Vitamin D3 (cholecalciferol) is a biologically active substance, one of the forms of vitamin D. It helps the body absorb calcium and phosphorus, which are essential for bone health, maintains normal blood pressure, and strengthens the immune system.

The main functions of vitamin D3 in the body include:

• promotes the absorption of calcium and phosphorus, and the renewal of bone tissue;
• improves the functioning of the nervous system, heart, eyes, and liver;
• helps maintain the elasticity of blood vessels;
• affects spermatogenesis and sperm activity;
• has a beneficial effect on female reproductive cells, promoting conception and a normal pregnancy;
• regulates blood clotting;
• participates in the metabolism of fats and carbohydrates;
• supports innate and acquired immunity, helping the body to cope with viral and bacterial infections.