Label check
Comparing supplements with proprietary blends
Compare what is actually disclosed. A blend total is not the amount of each component, so two equal totals do not establish equal ingredient doses.
Part of Medicines
This check covers US labels. Start with the exact package and variant you have, then use the steps below. Explore more supplements checks.
What to look at
- Record the total blend amount.
- Record each named component in order.
- Mark individual amounts as undisclosed when the panel does not provide them.
Read this label.
Blend: 500 mg; three ingredients listed
Illustrative excerpt · not a real productDo not divide 500 mg by three and assign equal amounts. The label has not supplied that information.
Why this reading matters
Read the serving basis before the ingredient amounts. A mineral source can be named beside the nutrient; botanical plant parts and proprietary blends carry additional information that a headline number can hide. US Food and Drug Administration.
A supplement label gives ingredients and amounts, but it does not establish whether you need the product. Independent quality seals do not guarantee that a supplement is effective or safe for everyone. NIH Office of Dietary Supplements.
What the label cannot settle
This comparison cannot establish equivalent effects or medication compatibility.
Put the check to work
Compare the exact words and amounts on your package with the example. If a panel is missing, a photo is unreadable or the manufacturer has not disclosed a detail, keep that detail as unknown. A different flavor, shade or formulation needs its own check.
For the full reading method, use our supplements label guide. The medicines and supplements guide adds context for your needs.
A useful next check
- What Daily Value not established means
- Reading the serving on liquid supplements
- Comparing supplement prices per labeled serving
Sources read and this label example reviewed on 2026-09-23. Examples are illustrative, not product tests or clinical reviews.
Sources
- Dietary Supplement Labeling Guide: Nutrition Labeling US Food and Drug Administration · fda.gov Serving basis, source forms, botanical plant parts, blends; not historical nutrient reference values
- Dietary Supplements: What You Need to Know NIH Office of Dietary Supplements · ods.od.nih.gov Supplement labeling, quality seals, safety and effectiveness