The label decoder.
Paste any supplement's ingredient panel. We'll flag proprietary blends, spot ingredients with no disclosed dose, and explain what the label is - and isn't - telling you.
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Method & sources
This reflects US supplement-labeling rules (21 CFR 101.36). Under those rules a "proprietary blend" may list only its combined weight, with ingredients in descending order by weight - so the dose of any single ingredient can be hidden. The tool counts how many of your ingredients show an exact amount, flags blends and missing doses, and reports a transparency percentage. It judges disclosure, not safety or effectiveness.
- 21 CFR 101.36 - Nutrition labeling of dietary supplements (Supplement Facts panel; proprietary blends; "Daily Value not established").
- FDA. Dietary Supplement Labeling Guide.
- 21 CFR 101.93 - Structure/function claims and the required FDA disclaimer.
- FDA. The FASTER Act: Sesame is the 9th Major Food Allergen (effective Jan 1, 2023).
- FTC. Health Products Compliance Guidance.
How to read a supplement label.
A supplement label has to list its ingredients, but it does not have to make them easy to understand. This tool turns a label into a plain-English transparency check so you can compare products on the same terms.
Proprietary blends
A "proprietary blend" (sometimes called a complex, matrix, or formula) lists several ingredients under one combined weight, without showing how much of each is inside. The label might say "Energy Blend 500 mg" with five ingredients under it - but you cannot tell whether the headline ingredient is 480 mg or 5 mg. The tool flags every blend it finds.
Amounts and % Daily Value
Ingredients with an established Daily Value (many vitamins and minerals) show a "% DV" - how one serving compares to the general daily reference intake. Ingredients without an official Daily Value (herbs, amino acids, botanicals) show an amount but no %DV, which is normal. What matters for transparency is whether an exact amount is shown at all.
Descending order
Within a blend, ingredients are listed heaviest first. So if a well-known "hero" ingredient appears near the end of a blend, it is present in a smaller amount than everything listed above it - often far below the amount used in research.
What this tool doesn't do
It reads the text you paste - it can't confirm the product is accurate, safe, or right for you, and it doesn't recommend a dose. It's a transparency lens for labels, not health advice. For what to actually take, talk to a healthcare provider.