sun exposure. Increase of melanin in sun exposed areas causes darkening of the skin Major areas of the body parts exposed to the sun!!
Tanning is a very common problem for people living in hot and tropical countries. Its common to see tanning after a good vacation on the side, outdoor sports , long day trekking , outing , etc Tanning is the process of increase in melanin (skin pigmentation) due to sun exposure. Increase of melanin in sun exposed areas causes darkening of the skin Major areas of the body parts exposed to the sun are Face , neck , hand , arms , legs , feet , back.
Sunlight consists of ultraviolet ( UV rays ) , ultraviolet radiation causes skin damage. UV radiation has three wavelengths UVB , UVA , UVC . UVA rays darken the skin by penetrating in to the layers of skin , they stimulate skin cells ( Malenoncyte ) to produce excess melanin , which further darkens due to oxidation and causes tanning where as UVB rays burns the skin . They also damage the collagen.
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Tanning can damage the skin so its to treat tanned skin to avoid further damage
Several tan removal creams and serums with the ingredients – Licorice , Niacinamide , Vitamin C and Kojic Acid are some skin lighting activist used to remove tan,