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 70 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Gold Standard Pre-Workout Blueberry LemonadeON Optimum Nutrition2 mg
- Gold Standard Pre-Workout Blueberry LemonadeOptimum Nutrition2 mg
- Gold Standard Pre-Workout Fruit PunchOptimum Nutrition2 mg
- Gold Standard Pre-Workout Strawberry LimeON Optimum Nutrition2 mg
- Gold Standard Pro Gainer Double ChocolateON Optimum Nutrition0.31 mg
- Gold TabletsNature's Plus Source of Life · off the market30 mg
- Golden Supreme Mega Vitamin/MineralJeunique · off the market40 mg
- Golden YearsNatures Plus · off the market25 mg
- GoldenLifePrincess Lifestyle2 mg
- GolferAid Sports Performance Island CitrusGOLFERAID1.2 mg
- Goliath Multi VitaminGoliath Labs50 mg
- GoodSport Wild BerryGoodSport0.1 mg
- Gorilla Mode Tequila SunriseGorilla Mind1.2 mg
- Gourmet Pro Chocolate CaramelMM Sports Nutrition0.375 mg
- Gourmet Pro Chocolate Fudge BrownieMM Sports Nutrition0.375 mg
- Gourmet Pro Vanilla Caramel SwirlMM Sports Nutrition0.375 mg
- Gourmet VanillaDymatize Nutrition · off the market0.8 mg
- Gout OutBio Nutrition3 mg
- Grape Cleansing LiquidPurified Brand2.5 mg
- Grass-Fed, Certified rBGH-Free Whey Protein Powder ChocolateSwanson Ultra · off the market0.15 mg
- Grass-Fed, Certified rBGH-Free Whey Protein Powder StrawberrySwanson Ultra · off the market0.15 mg
- Grass-Fed, Certified rBGH-Free Whey Protein Powder VanillaSwanson Ultra · off the market0.15 mg
- Great HairVitabase30 mg
- Green and RedNatures Plus Source of Life · off the market25 mg
- Green and RedNaturesPlus Source of Life25 mg
- Green and Red Mini-TabsNature's Plus Source of Life · off the market25 mg
- Green Barley Grass 500 mgGood 'N Natural · off the market0.15 mg
- Green Clean Herbal Cleanse Honey Tea FlavorDetoxify0.38 mg
- Green PowerGreens Today2.5 mg
- Green Power FormulaGreens Today · off the market2.5 mg
- Green SourceRadiance25 mg
- Green SourceGood 'N Natural · off the market25 mg
- Green SourceWonder Laboratories25 mg
- Green SourceDC25 mg
- Green SourcePuritan's Pride25 mg
- Green Source Iron FreePuritan's Pride25 mg
- Green Source Multi Vitamins & MineralsVitamin World25 mg
- Green Source Multivitamin & MineralsVitamin World25 mg
- Green Superfood Energy Tropical FlavorAmazing Grass1.2 mg
- Green Superfood Hydrate Strawberry Lemonade FlavorAmazing Grass1.2 mg
- Green Superfood Lemon-Lime FlavorAmazing Grass1.2 mg
- Green Superfood Multivitamin Pineapple LemongrassAmazing Grass0.75 mg
- Green SuperFood Pineapple Lemongrass FlavorAmazing Grass · off the market0.75 mg
- Green Superfood Powder Sweet GreensNutrilite Organics0.6 mg
- Green SuperFood Raw ReserveAmazing Grass0.0004 mg as transcribed, likely a slip
- GreensCatie's · off the market35 mg
- Greens + Reds Mixed BerryMillecor1 mg
- Greens + Reds Natural OrangeSwolverine0.2 mg
- GREENS Arnold PalmerCore Nutritionals1.2 mg
- GREENS Berry BlissCore Nutritionals1.2 mg