Vitamin D is perhaps one of the most studied and evidenced vitamins with a wide range of health benefits. It is commonly accepted that Vitamin D contributes to the maintenance of normal bones and teeth, muscle function, the function of the immune system and is needed for normal growth and development of bone in children.

Lack of sunshine through geography and autumn/winter seasons in the Northern hemisphere, as well as limited outdoor activity may mean that Vitamin D levels are hard to maintain without intake via food or supplements.

Vitamin D3 is the most bioavailable form of this vitamin.