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The following doses have been studied in scientific research:
BY MOUTH:
- For thiamine deficiency: The usual dose of thiamine is 5-30 mg daily in either a single dose or divided doses for one month. The typical dose for severe deficiency can be up to 300 mg per day.
- For reducing the risk of getting cataracts: A daily dietary intake of approximately 10 mg of thiamine has been used.
- For kidney damage in people with diabetes (diabetic nephropathy): 100 mg of thiamine three times daily for 3 months has been used.
- For menstrual cramps (dysmenorrhea): 100 mg of thiamine, alone or along with 500 mg of fish oil, has been used daily for up to 90 days.
As a dietary supplement in adults, 1-2 mg of thiamine per day is commonly used. The daily recommended dietary allowances (RDAs) of thiamine are: Infants 0-6 months, 0.2 mg; infants 7-12 months, 0.3 mg; children 1-3 years, 0.5 mg; children 4-8 years, 0.6 mg; boys 9-13 years, 0.9 mg; men 14 years and older, 1.2 mg; girls 9-13 years, 0.9 mg; women 14-18 years, 1 mg; women over 18 years, 1.1 mg; pregnant women, 1.4 mg; and breast-feeding women, 1.5 mg.
BY INJECTION:
- For a brain disorder caused by low levels of thiamine (Wernicke-Korsakoff syndrome): Healthcare providers give shots containing 5-200 mg of thiamine once daily for 2 days. *
How administered:
Thiamine, vitamin B1 may be administered without regard to meals. *
