Vitamin D3 2000 IU is a dietary supplement that provides a potent dose of vitamin D3, also known as cholecalciferol. This formulation is commonly chosen to support healthy bones, teeth, and immune function. Vitamin D3 plays a crucial role in calcium absorption and utilization, which is essential for maintaining bone strength and density. It is often recommended for individuals with limited sun exposure or those who may have difficulty obtaining adequate vitamin D from natural sources.