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 93 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Magnesium MalateVinco's · off the market25 mg
- Magnesium MalateVinco25 mg
- MagnesixDouglas Laboratories · off the market10 mg
- Magnesix Magnesium And B-6Douglas Laboratories10 mg
- Magnum-75 Multi-Vitamin FormulaWindmill75 mg
- Magnus SupremeOmniLife1.5 mg
- MagRes + ProbioticPurity Products10 mg
- MagSenseNatural Factors WS WomenSense25 mg
- MagSense Magnesium Glycinate FormulaNatural Factors WomenSense · off the market25 mg
- Male LongevityVitarol · off the market30 mg
- Male MultinutrientBioCare25 mg
- Male MultipleSolgar56 mg
- Male Super PackDouglas Laboratories54 mg
- Male VigorBodyHealth30 mg
- Malibu MiracleExotic OxyJuice0.075 mg
- Malibu Miracle MaintenanceDreamQuest Nutraceuticals · off the market0.27 mg
- Malic Acid 1500 mg with MagnesiumKAL7.5 mg
- Malic Acid With MagnesiumKAL7.5 mg
- MalicMag ComplexFoster Regal50 mg
- MalicMaxWonder Laboratories50 mg
- Malt ExtractGM Germa3 mg
- Mama BirdBest Nest Wellness2.5 mg
- Mandarin OrangeAdvoCare3 mg
- Manetabolism PlusThe Mane Choice5 mg
- Manga-CalDC5 mg
- MangaplexPL Progressive Laboratories5 mg
- MangaPlexWonder Laboratories5 mg
- Marathon FormulaNutrina · off the market600 mg as transcribed, likely a slip
- Marine Coral Calcium ComplexCORALadvantage · off the market0.96 mg
- Marnatal-FMarnel3 mg
- Marvel The Amazing Spider-Man CompleteSundown0.75 mg
- MasonatalMason Natural1.8 mg
- Mass Tech Extreme 2000 Triple Chocolate BrownieMuscleTech Performance Series1.5 mg
- MASS TECH Extreme 2000 Vanilla MilkshakeMuscleTech Performance Series1.8 mg
- Mass Tech VanillaMuscleTech1.53 mg
- Mass-TechMuscleTech0.75 mg
- Mass-Tech Strawberry MilkshakeMuscleTech0.75 mg
- Master Cleanse Lemonade DietpHion Balance0.15 mg
- Master FormulaPrimal Blueprint150 mg
- Masters Complete Men 50+SmartyPants · off the market0.15 mg
- Masters Complete Women 50+SmartyPants · off the market0.15 mg
- Masters Formula Women 50+SmartyPants0.24 mg
- Maternal SymmetryVitanica8 mg
- Mature FormulaBronson Laboratories · off the market3 mg
- Mature FormulaBronson3 mg
- Mature Formula Multivitamin & MineralBronson3 mg
- Mature Formula without IronBronson3 mg
- Mature MultiSimply Right · off the market1.5 mg
- Mature MultiTN Trusted Nutrients1.5 mg
- Mature MultiKirkland Signature · off the market1.5 mg