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The Science of Tanning

There's a lot of controversy surrounding tanning. Some people say a little sun is good for you (it's a source of vitamin D, you know), while others say you should stay in the shade to avoid skin cancer. But how many people really know what's going on in your skin to make you turn brown? Get the good on tanning here!

What is a Tan?

Melanocytes are special skin cells that produce melanin (skin pigment) when they are exposed to ultraviolet light in sunlight. The pigment absorbs UV radiation in sunlight, so it helps to protect skin cells from UV damage. Your body actually produces two kinds of pigmant. One is called eumelanin and it is responsible for the golden brown color we normally associate with tanning. Another pigment is called phaeomelanin and it produces a red color. Redheads and blondes produce more phaeomelanin and less eumelanin, which is why they don't tan as well.

How Does Your Body Know It's Sunny Out?

Sunlight (or UV light from tanning beds) affects the pituitary gland (a gland at the base of the brain that secretes hormones) which then produces MSH (melanocyte-stimulating hormone). This hormone flows through the bloodstream to the melanocytes, which makes them able to produce more melanin. Since the pituitary gland is tied into the optic nerve, (the nerve in your eyes that lets you sense light), wearing sunglasses makes you tan less. Weird.

Tanning and Race

Different races tan differently (and some don't tan at all). Caucasians (white people) and other lighter skinned races tan the way explained above. People of darker races produce melanin continuously (without having to go in the sun), which means their skin is always pigmented (dark) to varying degrees. People of dark races are much less likely to get skin cancer because their cells are constantly protecting them from UV radiation.

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snoopynwoodstock123
Neither do i but i still have custard creams I had a giant one today on the plane like the ones you get in costa
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XxRuby_PhoenixxX
i never leave my house so
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snoopynwoodstock123
Phoenix you must have a custard cream they are amazing i love them and you will love them too they are the creation of the gods
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XxRuby_PhoenixxX
me and ivy are now best friends forever and partners in crime
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Black_Rose_19
Black_Rose_19 posted in Random:
Preach, snoop dawg, preach.
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