Insights
73 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. Follow along with the RSS feed.
Cheap Form Index
98.1% of Curcumin (Curcuminoids) products use a bottom-tier, low-bioavailability form
Cheap Form Index
49.6% of Ashwagandha (Withania somnifera) products use a bottom-tier, low-bioavailability form
Cheap Form Index
Ashwagandha (Withania somnifera)'s cheap-form share fell 14.0 points year-over-year
Cheap Form Index
Copper's cheap-form share fell 5.8 points year-over-year
Formula Twins
212 identical products sold under 91 different brand names: Super CoQ-10 100 mg
Formula Twins
175 identical products sold under 76 different brand names: Vitamin C 1,000 mg
Formula Twins
164 identical products sold under 74 different brand names: High Potency Vitamin C 500 mg
Formula Twins
126 identical products sold under 82 different brand names: Creatine 5 grams
Formula Twins
115 identical products sold under 79 different brand names: Vitamin D3 5000 IU
Gummy Tax
Inositol (myo-Inositol) gummies deliver just 0.08% of the dose in capsule/tablet versions
Gummy Tax
Choline gummies deliver just 0.12% of the dose in capsule/tablet versions
Gummy Tax
Thiamine (Vitamin B1) gummies deliver just 3.8% of the dose in capsule/tablet versions
Gummy Tax
Riboflavin (Vitamin B2) gummies deliver just 5.4% of the dose in capsule/tablet versions
Gummy Tax
Lutein gummies deliver just 8.8% of the dose in capsule/tablet versions
Gummy Tax
Vitamin B12 (Cobalamin) gummies deliver just 9.6% of the dose in capsule/tablet versions
Gummy Tax
Magnesium gummies deliver just 10% of the dose in capsule/tablet versions
Gummy Tax
Pantothenic Acid (Vitamin B5) gummies deliver just 15% of the dose in capsule/tablet versions
Gummy Tax
Boron gummies deliver just 15% of the dose in capsule/tablet versions
Gummy Tax
Omega-3 Fatty Acids (EPA + DHA) gummies deliver just 16% of the dose in capsule/tablet versions
Upper Limit Watch
29.5% of Niacin (Vitamin B3) products declare a dose above the adult Tolerable Upper Intake Level
Upper Limit Watch
9.0% of Magnesium products declare a dose above the adult Tolerable Upper Intake Level
Upper Limit Watch
3.0% of Zinc products declare a dose above the adult Tolerable Upper Intake Level
Upper Limit Watch
2.8% of Iron products declare a dose above the adult Tolerable Upper Intake Level
Upper Limit Watch
1.7% of Vitamin A products declare a dose above the adult Tolerable Upper Intake Level
Upper Limit Watch
1.1% of Vitamin B6 (Pyridoxine) 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
Claims Census
94.5% of iron products carry a required warning statement
Claims Census
91.4% of caffeine products carry a required warning statement
Claims Census
The most common label phrase across brands: “in the u s a”, used by 126 brands
Churn
The median US dietary supplement stays on shelves 733 days (~2.0 years) before going off-market
Churn
Vitamin Discount Center's products churn off-market in a median of just 24 days
Geography
760 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
80.8% of Omega-3 Fatty Acids (EPA + DHA) occurrences on labels are hidden inside a proprietary blend
Proprietary Blends
69.4% of Chlorella 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
98.1% of Curcumin (Curcuminoids) products use Plain curcuminoids / standardized turmeric extract (>=95% curcuminoids) as their primary form
Compound snapshot
97.6% of Coenzyme Q10 products use Ubiquinone (oxidized form) as their primary form
Compound snapshot
96.1% of Calcium products declare a dose below the RDA
Compound snapshot
94.7% of Magnesium products declare a dose below the RDA
Compound snapshot
90.9% of Folate (Vitamin B9) products use Folic Acid as their primary form
Compound snapshot
89.1% of Choline products use Choline Bitartrate as their primary form
Compound snapshot
80.5% of Vitamin K products declare a dose below the RDA
Compound snapshot
77.2% of Iron products declare a dose below the RDA
Compound snapshot
62.5% of Manganese products declare a dose below the RDA
Compound snapshot
50.3% of Zinc products declare a dose below the RDA
Compound snapshot
50.0% of Vitamin D products declare a dose below the RDA
Trending
New Chondroitin Sulfate product launches are down 57% year-over-year
Trending
New Glucosamine product launches are down 54% year-over-year
Trending
New Collagen (Hydrolyzed Collagen Peptides) product launches are down 46% year-over-year
Trending
New Omega-3 Fatty Acids (EPA + DHA) product launches are down 45% year-over-year
Trending
New Methylsulfonylmethane (MSM) product launches are down 42% year-over-year
Restricted Elsewhere
264 US supplements still list Red No. 3, which FDA has revoked for foods and supplements from January 2027
Restricted Elsewhere
4,518 US supplements list titanium dioxide, removed from the EU's approved food additives in 2022
Restricted Elsewhere
3,692 US supplements list at least one of the six synthetic dyes FDA asked industry to phase out
Prenatal Vitamins
Only 26.9% of prenatal vitamins contain any choline
Prenatal Vitamins
51.4% of prenatal vitamins provide the 150 mcg of iodine thyroid specialists recommend
Prenatal Vitamins
29.5% of prenatal vitamins contain any omega-3 fatty acids
Kids' Supplements
28.4% of supplements made only for children are gummies
Kids' Supplements
64 of 138 Niacin (Vitamin B3) supplements for toddlers declare more per serving than the UL for ages 1-3
Kids' Supplements
31 of 166 Vitamin A supplements for toddlers declare more per serving than the UL for ages 1-3
Kids' Supplements
15 of 128 Magnesium supplements for toddlers declare more per serving than the UL for ages 1-3
Serving Sizes
45.7% of capsule, tablet and gummy products define one serving as two or more units
Serving Sizes
90.8% of Creatine capsule and tablet products split one serving across several units
Serving Sizes
Magnesium products over the adult UL rise from 9.0% to 14.9% at the label's maximum daily servings
Claims vs. Ingredients
Only 220 of 54,229 supplements making a vegan or free-from claim list a conflicting ingredient
FDA Recalls
60 on-market DSLD labels share a UPC with a product in an FDA supplement recall record
Certifications
Only 0.6% of on-market supplement labels name a USP, NSF or ConsumerLab testing mark
Certifications
2.2% of Creatine products name a sport-testing mark, the highest of any compound
Market scale
121,959 dietary supplement products are on-market in the NIH DSLD, from 5,801 brands