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 190 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Vitamin B-1 100 mg CapsuleVitalBulk · off the market100 mg
- Vitamin B-1 100 mg High Potency Thiamin HClNature's Way100 mg
- Vitamin B-1 100 mg SupplementNature Made100 mg
- Vitamin B-1 100 mg Thiamin HClNature's Way · off the market100 mg
- Vitamin B-1 250 mgVitamin World · off the market250 mg
- Vitamin B-1 250 mgPuritan's Pride250 mg
- Vitamin B-1 250 mgIndiana Botanic Gardens250 mg
- Vitamin B-1 250 mgVitalBulk250 mg
- Vitamin B-1 250 mg CapsuleVitalBulk · off the market250 mg
- Vitamin B-1 300 mgNature's Plus · off the market300 mg
- Vitamin B-1 300 mgGNC300 mg
- Vitamin B-1 50 mgRugby50 mg
- Vitamin B-1 50 mgVitalBulk50 mg
- Vitamin B-1 500 mgVitalBulk500 mg
- Vitamin B-1 500 mgBest Naturals500 mg
- Vitamin B-1 500 mg CapsuleVitalBulk · off the market500 mg
- Vitamin B-1 Thiamin HClVoitenko Wellness · off the market100 mg
- Vitamin B-1 Thiamine 100 mgMartin Avenue Pharmacy100 mg
- Vitamin B-100Radiance100 mg
- Vitamin B-100OL Olympian Labs · off the market100 mg
- Vitamin B-100Nature's Blend100 mg
- Vitamin B-125 ComplexSwanson Premium Brand · off the market125 mg
- Vitamin B-50Safeway Care50 mg
- Vitamin B-50OL Olympian Labs50 mg
- Vitamin B-50 B-ComplexRite Aid50 mg
- Vitamin B-50 ComplexBIOVEA50 mg
- Vitamin B-50 Complex 50 mgBIOVEA50 mg
- Vitamin B-ComplexDouglas Laboratories50 mg
- Vitamin B-ComplexPlus Pharma3 mg
- Vitamin B-ComplexOptimum2 mg
- Vitamin B-ComplexDivine Bounty100 mg
- Vitamin B-ComplexNaturaLife Labs100 mg
- Vitamin B-ComplexKirkman7 mg
- Vitamin B-Complex 100Solaray100 mg
- Vitamin B-Complex 100 mgMartin Avenue Pharmacy100 mg
- Vitamin B-Complex 50Solaray50 mg
- Vitamin B-Complex 50 mgSolaray50 mg
- Vitamin B-Complex 75 Timed ReleaseSolaray75 mg
- Vitamin B-Complex with Vitamin CBronson50 mg
- Vitamin B-Complex with Vitamin CFuturebiotics50 mg
- Vitamin B1Whole Foods100 mg
- Vitamin B1Herb-Science6 mg
- Vitamin B1Earthborn Elements525 mg as transcribed, likely a slip
- Vitamin B1 (Thiamin) 100 mgSolgar100 mg
- Vitamin B1 (Thiamine Mononitrate)BulkSupplements.com92 mg
- Vitamin B1 100 mgBronson Laboratories100 mg
- Vitamin B1 100 mgExchange Select X · off the market100 mg
- Vitamin B1 100 mgFoods Plus · off the market100 mg
- Vitamin B1 100 mgThe Vitamin Shoppe100 mg
- Vitamin B1 100 mgAvPak · off the market100 mg