Vitamin D3 is naturally produced by our body when our skin is exposed to ultraviolet radiation. The modern lifestyle, the use of sunscreens, and other factors often result in vitamin D3 deficiency, and therefore, its replenishment with dietary supplements is necessary.

Vitamin D3 contributes to:

• the normal absorption and utilization of calcium and phosphorus,
• the maintenance of normal calcium levels in the blood,
• the maintenance of normal teeth and bones,
• muscle function,
• the normal function of the immune system,
• the process of cell division.

Vitamin D3 in dietary supplements usually comes from animal sources and is therefore unsuitable for those following a vegetarian diet.