea extract" on the front of the bottle is not the dose that matters. What matters is the milligrams of EGCG — epigallocatechin gallate — inside that extract, which can be anywhere from 45 mg to 400 mg per capsule depending on the standardization. And the same EGCG number that determines whether the product does anything is also the number that determines whether it puts your liver at risk. Trial-dose EGCG in the fasted state has produced case reports of acute liver injury in otherwise healthy adults, and the label rarely tells you which side of that curve you are on. Here is how to read the green-tea-extract line so the milligrams you take match the milligrams in the trial and stay under the milligrams that hurt people.
#green-tea-extract#egcg#standardization#labels#hepatotoxicity#supplement-scienceJuly 28, 2026
L-Carnitine Forms: Acetyl vs. Tartrate vs. Fumarate — Why the Same Milligram Number Means Three Different Doses
The 1000 mg on your L-carnitine label is not 1000 mg of L-carnitine. It is a bonded salt or ester whose L-carnitine base fraction is anywhere from 58% to 68%. And that is before the form question — acetyl-L-carnitine crosses the blood-brain barrier and does something in the brain; L-carnitine L-tartrate stays peripheral and hits muscle recovery; L-carnitine fumarate is the cardiovascular-study form. Same three letters on the label, three different molecules, three different labels' worth of dose math nobody does. Here is how to read the L-carnitine line on your bottle so the number in your body matches the number in the trial you are trying to reproduce.
#l-carnitine#forms#dosing#labels#supplement-scienceJuly 23, 2026
Probiotic CFU: Guaranteed at Expiration, Not at Manufacture — The Number on the Front Label That Almost Never Reaches You
The 50-billion CFU number on the front of the probiotic bottle is the potency at the moment the pill left the factory. By the time you swallow it, it may be a fraction of that. Here is why the difference exists, why brands hide the timing, and the single line on the label that separates a real dose from a decaying one.
#probiotics#labels#transparency#supplement-science#dosingJuly 21, 2026
HMB Underdoses: Why 1 Gram Is Marketing and 3 Grams Is the Actual Dose
Every clinical trial that showed HMB doing anything used 3 g/day. Every retail HMB product on the front shelf uses 1 g or 1.5 g. The gap is not a rounding error — it is a marketing decision, and it is why most people who try HMB feel nothing and quit. Here is the dose math, the compound the studies actually used, and how to spot a real HMB serving on the label.
#hmb#dosing#labels#muscle#supplement-scienceJuly 14, 2026
BCAAs Alone Are a Marketing Move: Leucine Triggers Muscle Protein Synthesis, but You Cannot Build Muscle From Three Amino Acids
BCAA powders sell hundreds of millions of dollars a year on the claim that leucine, isoleucine, and valine drive muscle protein synthesis. The claim is half-true and the marketing is worse than the underlying supplement. Leucine does trigger MPS through the mTOR pathway — but you cannot build muscle out of three amino acids, and every gram of new tissue requires all nine essentials in the right ratios. A 10 g BCAA scoop taken between meals in a fed athlete adds nothing measurable that a small serving of whey or a chicken breast at dinner did not already do; the same 10 g of EAAs, or 25 g of whey isolate, provides the leucine trigger AND the full amino-acid substrate MPS needs to actually complete. Here is what BCAAs mechanistically do and do not do, what the EAA-vs-BCAA-vs-whey head-to-head trials actually show, the three narrow populations for whom BCAAs might still fit, the label pattern that separates a real EAA product from a BCAA in disguise, and why most BCAA products are $40 for a scoop of leucine you already ate at dinner.
