A supplement label is a legal document, not a marketing brochure, and once you know how to read it you can compare two products in under a minute. This guide walks through every part of the label and the small print that manufacturers hope you will skip.
Start with the serving size
Every amount on the label refers to one serving, not one capsule. If the serving size is "2 capsules" and the bottle holds 60 capsules, you are buying a 30-day supply, and the dose you see is split across two capsules. A product that looks cheaper per bottle can be more expensive per day once you account for serving size.
Understand % Daily Value (%DV)
The %DV tells you how a serving fits into a general daily diet. A value above 100% is not automatically better; for some nutrients, more simply means more is excreted. Where an ingredient has no established %DV, the label will say so, which is common for botanical extracts.
Watch for proprietary blends
Actives versus fillers
The "Other Ingredients" line lists everything that is not an active: capsule material, flow agents, and fillers such as magnesium stearate, silicon dioxide or rice flour. These are usually harmless in small amounts, but a very long "other" list next to a short active list can be a sign of an under-dosed formula.
A quick checklist
| Look for | Why it matters |
|---|---|
| Dose per ingredient | Lets you compare against research amounts |
| Standardized extracts | Consistent active content batch to batch |
| Third-party testing seal | Independent check of purity and potency |
| Manufacturing facility | FDA-registered / GMP facilities follow quality rules |
None of this replaces a conversation with your own clinician, but it puts you on equal footing with the label and helps you spend on formulas that actually disclose what they contain.