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
69
compounds tracked
January 2026
DSLD dump date
Today's insight
Formula Twins
175 identical products sold under 76 different brand names: Vitamin C 1,000 mg
“Vitamin C 1,000 mg” and 174 near-identical products are sold under 76 different brand names — the same underlying formula, white-labeled across the market, per the 2026-01-16 DSLD dump.
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From the blog
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The Claims Census: what US supplement labels actually say
251,337 label statements analyzed. Most common phrases, where risk-reduction wording comes from, and why 94.5% of iron and 91.4% of caffeine products carry a warning statement.
October 2, 2026
Collagen supplements: what labels declare vs. the doses that were studied
The median collagen product declares 1.8 g per serving; the cited trials used 2.5 to 15 g. Gummies run far lower. How hydrolyzed peptides, gelatin and UC-II differ, and what labels leave unsaid.
October 2, 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.
Tools and summaries
Browse compounds →
Form share, dose distributions and quality tiers for 69 vitamins, minerals, amino acids 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.