Vitamin B1 – Thiamine
A deficiency of thiamine may result in loss of appetite, fatigue, depression, constipation, confusion, poor coordination, and nerve degeneration. The classical deficiency disease is Beri-Beri. Alcoholics often show a B1 deficiency. The RDA for thiamine is 1.2 mg. A supplemental level is 2 to 100 mg. There is no toxic dose listed for thiamine.
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