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 60 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Estro Support21st Century2 mg
- Estro Support ES21st Century5 mg
- EstrofemHi-Tech Pharmaceuticals5 mg
- Estrogen EnhancementSkinnyBean1.25 mg
- EstroPrimeAllergy Research Group8 mg
- Eternal Lean Weight Loss SupplementNature's Plus · off the market1.5 mg
- EveNOW · off the market25 mg
- Eve Iron-Free CapsulesNOW25 mg
- Eve SoftgelsNOW25 mg
- Eve TabletsNOW25 mg
- Ever Clean Herbal Cleanse Honey Tea FlavorDetoxify · off the market0.188 mg
- Every Day CleanseHealth Plus10 mg
- Every ManNew Chapter Organics · off the market4 mg
- Every Man MultivitaminNew Chapter4 mg
- Every Man One Daily MultiNew Chapter · off the market1.5 mg
- Every Man's One DailyNew Chapter Organics1.5 mg
- Every Man's One Daily MultiNew Chapter1.2 mg
- Every Man's One Daily MultivitaminNew Chapter1.2 mg
- Every Man's One Daily Multivitamin 55+New Chapter1.6 mg
- Every Man's One Daily Whole-Food MultivitaminNew Chapter1.2 mg
- Every WomanNew Chapter Organics · off the market4 mg
- Every Woman MultivitaminNew Chapter4 mg
- Every Woman's One DailyNew Chapter Organics1.5 mg
- Every Woman's One Daily MultiNew Chapter1.5 mg
- Every Woman's One Daily MultivitaminNew Chapter1.2 mg
- Every Woman's One Daily Multivitamin 40+New Chapter1.6 mg
- Every Woman's One Daily Whole-Food MultivitaminNew Chapter1.2 mg
- Every Women's One Daily MultiNew Chapter · off the market1.5 mg
- Everyday Energy FormulaCATALO0.8 mg
- Everyday Multi-VitaminKirkman3 mg
- EveryDay Multi-Vitamin W/O Vitamins A & DKirkman3 mg
- Everyday MultivitaminKirkman · off the market3 mg
- Everyday Multivitamin without A & DKirkman3 mg
- EvoviteEvogen15 mg
- Evovite Orange MangoEvogen Naturals13 mg
- EVP GrapeEvogen0.75 mg
- ExaktaD'Adamo Personalized Nutrition3.75 mg
- Executive Stress FormulaDouglas Laboratories Ultra Preventive 2000 Series · off the market50 mg
- Executive Stress FormulaDouglas Laboratories37.5 mg
- Exotic Red Super Fruits Adult's Multi-Vitamin Chewable Exotic Red Berry FlavorNature's Plus · off the market15 mg
- Exotic Red Super Fruits Adult's Multi-Vitamin Exotic Red Berry FlavorNature's Plus · off the market15 mg
- Extend CoreVitamin Research Products7.5 mg
- Extend PlusVitamin Research Products65 mg
- Extended Delivery Energy ShotNature's Plus Source of Life · off the market3 mg
- External LeanNatures Plus · off the market1.5 mg
- Extra Joss Extra EnergyBintang Toedjoe · off the market1.2 mg
- Extra NutrientsThorne Research · off the market40 mg
- Extra NutrientsThorne · off the market40 mg
- Extra Strength EstrovenEstroven5 mg
- Extra Strength Hair, Skin & NailsSpring Valley5 mg