00:00Why does the sun cause sunburns?
00:03Nothing spoils a day outdoors faster than sunburn.
00:07But what's actually going on with your skin when it goes from tan to burn?
00:12Or for some people, straight to burn?
00:15Everyone's skin contains a pigment called melanin.
00:18The more melanin a person has, the darker their skin.
00:21Now melanin plays an important role when it comes to protecting your skin from the sun.
00:25The pigment absorbs UV radiation, protecting your skin from its damaging effects.
00:31In fact, the reason a person tans in the first place is actually a defense mechanism.
00:36When UV rays hit your skin, your body starts to make more melanin because the more melanin
00:42you have, the better protected you are.
00:44And the more melanin your skin produces, the darker your tan.
00:48Now, you may be thinking, if the body has this great natural defense, why do we still
00:52get burned?
00:53Well, each person can only produce so much melanin.
00:57An amount that's determined by your genetics.
00:59Simply put, most people aren't able to make enough to adequately protect their skin.
01:05And when the melanin runs out, the burns begin.
01:08Damage from the sun essentially causes skin cells to die off.
01:12And when this happens, the body sends blood to the area to help the healing process, giving
01:17your skin that bright red color.
01:19It also sends immune molecules that lead to pain and inflammation.
01:23So, think of melanin as your first line of defense, but it shouldn't be your only line
01:28of defense.
01:29That's where sunscreen comes in.
01:30Why sun burns the skin, just another one of life's little mysteries.
01:35Well health billens if the Jahres Willлу dove their powers have a great odds.
01:35For more Civil Rights Resume.
01:35For more, than once a year of differently, or a new тобой than Jesus được I can destroy the
01:35dehors of an online church and it's my family to the Mass.
01:35And I hope that has put refuse and power!
01:36Because I don't have anything lukeercice in any way of the way of the way.
