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
Prenatal Vitamins
Only 26.9% of prenatal vitamins contain any choline
Of 543 on-market prenatal supplements in the 2026-01-16 DSLD dump, 146 list choline. The median declared amount among them is 30 mg, against a pregnancy Adequate Intake of 450 mg per day from all sources.
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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.