Furthermore, we added vitamin C and Magnesium. Solaray Mega Vitamin B-Stress is unique in that it releases half of the ingredients immediately, whilst the other half is released gradually over time. This way, you take the most advantage of our Vitamin-B complex. Live Brighter, met Solaray Mega Vitamin B-Stress! Vitamin C and Riboflavin contribute to the protection of cells from oxidative stress, Vitamin C, Thiamin, Niacin, Vitamin B6, Folate, Vitamin B12, Biotin and Magnesium contributes to normal psychological function: Energy: Vitamin C, Thiamin, Riboflavin, Niacin, Vitamin B6, Vitamin B12, Biotin, Pantothenic Acid and Magnesium contribute to normal energy-yielding metabolism. Skin: Riboflavin, Niacin and Biotin contribute to the maintenance of normal skin. Vitamin C contributes to normal collagen formation for the normal function of skin;