1. Many South Africans also have a Thiamine ( Vitamin B1 ) deficiency. 2. Vitamin B1 is crucial for the development of an infant's neurological system.3. Unfortified nutritional yeast provides from 35 to 100 percent of vitamins B1 and B2. 4. Another review found that Vitamin B1 to be effective. 5. It contains Vitamin B1 , B2, B6, Folic acid, Dietary fiber, Oligosaccharide, Cysteine, Arginine and Glutamine. 6. Vitamin B1 , also known as thiamin, is vital for development of the nervous system in babies.7. Vitamin B1 or thiamine is present at a concentration between 0.2 and 0.5 milligrams per litre.8. There, he finally got treatment for beriberi, a disorder caused by a deficiency of Vitamin B1 . 9. The company is announcing that it took out Vitamin B1 . . . this is just unbelievable. 10. "' Beriberi "'refers to a cluster of symptoms caused primarily by thiamine ( vitamin B1 ) deficiency. 
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