Vitamin B1 (Thiamine HCl) 200mg 18,181. Inositol 20mg. Choline (Bitartrate) 8.2mg. Vitamin B6 (Pyridoxine HCl) 20mg 1429. Vitamin B2 (Riboflavin) 20mg 1429. Biotin 200µg 400. B complex vitamins also contribute to the protection of cells from oxidative stress.