Vitamin D Cholecalciferol is a unique dietary supplement that is found in a few foods including oily fish such as tuna, mackerel, and sardines (47). Unlike vitamin D2 which is obtained from the diet, Vitamin D (47) is synthesized in the body when the skin is exposed to ultraviolet radiation from the sun.

Over time, the ability of the skin to create vitamin D decreases, and this requires the use of Vitamin D supplements. It is effective in preventing aging and skin wrinkles.

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