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Source Naturals Vitamin D-3 400IU 100 Tabs

Sunlight is the source of life on Earth, but we may not be aware of all the ways it benefits us. 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. Vitamin D-3 maintains healthy calcium and phosphorus levels in the body for strong bones; it increases muscle strength in older adults; and it also plays an active role in a healthy immune response. Vitamin D-3 (cholecalciferol) is the optimal form of vitamin D. It is the form of vitamin D that the body manufactures in sunlight, and the form most efficient for the body’s needs.


  • Bioactive Form for Bone and Immune Health


  • Enhances Immune Health
  • Promotes Proper Bone Health


Take 1 tablet 2 to 3 times daily, following a meal. Do not exceed suggested use.


Supplement Facts

Serving Size: 1 Tablet

Servings per Container: 100

Amount Per Serving % Daily Value

Vitamin D3 (as cholecalciferol) 400 IU 100%

Other Ingredients: Microcrystalline cellulose and stearic acid.