Easy methodology guide
How NutriScore grades greens powder labels and claims
NutriScore is a buyer-facing score built from label detail, public testing context, and claims a careful person can check.
The quick read
- The 0-100 NutriScore is an editorial buyer score, not a medical safety certificate or FDA approval stamp. Dietary supplements are not approved by FDA for safety and effectiveness before sale. FDA 101 dietary supplements NutriScore rankings
- Clear Supplement Facts labels, individual ingredient amounts, and easy-to-read serving details earn more trust than vague blends and unclear labels. FDA dietary supplement labeling guide NIH ODS dietary supplements consumer fact sheet
- Claims get stricter treatment when they sound health-adjacent. FDA says structure/function claims are not preapproved by FDA, and FTC expects health-product claims to be supported by competent and reliable scientific evidence. FDA structure/function claims FTC health products compliance guidance
- Testing disclosures, contamination context, and clear limitations matter because the buyer should not have to guess what the brand checked. FDA information for consumers using dietary supplements FDA 101 dietary supplements
What the evidence says
Bottom line
A NutriScore score is a practical trust read. It asks whether the product gives buyers enough public information to understand the label, compare the formula, and keep the marketing in proportion. NutriScore rankings
It is not a promise that a supplement is right for every person. NIH ODS reminds consumers to talk with health care providers about supplements they use, especially when medications, health conditions, pregnancy, or children are involved. NIH ODS dietary supplements consumer fact sheet
Think of the score like a label-reading shortcut. It rewards transparency and penalizes mystery.
The six buckets
The score buckets start with ordinary label rules: serving details, ingredient amounts, claim wording, and public safety context. FDA dietary supplement labeling guide FDA information for consumers using dietary supplements FDA structure/function claims
Label transparency
Can you see the serving size, ingredient names, and useful amounts clearly?
Dose clarity
Are important ingredients listed individually, or hidden inside a blend where the buyer cannot do the math?
Testing posture
Does the brand explain testing, certifications, COAs, or safety checks in a way a normal buyer can verify?
Claim discipline
Do the claims stay proportional to the evidence and label detail?
Additives and usability
Sweeteners, colors, gums, flavors, and serving practicality matter because people actually have to drink the thing.
Price pressure
A higher price raises the standard. If the label asks for premium money, it should bring premium clarity.
What earns trust
The easiest points to win are the plainest ones: a complete Supplement Facts panel, amounts per serving, ingredient names in plain language, and claims that stay inside what the panel shows. FDA dietary supplement labeling guide FDA structure/function claims
NutriScore's editorial follow-up asks what was tested, who tested it, when it was tested, and whether the numbers are public. NutriScore rankings
The score rises when the brand lowers the amount of guessing a buyer has to do. NutriScore rankings
What loses points fast
Long proprietary blends make dose checks harder without proving product quality one way or another. FDA labeling guidance explains that proprietary blends can show a total blend weight while listing blend ingredients in descending order by weight. FDA dietary supplement labeling guide
Big claims without clear dose context also lose trust. If the label borrows confidence from research, the product should show enough detail for the buyer to compare the claim to the formula. FTC health products compliance guidance FDA structure/function claims
The lowest-confidence labels make prominent front-label claims without supporting detail on the back label.
How to do the quick version yourself
Start with the Supplement Facts panel. Find the serving size, the amount per serving, and whether the headline ingredients have individual amounts. NIH ODS dietary supplements consumer fact sheet FDA dietary supplement labeling guide
Then read the claims. If the product says it supports energy, digestion, stress, immunity, or performance, ask what public evidence and label detail would make that claim fair. FDA structure/function claims FTC health products compliance guidance
Last, compare price with evidence. Higher-priced products warrant closer scrutiny when amounts are hidden or testing and marketing language is vague. NutriScore rankings
What the score is not
A score is not individualized medical advice. It does not know your medications, allergies, kidney function, pregnancy status, or what your clinician has told you. NIH ODS dietary supplements consumer fact sheet
It is also not FDA preapproval. FDA says dietary supplements are not approved for safety and effectiveness before they are sold to the public. FDA 101 dietary supplements
The score is a buyer tool. It helps you spend less time decoding labels and more time deciding whether the product deserves your attention. Open the rankings
Sources
- FDA 101 dietary supplements: https://www.fda.gov/consumers/consumer-updates/fda-101-dietary-supplements
- FDA dietary supplement labeling guide: https://www.fda.gov/food/dietary-supplements-guidance-documents-regulatory-information/dietary-supplement-labeling-guide-chapter-iv-nutrition-labeling
- FDA structure/function claims: https://www.fda.gov/food/food-labeling-nutrition/structurefunction-claims
- FDA information for consumers using dietary supplements: https://www.fda.gov/food/dietary-supplements/information-consumers-using-dietary-supplements
- FTC health products compliance guidance: https://www.ftc.gov/business-guidance/resources/health-products-compliance-guidance
- NIH ODS dietary supplements consumer fact sheet: https://ods.od.nih.gov/factsheets/WYNTK-Consumer/
Keep reading
Buyer hub
Best greens powders
Score-driven list pages built from the current ranking snapshot.
Rankings
Full score table
Compare overall, safety, efficacy, and transparency scores.
Tools
Label calculators
Run price, protein, transparency, and COA math locally.
Topic hub
Label reading guides
Follow the claim, dose, badge, allergen, and COA article cluster.
Topic hub
Safety and testing guides
Read the heavy-metal, COA, certification, and warning-label cluster.
Methodology
How scoring works
Read the organization-level scoring and corrections posture.
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 2026-09-01.
For research and educational purposes only. Not medical advice.