Vitamin D3 4000 IU is an effective supplement containing 100 μg (4000 IU) of vitamin D3 in the form of cholecalciferol. It is a fat-soluble compound, which is why it is supplemented with olive oil in softgel capsules. Vitamin D itself influences a wide range of processes in our body. It supports the proper function of the immune system and muscles, as well as normal calcium levels in the blood. It is suitable for anyone who wants to take care of their health.