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
Today's insight
Market scale
121,959 dietary supplement products are on-market in the NIH DSLD, from 5,801 brands
As of the 2026-01-16 DSLD dump, 121,959 products from 5,801 distinct brands are on-market, out of 214,780 labels ever submitted to the database.
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From the blog
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Formula Twins: the same supplement, sold under 92 different names
213 products sold under 92 brand names share one identical formula — one of 3,699 such clusters, covering 15.3% of on-market supplements. How private-label manufacturing works.
September 27, 2026
Melatonin isn't a vitamin, and the market treats its dose that way
Melatonin has no RDA, no established UL, and no regulatory dose ceiling. On-market doses run 1–10mg; the research behind its sleep-onset effect mostly used 0.5–5mg.
September 27, 2026
Supplement news →
Recalls, FDA and FTC actions, industry and research headlines — updated daily, linked to the original publishers.
Flagship reports
Restricted Elsewhere
Additives restricted by FDA or the EU that are still listed on US supplement labels.
Prenatal Vitamins
How many prenatals include choline, iodine and DHA — and at what doses.
Kids' Supplements
Gummies, synthetic dyes, and per-serving doses above children's upper intake levels.
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.
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.