Source of Life Garden Vitamin D3 provides 2,500 IU (62.5 mcg) of natural vitamin D3 (cholecalciferol) from six edible mushrooms in a nutrient-rich, plant-based whole food base. Source of Life (S.o.L.) Garden stands for yeast-free and natural, certified organic U.S. nutrients, making it the gold standard for wholesome nutritional supplements. S.o.L. Garden supplies selected plants that naturally contain individual nutrients in increased concentrations. They are accompanied by all enzymes, phytonutrients and co-factors in the natural quantities and ratios that together determine the effect. Humans have adapted to this form in the course of evolution. The result is excellent absorption and high utility for the body. Vitamin D is a vitamin that the body can produce on its own. Vitamin D synthesis takes place in the skin with the help of sunlight. That's why vitamin D is also known as the sunshine vitamin. In the months with little sunshine, the sun's rays are too low for sufficient vitamin D production, so that a deficiency can develop. Therefore, supplementation with vitamin D is a useful extra for many people, especially in winter. Our body needs vitamin D and calcium not only for strong bones and teeth, but also for a functioning immune system and the maintenance of muscle strength. As a prophylaxis for osteoporosis, an adequate supply of vitamin D is especially important for older people. Winter depression is also related to vitamin D status. Source of Life Garden™ is 100% natural, wholesome, vegan and certified organic. Hint: Food supplements are not intended to be a substitute for a balanced and varied diet.