How to Read a Supplement Facts Label
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The most useful label questions are simple: what is the serving size, what ingredients are present, how much of each is provided, and which amounts are hidden inside a proprietary blend?
Serving size
Do not confuse “per serving” with “per container.” If a product requires multiple servings, calculate total daily exposure.
Proprietary blends
A blend may list ingredients without giving individual amounts. That can make it difficult to compare a product with doses used in research.
Percent Daily Value
Not every supplement ingredient has an established Daily Value. Absence of a %DV is not evidence that an ingredient is ineffective—or effective.