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 40 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Cholesterol EssentialsSwanson7 mg
- Cholesterol PlusBayer One A Day1.5 mg
- Cholesterol Rx SupportVinco · off the market5 mg
- Cholesterol Script SupportVinco5 mg
- Choline CocktailTwinlab1.5 mg
- Choline With B-ComplexTerry Naturally25 mg
- Cholo-PakDouglas Laboratories17 mg
- Cholo-SYNDouglas Laboratories25 mg
- ChromeMateDiatrix Diet3.4 mg
- ChromeMateOfficial HCG Diet Plan3.4 mg
- ChromeMateInfiniti Creations3.4 mg
- Chromium ComplexSimplySupplements4 mg
- Chromium ComplexSimply Supplements4.5 mg
- Cinnamon Rollin'Swee2ooth · off the market0.15 mg
- Cir-Q TonicVerVita5 mg
- CircuPlex 1500Indiana Botanic Gardens · off the market100 mg
- CircuPlus 1500Indiana Botanic Gardens100 mg
- CircuPlus 1500Botanic Choice100 mg
- CitraNatal 90 DHA Prenatal TabletsMission Pharmacal CitraNatal3 mg
- CitraNatal 90 DHA Rx Prenatal Supplement TabletMission Pharmacal CitraNatal3 mg
- CitraNatal 90 DHA Rx Prenatal TabletMission Pharmacal CitraNatal3 mg
- CitraNatal Assure Prenatal TabletMission Pharmacal CitraNatal3 mg
- CitraNatal Assure Prenatal Vitamin TabletMission Pharmacal CitraNatal3 mg
- CitraNatal Assure Rx Prenatal Supplement TabletMission Pharmacal CitraNatal3 mg
- CitraNatal Assure Rx Prenatal TabletMission Pharmacal CitraNatal3 mg
- CitraNatal DHA Prenatal TabletMission Pharmacal CitraNatal3 mg
- CitraNatal DHA Prenatal Vitamin TabletMission Pharmacal CitraNatal · off the market3 mg
- CitraNatal RxMission Pharmacal CitraNatal3 mg
- Citrate Formula Basic Nutrients III Without Copper And IronThorne Research · off the market40 mg
- Citrate Formula Basic Nutrients IV With Copper And IronThorne Research · off the market6.5 mg
- CitriBoostShaklee1.5 mg
- Clarity Daily NootropicThrivous25 mg
- Clarity Natural Berry FlavorTransformations Medical Weight Loss2 mg
- Clark All-in-OneDr. Clark Research Association Dr. Clark Zentrum40 mg
- Clarocet CSClarocet · off the market0.75 mg
- Clarocet ERTClarocet · off the market0.75 mg
- Clarocet NRIClarocet · off the market0.75 mg
- Clarocet PMClarocet · off the market0.5 mg
- ClassicReliv3 mg
- Classic PrenatalRugby1.8 mg
- Clean Energy Natural Citrus FlavorAIVIA0.5 mg
- Clean Pre Workout Raspberry Lemonade FlavorTrace Minerals Research0.23 mg
- Clean SlateReset/36010 mg
- CleanseWellthy Nutraceuticals5 mg
- Clear AirwaysVitinity · off the market18 mg
- Clear Change Daily EssentialsMetagenics10 mg
- Clear Ear ComplexIndiana Botanic Gardens · off the market10 mg
- Clear Ear ComplexBotanic Choice10 mg
- Clear Nails Plusnutra4health · off the market6 mg
- Clear Response VanillaInnate Response Formulas2 mg