Mason Natural Vitamin D3 2000 IU is a high-potency dietary supplement formulated with cholecalciferol, the bioavailable form of vitamin D your body naturally produces. Each serving delivers 2000 IU to support bone and teeth health, immune function, and calcium absorption—essential for those with limited sun exposure or insufficient dietary intake. This 300-count bottle provides a convenient way to maintain optimal vitamin D levels and support overall wellness year-round.