Supplement Label Index

Insights

57 auto-generated, data-backed findings from the NIH DSLD — a new one featured on the homepage every day.

Every entry here is computed directly from the January 2026 DSLD dump — no editorializing, just the number and where it comes from. Free to quote, tweet, or cite with a link back.

Cheap Form Index

98.5% of Curcumin (Curcuminoids) products use a bottom-tier, low-bioavailability form

Cheap Form Index

77.9% of Ashwagandha (Withania somnifera) products use a bottom-tier, low-bioavailability form

Cheap Form Index

Ashwagandha (Withania somnifera)'s cheap-form share fell 10.9 points year-over-year

Cheap Form Index

Copper's cheap-form share fell 5.8 points year-over-year

218 identical products sold under 96 different brand names: Fish Oil +Co Q-10

175 identical products sold under 76 different brand names: Vitamin C 1,000 mg

167 identical products sold under 75 different brand names: High Potency Vitamin C 500 mg

126 identical products sold under 82 different brand names: Creatine 5 grams

117 identical products sold under 80 different brand names: Vitamin D3 5000 IU

Choline gummies deliver just 0.12% of the dose in capsule/tablet versions

Riboflavin (Vitamin B2) gummies deliver just 6.0% of the dose in capsule/tablet versions

Thiamine (Vitamin B1) gummies deliver just 7.5% of the dose in capsule/tablet versions

Vitamin B12 (Cobalamin) gummies deliver just 9.6% of the dose in capsule/tablet versions

Lutein gummies deliver just 10% of the dose in capsule/tablet versions

Magnesium gummies deliver just 11% of the dose in capsule/tablet versions

Pantothenic Acid (Vitamin B5) gummies deliver just 15% of the dose in capsule/tablet versions

Vitamin B6 (Pyridoxine) gummies deliver just 17% of the dose in capsule/tablet versions

Manganese gummies deliver just 19% of the dose in capsule/tablet versions

Zinc gummies deliver just 25% of the dose in capsule/tablet versions

Upper Limit Watch

22.2% of Niacin (Vitamin B3) products declare a dose above the adult Tolerable Upper Intake Level

Upper Limit Watch

21.6% of Vitamin A products declare a dose above the adult Tolerable Upper Intake Level

Upper Limit Watch

4.6% of Magnesium products declare a dose above the adult Tolerable Upper Intake Level

Upper Limit Watch

2.6% of Zinc products declare a dose above the adult Tolerable Upper Intake Level

Upper Limit Watch

2.2% of Iron products declare a dose above the adult Tolerable Upper Intake Level

Upper Limit Watch

1.1% of Selenium products declare a dose above the adult Tolerable Upper Intake Level

Upper Limit Watch

1.0% of Vitamin B6 (Pyridoxine) products declare a dose above the adult Tolerable Upper Intake Level

94.5% of iron products carry a required warning statement

91.4% of caffeine products carry a required warning statement

The most common label phrase across brands: “in the u s a”, used by 126 brands

The median US dietary supplement stays on shelves 733 days (~2.0 years) before going off-market

Vitamin Discount Center's products churn off-market in a median of just 24 days

725 brands are headquartered in CA — more than any other US state

Proprietary Blends

27.2% of on-market supplements hide at least one ingredient's dose inside a proprietary blend

Proprietary Blends

89.6% of Probiotics (Total CFU) occurrences on labels are hidden inside a proprietary blend

Proprietary Blends

72.3% of Omega-3 Fatty Acids (EPA + DHA) occurrences on labels are hidden inside a proprietary blend

Proprietary Blends

60.6% of Caffeine occurrences on labels are hidden inside a proprietary blend

Compound snapshot

100.0% of L-Theanine products use L-Theanine (generic/unbranded) as their primary form

Compound snapshot

99.9% of Potassium products declare a dose below the RDA

Compound snapshot

99.0% of Quercetin products use Quercetin Dihydrate as their primary form

Compound snapshot

98.5% of Curcumin (Curcuminoids) products use Plain curcuminoids / standardized turmeric extract (>=95% curcuminoids) as their primary form

Compound snapshot

98.3% of Choline products use Choline Bitartrate as their primary form

Compound snapshot

97.6% of Coenzyme Q10 products use Ubiquinone (oxidized form) as their primary form

Compound snapshot

96.8% of Calcium products declare a dose below the RDA

Compound snapshot

96.3% of Magnesium products declare a dose below the RDA

Compound snapshot

92.1% of Folate (Vitamin B9) products use Folic Acid as their primary form

Compound snapshot

81.5% of Vitamin K products declare a dose below the RDA

Compound snapshot

78.4% of Iron products declare a dose below the RDA

Compound snapshot

77.9% of Ashwagandha (Withania somnifera) products use Root powder (whole, unstandardized) as their primary form

Compound snapshot

63.0% of Manganese products declare a dose below the RDA

Compound snapshot

52.3% of Zinc products declare a dose below the RDA

Compound snapshot

51.0% of Vitamin D products declare a dose below the RDA

New Glucosamine product launches are down 54% year-over-year

New Collagen (Hydrolyzed Collagen Peptides) product launches are down 46% year-over-year

New Omega-3 Fatty Acids (EPA + DHA) product launches are down 44% year-over-year

New Iron product launches are down 39% year-over-year

New Creatine product launches are up 39% year-over-year

121,959 dietary supplement products are on-market in the NIH DSLD, from 5,801 brands