The recommended dietary allowance (RDA) for vitamin B1 (thiamine) varies by age, sex, and life stage to support energy metabolism and nerve function.
Adult Dosages
Adult males require 1.2 mg daily, while adult females need 1.1 mg daily. Pregnant or breastfeeding women should aim for 1.4 mg per day to meet increased demands.
Children's Dosages
Children aged 1-3 years need 0.5 mg daily, 4-8 years require 0.6 mg, and 9-13 years need 0.9 mg. Infants under 6 months have an adequate intake of 0.2 mg, rising to 0.3 mg for 7-12 months.
Therapeutic Doses
For deficiency conditions like beriberi, higher doses apply, such as 10-50 mg daily orally or via injection until recovery. No upper limit exists due to low toxicity risk, but exceeding 100-300 mg daily without medical advice risks mild side effects like nausea.
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