#BCAA#EAA#amino-acids#leucine#protein-synthesis#dosing#labels#marketing-critiqueJuly 9, 2026
Alpha-Lipoic Acid: R-ALA vs S-ALA and Why a Racemic Bottle Wastes Half the Dose
Almost every alpha-lipoic acid capsule on the shelf lists a single number on the front — 300 mg, 600 mg, 1,200 mg — and tells you nothing about which isomer you are actually paying for. ALA exists as two mirror-image molecules: R-ALA, the biologically active form that occurs naturally in mitochondria and drives every trial signal in the literature, and S-ALA, the synthetic byproduct of chemical synthesis that is inactive at best and possibly antagonistic at worst. A standard 'ALA' bottle is a racemic 50/50 mix, which means that a 600 mg label is functionally a 300 mg R-ALA dose paired with 300 mg of a companion molecule doing nothing useful. Here is what the isomer chemistry is actually doing, why sodium R-lipoate solved the stability problem that killed early R-only bottles, what the trial dose is for the indications ALA actually has evidence in, and how to read a label so you are not paying twice for half a dose.
#alpha-lipoic-acid#ALA#isomers#chirality#dosing#labels#supplement-scienceJuly 7, 2026
Taurine: 1 g Does Nothing, and the Research Dose Starts at 3 g
Almost every taurine capsule on the market ships at 500 mg or 1,000 mg and treats a single-capsule serving as an implicit target. It is not. 500 mg is a rounding error against endogenous synthesis, 1 g is below the threshold of most trials that have found a signal, and the modern research on cardiovascular support, endurance-exercise performance, aging biomarkers, and blood-pressure runs at 3 to 6 g per day. Here is what the trial dose actually looks like, why the energy-drink 'taurine' label is a marketing shape rather than a functional dose, why NAC and glycine are neighboring conversations, and how to read a taurine bottle without paying twice for the same 1 g.
#taurine#amino-acids#cardiovascular#endurance#dosing#labels#supplement-scienceJuly 2, 2026
NAC: 600 mg Is the Floor, Not the Target
Almost every N-acetylcysteine bottle on the market ships in 600 mg capsules and lets you assume that number is the effective dose. It is not — 600 mg is the historical mucolytic starting point, and the modern research on glutathione support, liver load, mood, and PCOS runs at 1,200 to 2,400 mg per day. Here is what the trial-validated NAC dose actually is, why the sulfur smell tells you the form is intact, why glycine belongs in the same conversation, and how to read an NAC label without paying twice for the same 600 mg twice a day.
#nac#n-acetylcysteine#glutathione#dosing#labels#supplement-scienceJune 30, 2026
Folate Is Not Folic Acid: Methylfolate, Folinic Acid, and Why the 400 mcg DFE on Your Multivitamin Label Is Probably the Wrong Form for the People Who Need It Most
Pick up four multivitamins off the same shelf. The first lists 'folic acid, 400 mcg DFE.' The second lists 'folate, 400 mcg DFE (as L-methylfolate).' The third lists 'folate complex, 800 mcg DFE' with no form disclosed. The fourth — a prenatal — lists 'folic acid 800 mcg DFE.' None of the four labels gives the buyer enough information to know whether the form in the bottle is the right form for the person taking it. Folate is not folic acid. Methylfolate is not folate. Folinic acid is not methylfolate. The four forms have different absorption, different conversion requirements, different dose-response curves, and different relevance depending on whether the buyer carries one of the common MTHFR polymorphisms, is pregnancy-trying, is on a folate-interfering medication, or is in the B12-masking-risk window. The DFE convention on the label collapses all of this into one number. Here is the form-and-conversion math, the MTHFR question (overstated for the general population, real for the subset where the form choice matters), the 1 mg masking issue most labels do not warn about, and the label patterns that separate a real folate product from a folic-acid product wearing a marketing label.
