Label reading hub
Supplement label reading guides for smarter comparisons
Practical guides for reading Supplement Facts panels, dose claims, testing badges, sweeteners, allergens, lot numbers, and the fine print brands hope you skip.
Last reviewed: 2026-08-13
Key takeaways
- Use this first when a product leans on agency language, certification badges, proprietary blends, or clinically studied dose claims.
- Run a local checklist for proprietary blends, testing proof, serving math, sweeteners, and disclosure gaps.
- The cluster links to 14focused guides and shows each guide's review date.
- This cluster points readers toward existing source-backed guides and the regulator/testing references used across the label-literacy articles:
Where to start
Bottom line
Start with Supplement label scams: FDA-approved claims and fake badges. Use this first when a product leans on agency language, certification badges, proprietary blends, or clinically studied dose claims.
Start with the scam check
Supplement label scams: FDA-approved claims and fake badges
Use this first when a product leans on agency language, certification badges, proprietary blends, or clinically studied dose claims.
Useful tool
Greens transparency checklist
Run a local checklist for proprietary blends, testing proof, serving math, sweeteners, and disclosure gaps.
Open checklistSource context for label claims
This cluster points readers toward existing source-backed guides and the regulator/testing references used across the label-literacy articles:
Read the cluster
Article guides
Methodology guide
Score guideHow NutriScore grades greens powder labels and claims
A plain-English guide to NutriScore's buyer score: label transparency, dose clarity, testing posture, claim discipline, additives, and price context.
Last reviewed: 2026-06-03
Scam check
Trust checkSupplement label scams: FDA-approved claims and fake badges
A practical guide to FDA-approved supplement claims, fake or weak testing badges, proprietary blends, and clinically studied dose language.
Last reviewed: 2026-06-04
Blend guide
Dose clarityProprietary blend is a red flag: how to read past it
What proprietary blends tell you, what they hide, and how to read the blend without assuming the worst.
Last reviewed: 2026-06-03
Tiny-dose guide
Dose checkFairy dusting in supplements: how tiny doses can hide
A lighter guide to token doses, proprietary blends, and how to tell whether a headline ingredient is present in a useful amount.
Last reviewed: 2026-06-03
Dose guide
Evidence fitClinically significant dose vs whatever is on the label
How to match supplement dose claims against the label, the evidence, and the math hiding behind clinically studied language.
Last reviewed: 2026-06-03
Claim language guide
Claim guideSupplement claim words: what the evidence should prove
Detox, immune, anti-aging, mood support. A method for testing whether a front-panel word is attached to a named ingredient, an amount, and real evidence.
Last reviewed: 2026-09-01
Dose math guide
Serving mathSupplement serving traps: scoops, gummies, and math
One serving can be two scoops or four gummies. Learn how declared servings change daily intake, container math, and cost.
Last reviewed: 2026-09-01
Certification guide
Badge checkSupplement certification badges: what they really prove
NSF and USP marks say something real about manufacturing and far less about efficacy. What to check behind a badge or a third-party-tested claim.
Last reviewed: 2026-09-01
Nutrient form guide
Form guideVitamin and mineral forms: how to read label names
How to read compound forms and labeled amounts for magnesium, iron, vitamin D, vitamin A, and vitamin K.
Last reviewed: 2026-09-01
Additive clarity guide
AdditivesHow to read sweetener and flavoring terms on labels
Natural flavors, lightly sweetened, and a list of sweetener names. How to read the flavor system without letting it stand in for the dose table.
Last reviewed: 2026-09-01
Nutrition label guide
Nutrition mathFiber, carbs, and sugar: how to compare label math
Fiber grams, sugar alcohols, and total carbs across powders and ready-to-drink formulas. How to compare two labels at the same serving size.
Last reviewed: 2026-09-01
Stimulant label guide
StimulantsCaffeine on supplement labels: find every stimulant
How to identify stimulant sources, collect declared amounts, and confirm a caffeine total across products.
Last reviewed: 2026-09-01
Safety label guide
Safety textAllergen and cross-contact warnings on supplement labels
Allergen statements and precautionary warnings vary widely in how much they tell you. What specific warning text looks like, and when to ask a clinician.
Last reviewed: 2026-09-01
Quality verification guide
COA contextBatch testing and lot numbers: what a COA can miss
Batch-tested sounds authoritative until you ask what was measured, in which sample, and against which limits. How to read lot numbers and reports.
Last reviewed: 2026-09-01
How to use this cluster
Start with the scam guide when a label borrows trust from FDA language, badges, or study phrases.
Use the dose and blend guides when the active amount is hidden or the serving math feels slippery.
Use the badge, allergen, and batch-testing guides when a product asks you to trust quality signals.
How this article was made
NutriScore has not commissioned independent clinical review of this article.
Read the editorial policy and scoring methodology. Sources favor primary canon, regulators, product labels, and peer-reviewed research; reputable secondary reporting is identified when used.
Corrections: send corrections or updated label/source evidence to support@nutriscore.fit or use the contact page.
Sources: 6 entries, all primary canon, last reviewed 2026-08-13.
For research and educational purposes only. Not medical advice.