Vitamins: Chemical Name, Sources, Deficieny and Discovery

Approximate Year of discovery	Vitamin / Chemical Name	Food source	Deficiency Disease
1913	Vitamin A (Retinol, retinal)	Cod liver oil	Night blindness, Keratomalacia
1910	Vitamin B1 (Thiamine)	Rice bran	Beriberi, Wernicke-Korsakoff syndrome
1920	Vitamin B2 (Riboflavin)	Eggs	Ariboflavinosis
1936	Vitamin B3 (Niacin, niacinamide)	Liver	Pellagra
1931	Vitamin B5 (Pantothenic acid)	Liver	Paresthesia
1934	Vitamin B6 (Pyridoxine, pyridoxamine, pyridoxal)	Rice bran	Anemia, peripheral neuropathy.
1931	Vitamin B7 (Biotin)	Liver	Dermatitis, enteritis
1941	Vitamin B9 (Folic acid, folinic acid)	Liver	Deficiency during pregnancy is associated with birth defects, such as neural tube defects
1926	Vitamin B12 (Cyanocobalamin, hydroxycobalamin, methylcobalamin)	Liver	Megaloblastic anemia
1920	Vitamin C (Ascorbic acid)	Lemons	Scurvy
1920	Vitamin D (Ergocalciferol, cholecalciferol)	Cod liver oil	Rickets and Osteomalacia
1922	Vitamin E (Tocopherols, tocotrienols)	Wheat germ oil, Cosmetics and liver	Sterility, Deficiency is very rare; mild hemolytic anemiain newborn infants
1929	Vitamin K (phylloquinone, menaquinones)	Alfalfa	Hemophilia, Bleeding diathesis