#folate#methylfolate#MTHFR#multivitamin#labels#transparency#dosingJune 25, 2026
Inositol Is Not One Ingredient: Myo vs D-Chiro, the 40:1 Ratio Most Labels Get Wrong, and the 4 g Dose-Response Curve
Walk down the supplement aisle and pick up three bottles labeled 'inositol.' One says '500 mg inositol' with no form specified. One says 'inositol blend, myo and d-chiro, 600 mg.' One says 'myo-inositol 2,000 mg' on the front and adds 'with d-chiro inositol' in the supplement-facts box at an unspecified dose. None of the three is at the trial-validated dose-response signal for the conditions the inositol literature actually supports. The well-trialed protocol for insulin sensitivity, PCOS, and metabolic-syndrome endpoints is 4 g per day of myo-inositol combined with 100 mg per day of d-chiro-inositol — a 40:1 ratio that approximates the body's natural intracellular distribution. Most retail products run 10-30% of the myo dose, the wrong ratio (often 1:1 or worse), and underdose the d-chiro at therapeutic-irrelevant amounts. Here is the dose-response math, the 40:1 ratio physiology, the form-and-label patterns that separate a real product from the inositol-blend marketing posture, and the use cases where the protocol has signal and the ones where it does not.
#inositol#PCOS#insulin sensitivity#dosing#labels#transparencyJune 23, 2026
Melatonin Is a 0.3 mg Supplement, Not a 10 mg One: The Dose-Response Curve the Industry Walked Past
Pick up a bottle of melatonin off the shelf and it almost always says 3 mg, 5 mg, or 10 mg. The dose that the original human-trial work showed produces a clean physiologic sleep signal — restoring nighttime melatonin to the levels a healthy 20-year-old produces endogenously — is around 0.3 mg. The 5-10 mg dose the market settled on raises plasma melatonin to 10-40x physiologic concentrations, persists into the next morning, blunts core-temperature regulation, produces next-day grogginess, and over time produces a measurable downregulation of melatonin receptor sensitivity. The industry standardized on the wrong end of the dose-response curve because more milligrams looked like more product. Here is the dose-response math, the supraphysiologic-overshoot problem, the trial doses that actually moved sleep onset and quality, and the label-and-form patterns that distinguish a physiologic-dose product from the 10 mg gummies that dominate the aisle.
#melatonin#sleep#dosing#labels#transparencyJune 18, 2026
Vitamin K2 MK-4 vs MK-7: Why the Form and the Dose on the Label Are Both Doing Less Than You Think
Most vitamin K2 products on the shelf are 100 mcg of MK-7 stamped on a label and called a day. The two main forms of K2 — MK-4 and MK-7 — have wildly different doses in the research, wildly different half-lives, and almost nothing in common except the K2 marketing band on the front of the bottle. Here is how to read a K2 label, what the doses actually are in the clinical literature, and why a stack of D3 + K2 from a single bundle is often shorting both.
#vitamin-k2#mk-4#mk-7#labels#supplement-scienceJune 16, 2026
Iron Supplement Forms: Ferrous Sulfate, Bisglycinate, and Heme — Elemental Iron Yield, Bioavailability, and Why the Label Number Means Three Different Things
Pick up three iron supplements off the same shelf. The first is ferrous sulfate at 325 mg per tablet. The second is iron bisglycinate at 30 mg per capsule. The third is heme iron polypeptide at 11 mg per capsule. The bottles look like three different doses of the same ingredient. They are not. The label number is the salt weight, not the elemental iron yield; the bioavailability ranges from 5% to 35% depending on form; the GI tolerability gap between forms is large enough that the form choice often decides whether the supplement gets taken at all. Here is the iron-form math by yield, bioavailability, dose, GI tolerability, and the label patterns that distinguish a usable iron product from one that gets abandoned in a drawer.
#iron#ferrous-sulfate#bisglycinate#labels#dosingJune 11, 2026
Choline Forms: Alpha-GPC, CDP-Choline, and Bitartrate — Why the Label Number Lies
Choline is one of the most label-distorted ingredients in the cognitive-supplement aisle. A bottle says "choline 500 mg" on the front and means three completely different things depending on which form is in the capsule. Choline bitartrate delivers about 41% choline by weight, alpha-GPC delivers about 40% choline by weight but crosses the blood-brain barrier reliably, and CDP-choline (citicoline) delivers about 18% choline by weight but carries a cytidine fragment that converts to uridine and does its own pharmacological work. Here is the choline-yield math by form, the bioavailability question the bottle does not answer, the dose ranges the human trials actually used, and the label patterns that distinguish a useful choline product from a cheaper-by-weight sub-threshold one.
