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 68 of 203), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- GenEssentials GreensGenesis Today0.03 mg
- Genicin Vita-Q7T Pharma25 mg
- Genicin Vita-S7T Pharma1.5 mg
- Genius GamerThe Genius Brand0.4 mg
- Genius JoyThe Genius Brand1.5 mg
- Gentle MultipleBluebonnet Early Promise Prenatal5 mg
- Geramin B12Medicinas Rosario3.2 mg
- Geri-Freeda Senior FormulaFreeda15 mg
- Geri-Vite 25Douglas Laboratories · off the market25 mg
- Geriatric Biochemical with GinsengBiokemical1.5 mg
- Geritol CompleteMeda Consumer Healthcare · off the market1.5 mg
- Geritol LiquidGeritol2.5 mg
- Geritol With Ferrex 18 TonicMeda Consumer Healthcare · off the market2.5 mg
- Geromulti Without IronSwanson Premium Brand · off the market1.5 mg
- Get Healthy VitaminsRise-N-Shine · off the market33 mg
- GI CLeanse Protein Powder Vanilla DelightNHC Natural Healthy Concepts15 mg
- GI DeFlame Creamy ChocolateWoodstock Vitamins15 mg
- GI Meal Select ChocolateMoss Nutrition2 mg
- GI SustainMetagenics0.5 mg
- Ginkgo 120 plus Ginseng 200ProCaps Laboratories10 mg
- Ginkgo 120 plus Ginseng 200ProCaps10 mg
- Ginkgo Biloba 120ProCaps Laboratories5 mg
- Ginkgo Biloba 120ProCaps5 mg
- Ginseng 200ProCaps Laboratories5 mg
- Ginseng 200ProCaps5 mg
- Ginseng 40.0Shot-B · off the market10 mg
- Glan-Plus-FNutri-West15 mg
- Glandular SystemNature's Sunshine10 mg
- GleeWellgenix · off the market2.5 mg
- GlowEu Natural7 mg
- GlowAPOPTOSIS Nutraceuticals6 mg
- Glow Hair & NailsAdvoCare1.5 mg
- Gluco BenefitsDaVinci Benefits Line75 mg
- Gluco ComplexBioCare10 mg
- Gluco Total HealthMartin Avenue Pharmacy50 mg
- Gluco-FactorsMetagenics100 mg
- Gluco-ResponseNuMedica100 mg
- Gluco-ScienceSource Naturals8 mg
- Gluco-Support FormulaDouglas Laboratories37.5 mg
- GlucoBalanceBiotics Research Corporation50 mg
- GlucocilNeuliven Health4 mg
- GlucoformGlobal Enzyme · off the market0.5 mg
- GlucoManage FormulaTriVita17 mg
- GlucomannanOfficial HCG Diet Plan3.4 mg
- GlucomannanInfiniti Creations3.4 mg
- GlucoPackDouglas Laboratories75 mg
- GlucoRexNewtonEverett8 mg
- Glucose BalanceProtocol For Life Balance8 mg
- Glucose Care with Cinnulin PFPatient One MediNutritionals · off the market50 mg
- Glucose Care with Cinnulin PFPatient One 1 MediNutritionals50 mg