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| | Vitamins |
 | | Symptoms of beriberi, many of which are neurological, include fatigue, irritation, poor memory, sleep disturbances, anorexia, abdominal discomfort and constipation, nerve problems like burning sensations in the feet, calf muscle cramps and weakness, and other symptoms. |
 | | Because people thought that beriberi was caused by a bacterium, this disease was thought to be contagious, and people who contracted it were isolated from well people. |
 | | Based on this evidence, Dr. Eijkman proposed that beriberi was a nutritional deficiency, not caused by a bacterium, and that something in the rice bran prevents beriberi. |
| biology.clc.uc.edu /courses/bio105/vitamin.htm (2009 words) |
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