#choline#alpha-gpc#cdp-choline#labels#dosingJune 9, 2026
Berberine: Why 1,500 mg/Day Split Three Times Is the Real Dose, and Why Most Bottles on the Shelf Are Sub-Threshold
Berberine is one of the few natural compounds with a clean, replicated human-trial signal on blood glucose and lipid metabolism — comparable to metformin in the head-to-head trials. The trials all used 1,500 mg/day split into three 500 mg doses with meals. The bottle on the shelf next to you almost certainly suggests 500 mg once daily, which is one-third of the clinical dose and below the threshold most of the human trials report as effective. Here is the dose math, the half-life that explains the three-times-daily structure, the bioavailability problem most labels ignore, and the label patterns that distinguish a clinical dose from a sub-threshold one.
#berberine#dosing#labels#bioavailability#supplement-scienceJune 4, 2026
Curcumin Bioavailability: Why a 500 mg Turmeric Capsule Is Mostly a Placebo Without the Right Form
Plain turmeric powder and standard curcumin extract are absorbed at maybe 1% of the labeled dose. The 500 mg on the front of the bottle is not the dose your bloodstream sees. Here is the bioavailability problem in numbers, the four delivery forms that actually solve it (piperine, liposomal, phytosome, micellar), and the label distinctions that decide whether the bottle is medicine or oat-colored sawdust.
#curcumin#turmeric#bioavailability#labels#supplement-scienceJune 2, 2026
Lion's Mane Fruiting Body vs Mycelium on Grain: The Label Distinction That Decides Whether the Bottle Is Mushroom or Filler
Most lion's mane bottles list a milligram dose and a vague 'mushroom complex' line. The label distinction that actually determines whether you are paying for mushroom or oat-flour filler — fruiting body vs mycelium on grain — is usually buried or absent. Here is how to read the label, what the research actually used, and where the cheap bottles cut corners.
#lions-mane#mushrooms#labels#nootropics#supplement-scienceMay 28, 2026
Rhodiola's Standardization Number: Why 3% Rosavins and 1% Salidroside Is the Dose That Matters, Not the Milligrams
Most rhodiola labels list a milligram dose and stop there. The numbers that actually predict whether the supplement works — rosavin percentage and salidroside percentage — are usually missing or buried. Here is how to read the label, what the clinical-trial extracts actually deliver, and where the cheap bottles cut corners.
#rhodiola#adaptogens#labels#extract-standardization#dosing#supplement-scienceMay 28, 2026
ZMA Doesn't Raise Testosterone: The SNAC Study, the Failed Replications, and What Actually Moves T
ZMA built its T-booster reputation on one 1999 study funded by the company selling it. Independent replications failed. The 2018 systematic review found no testosterone effect in iron-replete subjects. Here is the literature timeline, what's actually in the bottle, and which interventions do move T.
#zma#testosterone#zinc#magnesium#supplement-research#label-claimsMay 26, 2026
L-Theanine's 100 mg Problem: Why Most 'Calm Focus' Products Are Below the Research Dose
L-theanine works at 200 mg. Most products carry 50–100 mg. The gap between what the research uses and what the label delivers is the reason most 'calm focus' stacks underperform — here is the dose math and the label pattern that gives it away.
#l-theanine#labels#dosing#nootropics#supplement-scienceMay 21, 2026
CoQ10 vs Ubiquinol: The Form Question the Front of the Bottle Won't Answer
Two products on the same shelf, both labeled 100 mg, can deliver very different amounts of usable coenzyme Q10. The difference is the form — ubiquinone or ubiquinol — and a few details the front of the bottle never mentions. Here is how to read a CoQ10 label and what the research actually doses.
