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 18 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Awesome AbsAwesomeAbs4Life · off the market4 mg
- AxionXyngular2.5 mg
- AxisCombine X · off the market1.8 mg
- Axis 2015Combine2 · off the market1.26 mg
- Axis Endo (formerly Estrium) Mango FlavorMetagenics · off the market0.75 mg
- Axis Endo Mango FlavorMetagenics0.75 mg
- AzesChew Strawberry FlavorBasiem1.4 mg
- Azesco TabletsSolubiomix1.4 mg
- AZV Multi VitaminSystemic Formulas Bio Nutriment20 mg
- B 100 ComplexSunmark100 mg
- B 100 ComplexThompson100 mg
- B 100 ComplexSundown Naturalist100 mg
- B 100 ComplexSpring Valley100 mg
- B 50 ComplexThompson50 mg
- B 50 ComplexSpring Valley50 mg
- B 50 ComplexVitalBulk50 mg
- B 50 Complex Niacin & Niacinamide FreeVitalBulk50 mg
- B 50 Complex Niacin & Niacinimide FreeVitalBulk · off the market50 mg
- B 50 Complex Timed-ReleaseSpring Valley50 mg
- B ActivXYMOGEN20 mg
- B Beet Energizer Watermelon FlavorBiochem0.27 mg
- B CompleetCarlson10 mg
- B Compleet 100Carlson100 mg
- B Compleet 50Carlson50 mg
- B Complete High PotencyBuried Treasure Liquid Nutrients · off the market50 mg
- B Complete High PotencyBuried Treasure Nutritionals50 mg
- B ComplexZahler · off the market100 mg
- B ComplexThompson9.5 mg
- B ComplexWeCare Naturally110 mg
- B ComplexPharmax60 mg
- B ComplexSundown Naturals · off the market1.5 mg
- B ComplexAmazon Elements · off the market1.8 mg
- B ComplexRugby · off the market3 mg
- B ComplexSundown1.5 mg
- B ComplexNew Sun100 mg
- B ComplexAdaptogen Research15 mg
- B ComplexCalifornia Natural · off the market1.5 mg
- B ComplexCHK Nutrition50 mg
- B ComplexInnate Response Formulas9 mg
- B ComplexNATURELO Premium Supplements5 mg
- B ComplexBioCare50 mg
- B ComplexNature's Blend3 mg
- B ComplexWindmill1.2 mg
- B ComplexCarlson50 mg
- B Complex & Vitamin C 500 mg USPEqualine10 mg
- B Complex 100 mgVitaCeutical Labs100 mg
- B Complex 100 mgLuckyVitamin100 mg
- B Complex 50 mgVitaCeutical Labs50 mg
- B Complex 50 mgFull Circle50 mg
- B Complex 50 mgLuckyVitamin50 mg