Vitamin D softgels provide a more readily absorbable fat soluble vitamin found in some plant and animal sources, but primarily produced by the body after exposure to the sun’s ultraviolet (UV) rays. UV rays promote the skin’s production of vitamin D. Vitamin D3 or cholecalciferol is the most active form, while vitamin D2 or ergocalciferol is synthesized by plants and less available to humans (in fact, studies cited in the Journal of Clinical Endocrinology & Metabolism, indicate that Vitamin D3 is 87% better in humans, in terms of absorption and bioavailability, than D2).
Vitamin D functions primarily to maintain normal blood levels of calcium and phosphorus. By supporting healthy calcium absorption, vitamin D supports healthy bones. Vitamin D also works synergistically with other vitamins, minerals, and hormones to promote bone mineralization. Unfortunately with aging, skin cannot synthesize vitamin D from the sun as efficiently.
Vitamin D has more recently been in the spotlight for immune system support. Vitamin D is thought to promote immune health by supporting regulation of cell growth and differentiation -- the process that determines cell’s “job” in the body.
Vitamin D has also shown great promise in maintaining the body’s innate immune response as well as supporting appropriate autoimmune activity. Both these mechanisms are thought result from vitamin D’s regulation of T cell development.