Sunscreen: a must read
Sunscreen comes in more varieties than Heinz sauce’s. How is one to navigate the aisles and aisles of different choices and pick the right sunscreen? This quick article will help you understand UV light, sunscreen ingredients and labeling so you will be able to make the right choice for you and your family members in any sunny situation. About UV Light To understand sunscreens first you must understand a little about the light they are designed to filter. UV or ultraviolet light is a very short and high energy electromagnetic wave that is produced by the sun. UV light can cause changes in DNA over time leading to collagen breakdown, sun spots and cancer. Three different UV rays make it to our planet: A, B and C. UVC rays are the shortest (100-280nm) and do not affect us much because they are mostly absorbed by the upper atmosphere. UVB rays are medium size (280-315nm) and UVA rays are the longest (315-400nm). Ordinary window glass passes about 90% of the light above 350 nm (UVA), but b...
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