Easy methodology guide

How we score a greens powder 0-100

NutriScore is not a magic lab coat. It is a buyer-facing score built from label detail, public testing context, and claims a careful person can actually check.

Last reviewed: 2026-06-03Focus: 0-100 score, labels, testing, claims
For research and educational purposes only. Not medical advice.

The quick read

The short answer

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 without needing a decoder ring?

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 benefits sound proportional to the evidence and label detail, or did the marketing start doing pushups?

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 wins are boring in the best way: a complete Supplement Facts panel, clear amounts per serving, plain ingredient names, and claims that do not outrun the label. FDA dietary supplement labeling guide FDA structure/function claims

A strong product also makes safety checks easier to understand. If a brand talks about testing, the useful follow-up is what was tested, who tested it, when it was tested, and whether the numbers are public. FDA information for consumers using dietary supplements

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 are not automatic villains, but they make dose checks harder. 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 are the ones that ask you to believe the front of the tub while the back of the tub whispers.

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 to proof. The more a product costs, the less patience it should get for hidden amounts, vague testing language, and brand poetry. 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

  1. FDA 101 dietary supplements: https://www.fda.gov/consumers/consumer-updates/fda-101-dietary-supplements
  2. FDA dietary supplement labeling guide: https://www.fda.gov/food/dietary-supplements-guidance-documents-regulatory-information/dietary-supplement-labeling-guide-chapter-iv-nutrition-labeling
  3. FDA structure/function claims: https://www.fda.gov/food/food-labeling-nutrition/structurefunction-claims
  4. FDA information for consumers using dietary supplements: https://www.fda.gov/food/dietary-supplements/information-consumers-using-dietary-supplements
  5. FTC health products compliance guidance: https://www.ftc.gov/business-guidance/resources/health-products-compliance-guidance
  6. NIH ODS dietary supplements consumer fact sheet: https://ods.od.nih.gov/factsheets/WYNTK-Consumer/

Corrections: send corrections or updated label/source evidence to support@nutriscore.fit.