The front of a bottle is advertising. The Supplement Facts panel is the standardized starting point for understanding what a US dietary supplement says it contains.
Why does serving size come first?
Every amount in the panel is tied to the stated serving. A product may describe “one serving” as two capsules, a scoop or several gummies. Check both serving size and servings per container before comparing dose or cost.
The FDA’s supplement labeling guide sets out how dietary ingredients, amounts and percent Daily Value are declared. Compare like with like: amount per serving, not the most prominent number on the front panel.
What does percent Daily Value mean?
Percent Daily Value shows how much a nutrient in one serving contributes to a daily diet using FDA reference values. FDA’s consumer guide uses 5% DV or less as a general “low” guide and 20% DV or more as “high.” These are label-reading shortcuts, not personalized intake targets.
Some dietary ingredients have no established Daily Value. The label should say so; the absence of a Daily Value does not establish effectiveness or safety.
What is hidden by a proprietary blend?
A proprietary blend generally declares the blend’s total weight and lists its ingredients in descending order by weight. It may omit the quantity of each ingredient inside the blend. You can therefore see what is included but not necessarily determine each dose.
That opacity does not by itself prove a product is harmful. It does mean you cannot make a complete dose comparison or readily assess how much of a particular ingredient you would consume.
Which details sit outside Supplement Facts?
Read the rest of the package for:
- other ingredients, such as capsule materials, flavours or fillers;
- suggested use and serving frequency;
- warnings, age or pregnancy cautions, and storage instructions;
- the manufacturer’s or distributor’s identity and contact information.
The FDA explains that supplements are regulated as food, not preapproved like drugs. A compliant-looking panel is not an FDA effectiveness review.
What should I do before taking it?
Record the exact product, ingredient list, serving size and amount. Share that information with a clinician or pharmacist when you take prescription or over-the-counter medicines, are pregnant, have a condition, or are planning surgery. A label is essential evidence about the package; it is not an individual interaction check.