#coq10#ubiquinol#labels#forms#bioavailability#supplement-scienceMay 20, 2026
Zinc Forms Are Not Equal: Bisglycinate, Picolinate, Oxide, and What the Label Hides
A '50 mg zinc' label hides two things — which form of zinc is in the bottle, and how much of that number is elemental zinc the body can actually use. Here is how to read a zinc label, why form matters more than the front-of-bottle number, and what the research actually doses.
#zinc#labels#forms#dosing#supplement-science#researchMay 19, 2026
Ashwagandha's Withanolide Number: Why 600 mg of Generic Extract Isn't 600 mg of KSM-66
Most ashwagandha labels list a milligram dose and stop there. The number that actually predicts whether the supplement works — withanolide percentage — is usually missing or buried. Here is how to read the label, what the research-grade extracts actually deliver, and where the cheap bottles cut corners.
#ashwagandha#labels#extract-standardization#dosing#supplement-scienceMay 12, 2026
Citrulline Malate's 2:1 Trick: How Brands Show "8g" That's Really 5.3g Citrulline
Citrulline malate panels usually list a single big number — 6g, 8g, sometimes 10g. The research dosed pure L-citrulline. The two are not the same, and the gap between them is roughly 33%. Here is how to read the label and what the actual dose should be.
#citrulline#labels#dosing#transparency#supplement-scienceMay 11, 2026
Vitamin D3: Why 1,000 IU Falls Short for Most Adults
Most adult vitamin D supplements sit at 1,000 or 2,000 IU per serving — doses set decades ago and never updated against current serum-level research. Here is what the labels say, what the research actually uses, and how to read a vitamin D bottle in 30 seconds.
#vitamin-d#dosing#labels#supplement-science#researchMay 7, 2026
Fish Oil Labels Hide the EPA and DHA Dose
A '1,000 mg fish oil' softgel is rarely 1,000 mg of omega-3. Here is how to read a fish oil label, why concentration ratio matters more than total weight, and what the research actually doses.
#fish-oil#omega-3#epa-dha#labels#supplement-scienceMay 4, 2026
How to Read a Supplement Label in 60 Seconds
A supplement label tells you most of what you need to know about a product before you spend a dollar — if you know which lines actually matter. Here is the 60-second scan we use ourselves.
#labels#transparency#consumer-education#supplement-scienceApril 30, 2026
Electrolyte Powders Underdose Sodium: Why 200 mg Per Serving Isn't Doing What You Think
Most flavored electrolyte powders carry 100–300 mg of sodium per serving. The research target for hot exercise is 300–1,200 mg per hour. Here is how to read an electrolyte label, and why the gap between marketing and dose is structural, not accidental.
#electrolytes#sodium#labels#hydration#supplement-scienceApril 28, 2026
Beta-Alanine Is a Loading Supplement, Not a Pre-Workout
Beta-alanine works, but not the way the pre-workout label implies. Here is the loading math, the per-serving dose the research actually uses, and why the tingle is a skin signal — not a performance signal.
#beta-alanine#labels#dosing#supplement-science#researchApril 23, 2026
Magnesium Is Not One Ingredient: A Label-Literacy Guide to Forms and Doses
Most magnesium supplements list a number on the front of the bottle that is not the number that matters. Here is how to read a magnesium label — forms, elemental content, absorption, and what the research actually uses.
#magnesium#labels#transparency#supplement-science#researchApril 21, 2026
Collagen for Tendons: The 15g + Vitamin C Protocol
Collagen supplementation for tendon and ligament health is one of the few areas in sports nutrition where the research is both clear and specific — and where most products on the shelf are built to ignore it.
#collagen#labels#research#tendon-health#supplement-scienceApril 20, 2026
Proprietary Blends Are Where Underdosing Hides
Proprietary blends let brands list impressive-sounding ingredients without disclosing how much of each is actually in the product. Here is why we don't use them — and what to look for on a label that respects you.
#labels#transparency#supplement-scienceApril 15, 2026
How Much Creatine Actually Works
The clinical research on creatine monohydrate dosing — and why most products underdose it.
#creatine#performance#research