21St Century B-Complex With Vitamin C Tablets Contain Essential B Vitamins And Vitamin C, Which Work Together To Boost Energy, Enhance Immune Function, And Support Skin Health. Vitamin C – 60 Mg Vitamin B1 (Thiamine) – 1.5 Mg Vitamin B2 (Riboflavin) – 1.7 Mg Vitamin B3 (Niacin) – 20 Mg Vitamin B5 (Pantothenic Acid) – 10 Mg Vitamin B6 (Pyridoxine) – 2 Mg Vitamin B7 (Biotin) – 30 Mcg Vitamin B9 (Folic Acid) – 400 Mcg Vitamin B12 (Cyanocobalamin) – 6 Mcg