Vitamin B1 (Thiamine). Vitamin B2 (Riboflavin). Vitamin B7 (Biotin). Vitamin B3 (Niacin). Thiamin (Vitamin B-1) (as Thiamin Mononitrate). Serving Size: 3 Softgels. Vitamin E is an antioxidant and Vitamin C is involved in collagen production and formation, which forms the basis for vibrant skin.