Source Naturals Wellness Vitamin D-3 2000 iu Bioactive Form for Immune Health - 200 Softgels

Our bodies manufacture vitamin D-3 when the skin is exposed to UV radiation from sunlight, but the ability to do so decreases as we age;Helps maintain healthy calcium and phosphorus levels in the body for strong bones;Supports increased muscle strength in older adults, and it also plays an active role in a healthy immune response;It is the form of vitamin D that the body manufactures in sunlight, and the form most efficient for the body's needs