Chronology of Discovery of Vitamins – Vitamins for Health and Healing
Majid Ali, M.D. Years of Discovery of Vitamins 1913 Vitamin A (Retinol) Cod liver oil 1910 Vitamin B1 (Thiamine) Rice bran 1920 Vitamin C (Ascorbic acid) Citrus, most fresh foods 1920 Vitamin D (Calciferol) Cod liver oil 1920 Vitamin B2 (Riboflavin) Meat, eggs 1922 Vitamin E (Tocopherol) Wheat germ oil, unrefined vegetable oils 1926 Vitamin B12 (Cobalamins) Liver, eggs, animal
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