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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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What is the minimum SPF You Should Wear?

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Roses are red, violets are blue, I'm schizophrenic, and so am I.
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MixMox posted in Debating:
i do both, but i "prefer" night dreaming. 
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yaverleaf11
If you'd like to start an RP, I'm open for rping. I'm trying to be a bit more active on here too haha
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austin312so
Hi, my name is Austin312so, and I want to talk to all of you about Sohan S. Thandi Foundation. Well there was someone named Sohan S. Thandi, and he was my grandpa who passed away in 2015 September 25 on my parents anniversary. He had cancer, which was spread around his body. He would try to keep it a secret, but sooner we all found out that he had cancer, this cancer was really bad whenever he drank water, it would stay in his body and go straight to his legs and feet and it was swollen. He was a great father, Army Sgt, and also a great grandpa to his grandchildren. He had 7 children, which 6 were girls, and 1 boy. We would meet him every time he'll be really happy to meet us kids.On his last day, he wanted everyone to be happy and don't worry about anything he taught me a lot to be strong and also it made me follow his footsteps and join Army Cadets. I am making this foundation for him and all the children and adults who have cancer to be cancer free. Thank you for listening.
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