Thiamin (thiamine), vitamin B1

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Dosing

The below doses are based on scientific research, publications, traditional use, or expert opinion. Many herbs and supplements have not been thoroughly tested, and safety and effectiveness may not be proven. Brands may be made differently, with variable ingredients, even within the same brand. The below doses may not apply to all products. You should read product labels, and discuss doses with a qualified healthcare provider before starting therapy.

Adults (18 years and older)

The U.S. Recommended Daily Allowance (RDA) for adults ages 19 years and older is 1.2 milligrams daily for males and 1.1 milligrams daily for females, taken by mouth. The RDA for pregnant or breastfeeding women of any age is 1.4 milligrams daily, taken by mouth. As a dietary supplement in adults, 1-2 milligrams daily is sometimes used. Thiamin is also used to treat thiamin deficiency, metabolic/genetic enzyme deficiency disorders, neuropathy, and Wernicke's encephalopathy (prevention/treatment) under medical supervision.

Children (younger than 18 years)

The Adequate Intake (AI) for infants ages 0-6 months is 0.2 milligram; for infants 7-12 months the AI is 0.3 milligram; for children 1-3 years the U.S. Recommended Daily Allowance (RDA) is 0.5 milligram; for children 4-8 years the RDA is 0.6 milligram; for children ages 9-13 years the RDA is 0.9 milligram; for males ages 14-18 years the RDA is 1.2 milligram; and for females ages 14-18 years the RDA is 1 milligram, taken by mouth. The RDA for pregnant or breastfeeding women of any age is 1.4 milligrams daily, taken by mouth. Thiamin is also used to treat thiamin deficiency/beriberi under medical supervision.

NS_patient-thiamin

Portions of this document last updated:

Sept. 1, 2009

THIS EVIDENCE-BASED MONOGRAPH WAS PREPARED BY
THE NATURAL STANDARD RESEARCH COLLABORATION
(www.naturalstandard.com)


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