• Vitamin B Complex contributes to the reduction of tiredness and fatigue. Nutrional Information. Each tablet will provide: Thiamin (B1) 5mg, Riboflavin (B2) 5mg, Niacin (B3) 25mg, Vitamin B6 5mg, Folic Acid 200mcg, Vitamin B12 5mcg, Biotin 75mcg, Pantothenic Acid (B5) 5mg, Choline 20mg, Inositol 20mg.