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 173 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Thermo-RevNeon Sport10 mg
- ThermofastEST15 mg
- ThermogenicSlim Science · off the market1.25 mg
- Thermogenic Energy FactorsCalifornia Academy of Health10 mg
- Thermogenic Oxy BurniPro Organic Supplements · off the marketin a blend
- ThermoplusAdvocare3 mg
- Thermovex Cherry OrangeEVOchem1.5 mg
- Thermovex Green Apple SmashEVOchem Nutrition1.5 mg
- Thermovex Mango LemonadeEVOchem Nutrition1.5 mg
- Thermovex Mango Pink Lemon SqueezeEVOchem Nutrition1.5 mg
- Thiamin 100 mgCelebrate100 mg
- Thiamin 50Biotics Research Corporation50 mg
- Thiamin 50 mgSeeking Health50 mg
- Thiamin Vitamin B-1 100 mgGeri-Care100 mg
- Thiamin Vitamin B1 100 MilligramsNutraBio100 mg
- Thiamine 50 mgSeeking Health · off the market50 mg
- Thiamine HClBulkSupplements.com100 mg
- Thiamine HCl (Vitamin B1)BulkSupplements.com100 mg
- Thiamine HCl Powder 100 mgBulkSupplements.com100 mg
- Thiamine MononitrateBulkSupplements.com101 mg
- Thiamine Mononitrate 200 mgBulkSupplements.com162 mg
- Thiamine Mononitrate Vitamin B1 Powder 200 mgBulkSupplements.com162 mg
- Thiamine-250 TRMBi Nutraceuticals250 mg
- ThickGene.In.Us.Brain15 mg
- Think ClearlySuperNutrition · off the market51 mg
- ThreeLac CapsGlobal Health Trax0.6 mg
- ThreeLac ProbioticGlobal Health Trax0.4 mg
- ThriveEu Natural15 mg
- Thrive MLe-Vel1.4 mg
- Thrive Vanilla Lifestyle MixLe-Vel0.75 mg
- Thrive WLe-Vel1.4 mg
- Thrivite 19 TabletsMethod Pharmaceuticals3 mg
- Thrivite Rx TabletsMethod Pharmaceuticals3 mg
- Thyro-DineWonder Laboratories12.5 mg
- Thyro-GenDC12.5 mg
- Thyro-Max SupportCountry Life30 mg
- Thyroid ActionPuritan's Pride25 mg
- Thyroid ComplexVitamin World25 mg
- Thyroid ComplexPuritan's Pride25 mg
- Thyroid ComplexBotanic Choice50 mg
- Thyroid ComplexIndiana Botanic Gardens50 mg
- Thyroid ComplexThe Vitamin Shoppe10 mg
- Thyroid ComplexBioCare10 mg
- Thyroid EssentialsSwanson Condition Specific Formulas · off the market25 mg
- Thyroid EssentialsSwanson25 mg
- Thyroid PlusPriority One Nutritional Supplements30 mg
- Thyroid SupportPriority One Nutritional Supplements30 mg
- Thyroid Support FormulaPhysioLogics · off the market25 mg
- ThyroLife OptimaDouglas Laboratories25 mg
- Time Fighters for MenPhysician's Signature · off the market50 mg