Label snapshot
What the product contains and what one serving costs, according to our catalog. Label amounts are not personal dose recommendations.
Amounts are per label serving as recorded in the catalog and are not a recommendation. Testing status reflects what the brand lists. Nothing here is medical advice.
These calculations describe our scoring method. They are not a recommended dose or proof of benefit from this product.
Tested by independent lab, top 14% value.
Read the evidence (1 study)Evidence gates dose: the evidence grade sets the ceiling, and the dose decides how much of that ceiling the product reaches. Value = inverse of price-per-trial-dose-day. Community = mean sentiment of external reviews. Safety caps applied after weighting.
This score is our editorial judgment, not a scientific standard. We combine published evidence, dose, price, transparency, and consumer signals into one composite: this is our method, not a peer-reviewed clinical rating. A higher score means a product does better on the factors we weight, not that it is medically proven to work.
This DoNotAge Glycine & NAC scores 5.8, making it below the site average. It delivers 300mg of NAC, 50% of the studied range low edge (600mg) with grade B evidence (promising human data, not yet comprehensive).
The science behind each active ingredient, independent of which brand sells it.
Cheap amino acid with better sleep and glutathione-precursor benefits.
Cysteine donor for glutathione synthesis; drug-strength efficacy for specific uses.
Every active in this formula, its declared dose per serving, the dose used in the primary human trial, how much of that trial dose this product delivers, and the evidence grade for the ingredient itself.
| Ingredient | Dose / serving | Research dose | % of research | Evidence grade |
|---|---|---|---|---|
| Glycine | 300 mg | 3000 mg | 10% | B |
| NAC | 300 mg | 600 mg | 50% | B |
Percentages are dose per serving ÷ primary trial dose. Below 50% means the formula is unlikely to reproduce the trial outcome for that active. Grade A = multiple large human RCTs. Grade F = no human evidence. How grades work. Full glossary →
The specific product: dose, price, transparency, and what buyers report.
Safety flags, transparency gaps, dosing concerns, and recurring buyer complaints.
The main ingredients of this product, in plain language.
Cheap amino acid with better sleep and glutathione-precursor benefits.
Read about Glycine →Cysteine donor for glutathione synthesis; drug-strength efficacy for specific uses.
Read about NAC →Hard numbers and independently checked status. Expand each block for its source.
All product data is checked against original sources. Prices, doses, and testing status are updated when product pages change. Evidence grades are reviewed when new human RCTs are published. Read how we verify.
4.38 out of 5 across 310 verified reviews on 3 platforms.
High confidenceConsumer sentiment compiled from 3 public sources.
301 reviews · 4.4/5 · positive sentiment
DoNotAge's Trustpilot rating is consistently 'Excellent' (4.4-4.6/5) across hundreds of reviews, citing product purity and research backing.
Compiled from Trustpilot listing located during research; verified at build time.
9 reviews · 3.8/5 · mixed sentiment
A smaller international retail listing shows mixed feedback (3.8/5) on smell and additive-free formulation.
Compiled from Amazon (via Desertcart cross-listing) listing located during research; verified at build time.
3 threads discussed · mixed sentiment
Reddit's r/Supplements and r/healthylongevity discuss GlyNAC supplementation broadly, with some users reporting unexpected side effects.
Compiled from Reddit listing located during research; verified at build time.
These are consumer sentiment signals. They do not measure whether the product actually works. See our evidence section for that.
No external reviews aggregated yet for this product.
Published evidence, claim checks, regulatory status and what could not be verified.
The studies that established the trial dose and evidence grade for each active ingredient in this product. Click through to read the original paper.
Convenient combo of the two GlyNAC components, but dosed far lower (300mg each) than the roughly 0.1g/kg-bodyweight doses used in the human GlyNAC aging-biomarker trials.
If you are the manufacturer or brand owner of Glycine & NAC and believe any data on this page is incorrect (wrong dose, wrong ingredient, wrong price, missing certification, outdated status), you can request a correction.
We review every request, verify it against primary sources, and publish any accepted change with a dated note. Corrections from brand owners are treated the same as corrections from anyone else: verified before they move.
Request a correction →The next highest-scoring products in Amino acid, same scoring method, same rules.
Thorne HealthTechStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
BulkSupplementsStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Double Wood SupplementsStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
DoNotAgeStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
DoNotAgeStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
DoNotAgeStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
DoNotAgeStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
DoNotAgeStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.