Vitamin
Vitamin B1 (Thiamine)
Also known as: Thiamine, Thiamin, Aneurin, Vitamin B1
Thiamine is an essential B-vitamin that functions as a coenzyme in carbohydrate and amino acid metabolism. Thiamine HCl is a stable, highly bioavailable form.
Daily target & upper limit
1.2 mg / dayVitamin B1 (Thiamine) has an established daily reference intake. See best forms, label synonyms, upper-limit warnings, and top-scoring supplements:
Vitamin B1 (Thiamine) dosage reference →Primary uses
- Energy metabolism
- Nerve function
- Carbohydrate metabolism
- Energy metabolism (carbohydrate and branched-chain amino acid oxidation)
- Nervous system function and myelin formation
- Cognitive function
- Deficiency prevention (Wernicke-Korsakoff syndrome)
How it works
- Cofactor for pyruvate dehydrogenase
- Essential for acetyl-CoA production
- Supports nerve membrane function
Dosage
- Typical range
- 25-100 mg daily
- Timing
- With food
- With food
- Yes
- Duration
- Safe long-term
- Special populations
- Alcoholics at high risk of deficiency
Forms
- Thiamine HCl
- Benfotiamine
- thiamine mononitrate· 70/100
- benfotiamine (lipophilic form)· 70/100
Safety
Common side effects
- Very safe
Contraindications
- None
Products containing Vitamin B1 (Thiamine)
Top-scoring supplements in our catalog that list Vitamin B1 (Thiamine) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Essential B vitamin
Grade A: Multiple well-designed human trials support the main claims.
Related in Vitamin
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Open the checkerMedical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.