Adva-D3 5000 IU is essential for calcium absorption, making this nutrient vital for bone and teeth health. Crucial for activating immune defenses, Vitamin D3 may also prevent infectious and autoimmune diseases. Promoting bone mineralization, Vitamin D3 may prevent or slow the progression of osteoporosis - supplementation can help avoid porous bones, weak muscles and easy fracturing. Vitamin D3 also supports a healthy brain, muscles and nervous system.