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Vitamin B1 (thiamin)
Full ranking Dose tool Products (4,416)
Key facts
Daily Value (US FDA)1.2 mg
Tolerable Upper Intake Level (UL)—
Median（Per day）5 mgP5 0.14 – P95 100
Products4,416
Sources: https://ods.od.nih.gov/factsheets/Thiamin-HealthProfessional/ · FDA DV 1.2 mg (https://www.fda.gov/food/nutrition-facts-label/daily-value-nutrition-and-supplement-facts-labels); pre-2016 DV [1.5] (https://www.federalregister.gov/documents/2016/05/27/2016-11867/food-labeling-revision-of-the-nutrition-and-supplement-facts-labels); no UL set; hard_high=1000 per serving (UL x10 or market maximum), hard_low=DV/1000
Daily dose across products（mg/day）
DV 1.2
0.035 mglog scale · n=4,416375 mg
Label data from official national databases and brand websites, as declared; not lab-verified.
Common forms
| Form | Products | Median | P5–P95 | Elemental fraction |
|---|---|---|---|---|
| Thiamin HCl | 2107 | 10 mg | 0.38 – 125 | — |
| Thiamin mononitrate | 1268 | 2.5 mg | 0.05 – 100 | — |
| Benfotiamine | 142 | 50 mg | 3 – 150 | — |
Top ranked
| Rank | Brand | Product | Per day | Score |
|---|---|---|---|---|
| 1 | Swanson | Vitamin B1 100 mg | 100 mg | 90.0 |
| 2 | Vitamin World | B-1 250 mg | 250 mg | 88.0 |
| 2 | CVS Health | B1 100 mg | 100 mg | 88.0 |
| 2 | Nature's Bounty | Vitamin B-1 100 mg | 100 mg | 88.0 |
| 2 | The Vitamin Shoppe | Vitamin B1 100 mg | 100 mg | 88.0 |
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.