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 products

1929 Vitamin K (Phylloquinone/phytol naphthoquinone) Leafy green vegetables

1931 Vitamin B5 (Pantothenic acid) Meats, whole grains,

in many foods

1931 Vitamin B7 (Biotin) Meats, dairy products, eggs

1934 Vitamin B6 (Pyridoxine) Meat, dairy products.

1936 Vitamin B3 (Niacin) Meat, eggs, grains

1941 Vitamin B9 (Folic acid) Leafy green vegetables

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