1913: Vitamin A (retinol) was discovered.
1920: Vitamin C (ascorbic acid) was discovered
1920: Vitamin D (calciferol) was discovered.
1922: Vitamin E (tocopherolki) was discovered.
1929: Vitamin K1 (Philoquinone) was discovered.
1910: Bitamin B1 (Thymin) was discovered.
1920: Vitamin B2 (Ryboflavin) was discovered
1936: Vitamin B3 (Niacin) was discovered.
1931: Vitamin B5 (Pantothenic acid) was discovered
1934: Vitamin B6 (pyridoxin) was discovered.
1931: Vitamin B7 (biotin) was discovered.
1941: Vitamin B9 (fallic acid) was discovered.
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