![]() There are some concerns about potential vitamin D deficiency arising from prolonged use of sunscreen. The rash can occur anywhere on the body where the substance has been applied and sometimes may spread to unexpected sites." Vitamin D production There is a risk of an allergic reaction to sunscreen for some individuals, as "Typical allergic contact dermatitis may occur in individuals allergic to any of the ingredients that are found in sunscreen products or cosmetic preparations that have a sunscreen component. To date, the current weight of evidence suggests that TiO 2 and ZnO nanoparticles do not reach viable skin cells." Sunscreen ingredients typically undergo extensive review by government regulators in multiple countries, and ingredients that present significant safety concerns (such as PABA) tend to be withdrawn from the consumer market. In 2009, the Therapeutic Goods Administration of Australia updated a review of sunscreen safety studies and concluded: "The potential for titanium dioxide (TiO 2) and zinc oxide (ZnO) nanoparticles in sunscreens to cause adverse effects depend primarily upon the ability of the nanoparticles to reach viable skin cells. Minimizing UV damage is especially important for children and fair-skinned individuals and those who have sun sensitivity for medical reasons. ĭiligent use of sunscreen can also help to slow or temporarily prevent the development of wrinkles, dark spots and sagging skin.Ī tube of SPF 30 sunblock on sale in the United States. Some sunscreens include an expiration date-a date indicating when they may become less effective. In the United States, sunscreens are required to remain effective at original strength for at least three years. To provide a better indication of their ability to protect against skin cancer and other diseases associated with UVA radiation (such as phytophotodermatitis ), the use of broad-spectrum ( UVA/UVB) sunscreens has been recommended. However, many sunscreens do not block Ultraviolet A (UVA) radiation, yet protection from UVA is important for the prevention of skin cancer. The routine use of sunscreens may also reduce the risk of melanoma. Medical organizations such as the American Cancer Society recommend the use of sunscreen because it aids in the prevention of squamous cell carcinomas. Further research has linked chemical UV filters to human carcinogen cancer causing chemicals. Research by the FDA on the safety of the main three organic (chemical) UV filters, oxybenzone, homosalate and octocrylene found that the three ingredients could be detected on the skin, in blood, in breast milk and in urine samples weeks after no longer being used. ĭespite popular belief, both types of sunscreens work mainly by absorption of UV light. Sunscreens are classified into inorganic (mistakenly called 'physical') sunscreens (i.e., zinc oxide and titanium dioxide) and organic (also, mistakenly referred to as 'chemical') sunscreens. ![]() Despite sunscreen being relatively new, sun protection practices have been observed since at least the ancient Egyptians "who used ingredients such as rice bran, jasmine, and lupine" to provide sun protection. Its protection was verified by the University of Adelaide and it was also produced commercially by Blake's company, Hamilton Laboratories. ![]() Milton Blake, in 1932 formulating with the UV filter 'salol' (Phenyl salicylate) at a concentration of 10%. The first sunscreen in the world was invented in Australia, by chemist H.A. Sunscreens are common supplements to clothing, particularly sunglasses, sunhats and special sun protective clothing, and other forms of photoprotection (such as umbrellas). Sunscreens come as lotions, sprays, gels, foams (such as an expanded foam lotion or whipped lotion), sticks, powders and other topical products. ![]() Sunscreen, also known as sunblock or sun cream, is a photoprotective topical product for the skin that absorbs or reflects some of the sun's ultraviolet (UV) radiation and thus helps protect against sunburn and most importantly prevent skin cancer.
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