Calcitriol + Calcium citrate + Vitamin K2-7 + Methylcobalamin + Zinc Oxide + Magnesium Oxide + L-Methyl Folate is a combination of seven nutritional supplements. Calcitriol is a synthetic Vitamin D that regulates the absorption of calcium in the body and strengthens the bones. Calcium citrate increases calcium depositing in the bones that increase the density of the bones to them stronger. Vitamin K2-7 is a vitamin that improves bone and heart health. Methylcobalamin is an active form of Vitamin B 12. This helps in proper cell growth and development, helps in protein synthesis and production of blood cells (red and white blood cells). Zinc Oxide is a mineral supplement that works to boost up the immune system and also promotes growth. Magnesium Oxide is a mineral supplement that promotes heart and bone health. L-Methyl Folate is a nutritional supplement that increases the production of blood (red blood cells) in the body. This is how it works in the treatment of nutritional deficiencies.