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 35 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Centrum MenGSK1.2 mg
- Centrum Men Under 50Centrum1.2 mg
- Centrum Men's MultiCentrum1.3 mg
- Centrum minis Adults 50+Centrum1.5 mg
- Centrum Minis Men 50+Centrum1.5 mg
- Centrum Minis Women 50+Centrum1.1 mg
- Centrum Multi + Omega-3 Men 50+Centrum1.5 mg
- Centrum Multi + Omega-3 Women 50+Centrum1.1 mg
- Centrum Multi + Probiotics Adults 50+Centrum0.8 mg
- Centrum Silver Adults 50+Centrum1.5 mg
- Centrum Silver Adults 50+GSK1.5 mg
- Centrum Silver Chewables Adults 50+ Citrus BerryCentrum2.2 mg
- Centrum Silver Chewables Citrus BerryCentrum2.2 mg
- Centrum Silver Men 50+Centrum1.5 mg
- Centrum Silver Men 50+GSK1.5 mg
- Centrum Silver Plus VisionCentrum1.5 mg
- Centrum Silver Women 50+Centrum1.1 mg
- Centrum Silver Women 50+GSK1.1 mg
- Centrum Specialist EnergyCentrum4.5 mg
- Centrum Specialist Energy MultivitaminCentrum4.5 mg
- Centrum Specialist HeartCentrum0.75 mg
- Centrum Specialist Heart MultivitaminCentrum0.8 mg
- Centrum Specialist PrenatalCentrum1.4 mg
- Centrum Specialist VisionCentrum1.5 mg
- Centrum Stress & MoodCentrum1.2 mg
- Centrum VitaMintsCentrum1.2 mg
- Centrum VitaMints RaspberryCentrum1.2 mg
- Centrum VitaMints WintergreenCentrum1.2 mg
- Centrum WomenCentrum1.1 mg
- Centrum Women Under 50Centrum1.1 mg
- Centrum Women's MultiCentrum1.2 mg
- CenturySafeway Care1.5 mg
- Century AdultSmart Sense1.5 mg
- Century AdultsSignature Care1.5 mg
- Century CompleteTop Care1.5 mg
- Century Complete Multivitamin/Multimineral SupplementEqualine1.5 mg
- Century FormulaSwanson Premium Brand · off the market2.3 mg
- Century Formula Without IronSwanson Premium Brand · off the market2.3 mg
- Century MatureSmart Sense1.5 mg
- Century MatureGoodSense1.5 mg
- Century MatureSignature Care1.5 mg
- Century MatureMeijer1.5 mg
- Century menSignature Care1.2 mg
- Century Men'sEqualine1.2 mg
- Century Senior 50+ FormulaSafeway Care1.5 mg
- Century Senior Ultimate Men'sTop Care1.5 mg
- Century Ultimate Men'sTop Care1.2 mg
- Century Ultimate Men's Senior FormulaSafeway Care1.5 mg
- Century Ultimate Women'sTop Care1.1 mg
- Century WomenGoodSense1.1 mg