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 31 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Boost French VanillaGreens First0.6 mg
- BoostNRGRightWay Nutrition · off the market8 mg
- BoozAidLa Canada Ventures60 mg as transcribed, likely a slip
- Botanicals TranquilitySymmetry1.5 mg
- Bowelsyl +BioPerineApproved Science2 mg
- BP PackDouglas Laboratories50 mg
- BrainDaily Sprays5 mg
- Brain & Focus for Teens & AdultsRainbow Light · off the market23 mg
- Brain & Focus MultivitaminRainbow Light · off the market22.5 mg
- Brain & VisionFocus Factor3 mg
- Brain BoostRelacore15 mg
- Brain Boost ComplexSMNutrition3 mg
- Brain BoosterRainbow Nutrients · off the market3 mg
- Brain Booster UltraRomeo Health3 mg
- Brain Cell Respirator PlusBioactive Nutritional1 mg
- Brain ChargeSource Naturals15 mg
- Brain FoodSNAP3 mg
- Brain Formula Neuro PlusMillecor3 mg
- Brain FuelP2Life3 mg
- Brain GoddessWarp Wellness3 mg
- Brain MoodDouglas Laboratories15 mg
- Brain PlusArazo Nutrition3 mg
- Brain ProductivityNooCube1.1 mg
- Brain SupportNatures Plus AgeLoss · off the market0.275 mg
- Brain SupportEnvy Nutrition3 mg
- Brain SupportNaturesPlus AgeLoss0.28 mg
- Brain Support Supplement 1000 mgNature's Nutrition3 mg
- Brain Total HealthMartin Avenue Pharmacy50 mg
- Brain VitaminsBuilt By Nature3 mg
- Brain WellnessBio Nutrition10 mg
- BrainAidNutriCology7.5 mg as transcribed, likely a slip
- BrainolConsumer Health10 mg
- BrainSpeed MemoryNatrol50 mg
- BrainStormAllergy Research Group7.5 mg
- BrainSustain Creamy ChocolateXYMOGEN EP · off the market50 mg
- Brewer's YeastVitamin World0.12 mg
- Brewer's YeastGood 'N Natural · off the market0.1 mg
- Brewer's YeastNature's Answer0.15 mg
- Brewer's YeastThe Vitamin Shoppe0.47 mg
- Brewer's Yeast 1000 mgSpring Valley0.1 mg
- Brewer's Yeast 500GNC · off the market0.4 mg
- Brewer's Yeast 500 mgGNC · off the market0.4 mg
- Brewer's Yeast 500 mgSwanson Premium Brand · off the market0.14 mg
- Brewer's Yeast 500 mgAN Amazing Nutrition Amazing Formulas0.1 mg
- Brewer's Yeast 500 mgBest Naturalsin a blend
- Brewer's Yeast 500 mgPure Naturals0.1 mg
- Brewer's Yeast 680 mgMajor0.6 mg
- Brewer's Yeast 7 1/2 grainVitamin World · off the market0.12 mg
- Brewer's Yeast 7 1/2 Grains With Vitamin B 12Solgar · off the market0.28 mg
- Brewer's Yeast 7 1/2 grains with Vitamin B12Solgar0.28 mg