The census bureau for supplement labels
Supplement Label Index analyzes what US dietary supplement labels actually declare — form share, dose distributions, excipient prevalence, and brand-level patterns — computed directly from the NIH Dietary Supplement Label Database. Not a product review site. Not a "best of" list. Just the market, as declared.
121,959
on-market products analyzed
5,801
brands
40
compounds tracked
January 2026
DSLD dump date
Flagship reports
Cheap Form Index
Which compounds are most often sold in their lowest-bioavailability form.
Formula Twins
Identical formulas sold under dozens of different brand names.
Gummy Tax
How much less active ingredient gummies deliver vs. capsules.
Upper Limit Watch
Products whose declared dose exceeds the tolerable upper intake level.
Proprietary Blends
How much of the market hides doses inside undisclosed blends.
Churn
How long products stay on shelves before going off-market.
Browse compounds →
Form share, dose distributions and quality tiers for 40 vitamins, minerals and popular botanicals.
Browse brands →
Report cards for every brand with 10+ on-market SKUs.
Browse excipients →
Prevalence of fillers, colors and sweeteners — plus "supplements without X" directories.