About this item Our Vitamin D3 supplement may aid in the management and absorption of calcium, which is also vital for your bones and teeth. One of the important functions of vitamin D3 includes supporting the immune system. It stimulates the production of T cells and helps build your natural body defenses. Vitamin D is considered an essential nutrient for maintaining healthy bones, teeth, muscle function, and the immune system. You can stay healthy by taking vitamin D3 supplements. Each capsule contains 120 - 1250 mcg of vitamin D3 (50,000 IU) to minimize sun exposure and restore depleted vitamin D levels in adults. This product is manufactured in a GMP certified USA facility - using only the highest quality, thoroughly tested ingredients and produced in a facility that follows GMP guidelines. This product is tested by a third-party laboratory to ensure the quality of its ingredients.g GMP guidelines. This product has been tested by a third-party laboratory to ensure the quality of the ingredients.