vitamin
Thiamin supplements
Half of the 9,830 thiamin supplements in the NIH label database that print an amount list 5 mg or less per serving; the middle half list 1.5 mg to 25 mg (DSLD version 9.4.0, January 2026). The 103 products whose only supplement ingredient is thiamin list a median of 100 mg.
- Products listing it
- 10,1239,830 print an amount; 277 list it inside a blend without an amount
- Median per serving
- 5 mgmiddle half 1.5 mg to 25 mg
- FDA Daily Value
- 1.2 mgthe median is 417% of it
How much thiamin do supplements contain?
The median product lists 5 mg per serving. One in ten lists 0.6 mg or less, one in ten 50 mg or more. The amount printed most often is 1.5 mg (1,163 products).
Products by amount of thiamin per serving
9,830 products, log scale; extreme 0.2% at each end left out of the drawing.
Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).
How do the amounts compare with the Daily Value and the upper limit?
The FDA Daily Value for thiamin is 1.2 mg (adults and children 4 and older). The median product gives 417% of it per serving; the 90th percentile 4167%.
The upper limit is for total intake from food, water and supplements unless stated, and does not apply under medical supervision. A label amount is what the maker printed. This is data, not advice: the NIH ODS fact sheets explain what each nutrient does.
Sources: 21 CFR 101.9(c)(8)(iv) (Daily Values); Institute of Medicine, DRI summary tables (2011) (upper limits); on reading them, the FDA's Daily Value page.
Which products list the most thiamin?
On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).
- Super Potency Vitamin B 1 (Thiamin) 500 mgSolgar500 mg
- Vitamin B1 High Potency 500 mgBIOVEA500 mg
- Vitamin B1 500 mgNutraBio500 mg
- Vitamin B1 500 mgDr. Clark Store500 mg
- Vitamin B1 500 mgDr. Clark Research Association Dr. Clark Zentrum500 mg
- Vitamin B-1 500 mgVitalBulk500 mg
- Vitamin B-1 500 mgBest Naturals500 mg
- Vitamin B1 500 mgVitamatic500 mg
Have the amounts changed over the years?
Products whose current label entered DSLD in 2011 list a median of 5 mg; those entered in 2025, 5 mg.
| Year | Products | Median per serving |
|---|---|---|
| 2011 | 246 | 5 mg |
| 2012 | 754 | 7.5 mg |
| 2013 | 827 | 5 mg |
| 2014 | 490 | 3 mg |
| 2015 | 457 | 3 mg |
| 2016 | 449 | 5 mg |
| 2017 | 490 | 7.75 mg |
| 2018 | 398 | 2.5 mg |
| 2019 | 536 | 3 mg |
| 2020 | 900 | 5 mg |
| 2021 | 819 | 4 mg |
| 2022 | 934 | 3 mg |
| 2023 | 819 | 4.8 mg |
| 2024 | 918 | 5 mg |
| 2025 | 793 | 5 mg |
Source: DSLD label entry dates and amounts, current labels.
In which products and brands?
Products listing thiamin by DSLD product type
Brands listing it most: Douglas Laboratories (245), Nature's Way (221), Nature's Plus (207), Country Life (85), ProCaps Laboratories (79), Bronson (78), Rainbow Light (76), NOW (70), Metagenics (64), New Chapter (62).
Every product listing thiamin
10,123 products, A to Z by name (page 200 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Women's MultivitaminEvlution Nutrition20 mg
- Women's MultivitaminINNATE Response Formulas1.5 mg
- Women's MultivitaminX Gold Health1.5 mg
- Women's MultivitaminSwisse Ultivite22.03 mg
- Women's MultivitaminVimerson Health7 mg
- Women's Multivitamindr.bo7 mg
- Women's Multivitamin & MineralNatural Factors Whole Earth & Sea3.2 mg
- Women's Multivitamin & Mineral with 5-MTHFKirkman6 mg
- Women's Multivitamin 50 PlusGNC Women's50 mg
- Women's Multivitamin ActiveGNC Women's50 mg
- Women's Multivitamin Berry Citrus Flavored GummiesNew Chapter0.12 mg
- Women's Multivitamin Gummies Mixed Berry FlavoredRainbow Light · off the market1.8 mg
- Women's Multivitamin Health Formula with Calcium & Extra IronBasic Vitamins1.5 mg
- Women's Multivitamin PeachMary Ruth’s0.6 mg
- Women's Multivitamin Plus Stress SupportRainbow Light Vibrance · off the market25 mg
- Women's Multivitamin Sugar Free Gummies Strawberry FlavorLifeable0.05 mg
- Women's Multivitamin+Healths Harmony7 mg
- Women's Multivitamin/Multimineralup&up1.1 mg
- Women's Multivitamin/Multimineral Ultimate Women's 50+up&up · off the market1.1 mg
- Women's MultivitaminsAPOPTOSIS Nutraceuticals7 mg
- Women's Multivitamins & MineralsRise-N-Shine16.6 mg
- Women's NutrientsPure Encapsulations12.5 mg
- Women's Omega MultiCarlson3.4 mg
- Women's Once DailyVitaCeutical Labs25 mg
- Women's Once DailyVitamer Laboratories25 mg
- Women's Once DailyTN Trusted Nutrients25 mg
- Women's Once DailyGarden of Life MyKind Organics1.38 mg
- Women's Once Daily High Potency Multivitamin/MultimineralTrader Joe's25 mg
- Women's Once Daily MultiNatures Plus Source of Life Garden · off the market2.25 mg
- Women's Once Daily Multivitamin & MineralTrader Joe's25 mg
- Women's OneRainbow Light6 mg
- Women's One DailyPuritan's Pride1.5 mg
- Women's One DailyGoodSense1.5 mg
- Women's One DailyDG Health1.5 mg
- Women's One DailyFamily Wellness1.5 mg
- Women's One DailyCHK Nutrition1.5 mg
- Women's One DailyMegaFood1.5 mg
- Women's One DailyInnate Response Formulas1.5 mg
- Women's One DailyMeijer1.2 mg
- Women's One DailyVitamin Discount Center · off the market1.5 mg
- Women's One Daily California BlendMegaFood1.5 mg
- Women's One Daily MultivitaminMegaFood1.5 mg
- Women's One MultipleAN Amazing Nutrition Amazing Formulas25 mg
- Women's One MultivitaminRainbow Light · off the market20 mg
- Women's Perfect MultiPurity Products12 mg
- Women's PetitesBayer One A Day0.97 mg
- Women's Plant-Based Multi NutrientsCATALO4 mg
- Women's Plus MultiStartNatural Factors50 mg
- Women's Prenatal 1Bayer One A Day1.7 mg
- Women's PreNatal Pregnancy MultivitaminIntelligent Labs12 mg