Year of vitamins discovery

1. 1913: Vitamin A (retinol) was discovered.
2.1920: Vitamin C (Ascabic acid) was discovered
3.1920: Vitamin D (calciferol) was discovered.
4.1922: Vitamin E (tocopherolaki) was discovered.
5.1929: Vitamin K1 (Philoquinone) was discovered.
6.1910: Bitamine B1 (Thiamine) was discovered.
7.1920: Vitamin B2 (riboflavin) was discovered
8.1936:
Vitamin B3 (Niacin) was discovered.
9.1931: Vitamin B5 (pantothenic acid) was discovered
101934: Vitamin B6 (pyridoxine) was discovered.
11.1931: Vitamin B7 (Biotin) was discovered.
12.1941: Bitamine B9 (folic acid) was discovered.