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 202 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Xxtra Clean Herbal Cleanse Tropical FlavoredDetoxify0.6 mg
- Xxtra Clean Herbal Cleanse Tropical Fruit FlavorDetoxify Brand · off the market0.5 mg
- Xxtra Clean Herbal Cleanse Tropical Fruit FlavorDetoxify · off the market0.5 mg
- XyEssential Beginnings · off the market4 mg
- Y.P.D. Support FormulaDouglas Laboratories50 mg
- Yang EssentialsSun Ten10 mg
- Yeast Free B ComplexNew Sun100 mg
- Yeast Free Vegetarian MultiGNLD Nutritionals · off the market10 mg
- Yeast TherapyOnly Natural · off the market20 mg
- YeastMD PremiumPremium Certified0.8 mg
- Yellow Round Tablet Vitamin & MineralBronson · off the market20 mg
- Yoga VitaminsRise-N-Shine0.5 mg
- Young AdultCooper Complete1.5 mg
- Young Men's Multivitamin Plus Healthy SkinRainbow Light Vibrance · off the market30 mg
- Your 1 Daily NutritionCountry Life Realfood Organics2 mg
- Your Daily NutritionCountry Life Realfood Organics4 mg
- Your Life Multi Green SouceNature's Bounty25 mg
- Your Life Multi Green SourceNature's Bounty · off the market25 mg
- Your Life Multi Men's 45+Nature's Bounty · off the market1.5 mg
- Your Life Multi Men's 50+Nature's Bounty1.5 mg
- Your Life Multi PrenatalNature's Bounty · off the market1.8 mg
- Your Life Multi Prenatal Specialty FormulaNature's Bounty · off the market1.8 mg
- Your Life Multi Women's 45+Nature's Bounty · off the market1.5 mg
- Youthful Woman 40+ with B-ComplexLife Extension10 mg
- ZEssential Beginnings · off the market3 mg
- Z+Essential Beginnings · off the market25 mg
- Z-BecInternational Vitamin Corporation15 mg
- Z-PlexBronson Laboratories · off the market20 mg
- Z-PlexBronson20 mg
- Zalvit Tabletsnbgs PHARMA1.4 mg
- ZenWellPath6 mg
- Zen TherapyRainbow Light · off the market45 mg
- ZenapinRejuvica Health2 mg
- Zenapin-IRRejuvica Health0.4 mg
- Zero Carb Fat Incinerating SFO Graham CrackerVPX0.67 mg
- Zero Carb Fat Incinerating Zerotein Serious ChocolateVPX · off the market0.7 mg
- Zero Carb Fat Incinerating Zerotein StrawberryVPX · off the market0.85 mg
- Zero Carb Fat Incinerating Zerotein Vanilla DreamVPX · off the market0.67 mg
- Zero Carb Protein Powder Mango PeachISOPURE0.3 mg
- Zero Carb SRO Chocolate DreamVPX0.7 mg
- Zero Carb SRO Graham CrackerVPX1 mg
- Zero Carb SRO Serious ChocolateVPX1 mg
- Zero Carb SRO StrawberryVPX1 mg
- Zero Carb SRO Vanilla BlastVPX0.67 mg
- Zero Carb SRO Vanilla DreamVPX1 mg
- Zero Iron Hi-Potency Multi Vitamin-MineralWonder Laboratories10 mg
- zipfizz BerryZipfizz · off the market0.75 mg
- Zipfizz Berryzf Zipfizz0.6 mg
- Zipfizz Black CherryZipfizz0.75 mg
- Zipfizz Fruit PunchZipfizz · off the market0.75 mg