Vitamin D3 is really a compulsory vitamin in the autumn-winter period, especially for the sun-deprived populations living in Northern Europe. Fat- soluble vitamin D in liquid form is the basis for 3,000 different essential processes in the body. Food supplement. Vitamin D3: - supports immunity, - promotes optimal skeletal health, - is required for calcium absorption, - helps against chronic fatigue, - helps to prevent inflammation. The main task of vitamin D is to ensure that calcium gets absorbed from nutrients and to transport it to the bones. If there is little vitamin D in the blood, it is difficult for the body to absorb calcium, which causes osteoporosis and rickets and decreases bone density. Low vitamin D levels can cause bone and muscle pain, chronic migraine, depression as well as chronic fatigue. Vitamin D increases the number of antiviral, antibacterial and parasitic immune factors. D3 vitamins produced in Estonia are made from organic hemp seed flour. Vitamin D3 (cholecalciferol) comes from lanolin that has been produced from sheep wool. Vitamin D levels can be measured either at a private medical laboratory or by seeing your general practitioner.