The production of Vit D-3 in the human body is a photochemical reaction that occurs when the skin is exposed to UVB ultraviolet radiation.
However, the catalytic action of sunlight varies.
The modern lifestyle, prolonged use of photoprotective products and environmental factors contribute to the widespread occurrence of vitamin D-3 deficiency, which affects approximately 50% of the world's population across all nationalities and all ages.
Vitamin D-3 significantly aids in the development and maintenance of bones and bone density.
It promotes adequate absorption of calcium, which also contributes to bone and tooth health.
Additionally, it participates in healthy cell growth and the maintenance of a normal nervous and immune system.
D-3 is contained in a few foods, mainly animal-based, such as salmon, tuna, sardines, mushrooms, egg yolks and "fortified" milk.
For those who have difficulty reaching recommended levels, taking vitamin D-3 supplements (with a doctor's approval) can help boost D-3 levels in the body.