Vit D Deficiency

Vitamin D is synthesised in the skin by the action of sunlight containing ultraviolet B (UVB) radiation.

Skin synthesis is the main source of vitamin D for most people.

Exposure to sunlight is a major source of vitamin D for most people

• • BUT
    5. Risks of erythema
    5. Potential skin cancer
    5. 80% of daily vitamin D requirement
    5. Different capacity of individuals to generate similar amounts of vitamin D following exposure to ultraviolet B (UVB) rays (280–315 nm)
    5. Intensity of sunlight
    5. Amount of skin exposed
    5. Duration of exposure to UVB rays
    5. The zenith angle of the sun
    5. Thickness of the skin
    5. The skin color