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- The frequency range should cover 280 to 400 nanometers. The greatest concern lies between 290 and 360 nanometers. DNA damage does occur in the UVB spectrum.
- The definition of radiation is "" The process in which energy is emitted from molecules and atoms owing to internal change ." (from Webster's Dictionary)
- UVB cause " burn appearance " UVB is most prevalent on sunny days from 10:00 am to 2:00 p.m.
- The sun protection factor (SPF) addresses the time it takes for your skin to burn. The number signifies, in general, period of time (minutes) that it takes the average Caucasian skin to burn with sun screen versus not wearing one.
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- There is a significant variance between products using " similar SPF "
- SPF only relates UVB and has nothing to do with UVA radiation; UVA radiation causes "aging appearance." UVA exists in rain or shine from sunrise to sunset 365 days a year.
- UVA causes long term damage that may not appear for years
- UVB and UVA radiation are both know to cause skin cancer.
- Because SPF rating does not acknowledge the specific amount of absorption in the UVB range and the FDA does not have a monograph for UVA production. There is no definitive measure in the United States to assess the efficacy of a suntan product for UVA and UVB production
- A suntan lotion can offer 99% UVB protection and minimal UVA absorbency, yet it is classified as " broad spectrum " in the United States.
- Recent medical studies have proven that products utilizing Avobenzone (Parsol 1789) degrade and lose their ability to block further radiation. This degradation occurs upon exposure to sunlight! Other studies have demonstrated that a chemical reaction can occur with the active Methoxycinnamate ingredient destroying it and leaving users susceptible to large UVB exposure.
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