Supplement Labels vs Lab: What NIH DSID Actually Measured
NIH DSID compared labeled vs lab amounts across US supplement categories. See what the data show and what they cannot tell you about one bottle.
Foundations
How to evaluate supplements, not just which ones to buy.
Reference guides that sit underneath every comparison article on this site. Read these once and the rest of our coverage gets sharper — because you will know how we make our calls.
About this hub
What belongs here: the editorial school under every comparison on this site: how to read a supplement label, how we grade evidence, certification literacy, and methodology references.
What does not: condition-specific buying rankings. Those live in the topic hubs. Foundations teaches the checks, not which SKU to buy for ED or GLP-1 support.
Start here: the 90-second label checklist if you want the portable buying filter before opening a comparison guide.
Evidence tools
Trial presets and label checks — runs in your browser, nothing stored.
All guides in this category
Supplement Trends and Hype 2026: What Won't Survive 2027
Four show floors and one honest read on supplement hype: GLP-1 mimics, shilajit, mushrooms, polyol chews. Which labels are worth checking, which are theatre.
What Does Third-Party Tested Mean? NSF, USP, ConsumerLab
What NSF, USP, ConsumerLab, and Informed Sport actually verify, and what a third-party tested claim on the front label still does not prove.
How to Read a Supplement Label: The 90-Second Checklist Before You Buy
Five checks that expose underdosed products, hidden proprietary blends, and marketing hype. About 90 seconds per label, no chemistry background needed.