According to scientific studies, the vitamin D3 (cholecalciferol) is the most bioavailable most assimilable by the body form of vitamin D. Natural source of miraculous vitamin D3 is the sun. Reduced sunlight but during the winter and the necessary use of sunscreen prevents uptake by the body. For this reason Solgar you provide in the form of food supplement from natural sources and no added colors flavors and preservatives. 

The adequacy of vitamin D3 in the body ensures not only the absorption of calcium, not only good mood and vitality and protect against challenges of winter after strengthens our immune system by helping white blood cells to draw the necessary information from our DNA to to cope with everyday threats. 

The active form of vitamin D3 by an organization involved in the activation of several important biological processes such as the mobilization of calcium and phosphorus from bone tissue, the absorption of calcium and phosphorus from food in the functioning of the thyroid and parathyroid gland, the functioning of the nervous system and immune system function. Also considered very useful in combating the symptoms of osteoporosis.