NUTRIJA VITAMIN D3, Provides 400IU of 100% Pure Vegan Vitamin D3 as Cholecalciferol in each serving, which is active form of Vitamin D3, which is essential for maintaining bone health and the immune system. Also help you maintain healthy levels of this essential vitamin during periods of reduced sun exposure. NUTRIJA Vitamin D3 helps regulate immunity, mood, and the neuromuscular system. Vitamin D3 helps enhance calcium absorption by regulating concentrations of calcium and phosphorus in the body to provide essential support for bones and teeth.