Generally, the body makes Vitamin D when exposed to the sun. This process is less efficient in dark-skinned people which is why blacks typically have low levels of vitamin D.
The main source of vitamin D is fatty fish such as Salmon and Mackerel. Certain foods such as milk, orange juice and cereals have been fortified with Vitamin D. We could also get Vitamin D from food supplements if we do not eat enough oily fish, eat foods fortified with vitamin D or we live in environments with little sunshine.
One of the main functions of Vitamin D is to support our immune system. Our immune system has been structured to fight unwanted pathogens in our system. Click on the link below for vitamin D supplement. Our vitamin D supplement is 100% organic.