Vital contains Vitamin D3 (lichen), B12 (methylcobalamin), K2 and Magnesium bisglycinate. Vitamin D needs magnesium to be metabolized in the body. Magnesium and Vitamin B12 contribute to the reduction of tiredness and fatigue. Vitamin K2 helps direct vitamin D into the right places in the body. Vitamin D3 (cholecalciferol), Magnesium bisglycinate, Vitamin B12 (Methylcobalamin), vitamin K2 (Menaquinone-7), Pullulan (vegan capsule). Maintains good health. Helps to maintain/support immune function. Helps with the normal function of the immune system. Helps with energy metabolism in the body. Oral (Adolescent 9-18 years old, Adults 19 years and over): Take 1-2 capsules dily.