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Sunscreen: Difference between revisions
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[[File:SPF15SunBlock.jpg|thumb|250px|Image of a tube of 15 SPF sunscreen lotion]] | [[File:SPF15SunBlock.jpg|thumb|250px|Image of a tube of 15 SPF sunscreen lotion]] | ||
== Introduction == | == Introduction == | ||
Sunscreen is a product that utilizes and combines sun protecting ingredients in order to protect the human from the dangerous ultraviolet rays. All sunscreens are different and they all vary in their level of protection from the powerful UVA and UVB rays. The sunscreen absorbs the sun’s rays, preventing them from reaching the skin. Sunscreen protects the human skin from skin cancer and includes many benefits. Sunscreen’s effectiveness is measured by a system called SPF, or the Sun Protecting Factor. Fifteen SPF protects against 94 percent of the sun’s rays and thirty SPF protects against about 96 percent of the sun’s rays. | Sunscreen is a product that utilizes and combines sun protecting ingredients in order to protect the human from the dangerous ultraviolet rays. All sunscreens are different and they all vary in their level of protection from the powerful UVA and UVB rays. The sunscreen absorbs the sun’s rays, preventing them from reaching the skin. There is a difference between a chemical sunscreen and a physical sunblock. Sunscreen absorbs the rays, while sunblock reflects them. This product protects the human skin from skin cancer and includes many benefits. Sunscreen’s effectiveness is measured by a system called SPF, or the Sun Protecting Factor. Fifteen SPF protects against 94 percent of the sun’s rays and thirty SPF protects against about 96 percent of the sun’s rays. | ||
<ref>Authorlastname, Firstname. [http://www.example.com ArticleTitle] ''Publisher site name''. Web. Month Day, Year. (specify whether date of publication or last-modified or accessed - i.e. Published November 3, 2015.)</ref> | <ref>Authorlastname, Firstname. [http://www.example.com ArticleTitle] ''Publisher site name''. Web. Month Day, Year. (specify whether date of publication or last-modified or accessed - i.e. Published November 3, 2015.)</ref> | ||
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'''UVB:''' | '''UVB:''' | ||
UVB rays are the main cause of sunburns and the damage of the skin. These rays are the most intense of the two and they are the most harmful. Although the UVA rays penetrate the skin more deeply, UVB rays are the main cause of skin cancer in sunburns. UVB rays have shorter wavelength, but are more powerful.<ref>Epstein, John. [http://www.skincancer.org/prevention/uva-and-uvb UVA and UVB] ''Skin Cancer Foundation''. Web. April 18, 2016- last updated.</ref> | UVB rays are the main cause of sunburns and the damage of the skin. These rays are the most intense of the two and they are the most harmful. Although the UVA rays penetrate the skin more deeply, UVB rays are the main cause of skin cancer in sunburns. UVB rays have shorter wavelength, but are more powerful.<ref>Epstein, John. [http://www.skincancer.org/prevention/uva-and-uvb UVA and UVB] ''Skin Cancer Foundation''. Web. April 18, 2016- last updated.</ref> | ||
== Active ingredients == | |||
The effects and the benefits are very well known in regards to sunscreen, but what causes it function properly? Sunscreen is made up of many active ingredients that give it its ability to block the sun’s dangerous rays. The active ingredients produce a thin cover over the skin that causes the UV rays from entering the skin. The active ingredients include avobenzone, oxybenzone, and benzophene. These three main chemicals absorb the UV rays. Most chemical sunscreens only protect the skin from UVB rays, but there are many that provide protection from both rays. Physical sunscreens, or sunblock, gives protection from both the UVB and the UVA rays. Sunblock reflexes the sun’s rays back into the atmosphere by using ingredients such as zinc oxide and titanium dioxide. Due to the varieties of sunscreens, there are some brands that use both chemical and physical ingredients. | |||
== Video == | == Video == | ||
