{"id":1391,"date":"2025-09-04T13:21:58","date_gmt":"2025-09-04T17:21:58","guid":{"rendered":"https:\/\/www.allergy-associates.com\/?p=1391"},"modified":"2025-09-04T13:21:58","modified_gmt":"2025-09-04T17:21:58","slug":"sunscreen-quanta","status":"publish","type":"post","link":"https:\/\/www.allergy-associates.com\/?p=1391","title":{"rendered":"Sun(screen) Quanta"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li>UVA (wavelength 320-400 nm) accounts for 95% of terrestrial radiation\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>UVB (wavelength 290 \u2013 320 nm) accounts for the other 5%\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Both cause photoaging, hyperpigmentation and skin cancer\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>UVB causes sun burn\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>UVB is strongest midday and in the warm months\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>UVA is\u00a0relatively constant\u00a0day round and year-round.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>UVA is not filtered out by glass, but UVB is\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SPF (sun protection factor) is the ratio of the amount of UV light\u00a0required\u00a0to cause sunburn on sunscreen protected skin to the amount\u00a0required\u00a0on unprotected skin\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SPF protection is based on a 2mg\/cm<sup>2<\/sup>\u00a0thickness of application. Most consumers only apply .5 mg\/cm<sup>2<\/sup>\u00a0(a thinner layer) and therefore\u00a0don\u2019t\u00a0receive the desired protection\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Blocking agents are either organic (octinoxate,\u00a0homosalate,\u00a0octisalate, oxybenzone, avobenzone,\u00a0ecamsule,\u00a0ensulfizole) or inorganic (titanium dioxide and zinc oxide)\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Octinoxate,\u00a0homosalate,\u00a0octisalate, and\u00a0ensulfizole\u00a0only block UVB\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zinc oxide and titanium dioxide block both UVA and UVB but zine offers better UVA protection\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>All organic sunscreens can cause allergic contact allergy especially oxybenzone\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Organic sunscreens are absorbed systemically, and animal studies raise estrogen and lower testosterone levels\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oxybenzone has been shown to impact kidney function\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oxybenzone and\u00a0octinoxate\u00a0are detrimental to sea corals\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>UPF is ultraviolet protection fact of solar clothing\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A UPF of 30-49 provides\u00a0very good\u00a0protection and a UPF of 50+ excellent protection\u00a0<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1391","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=\/wp\/v2\/posts\/1391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1391"}],"version-history":[{"count":1,"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=\/wp\/v2\/posts\/1391\/revisions"}],"predecessor-version":[{"id":1392,"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=\/wp\/v2\/posts\/1391\/revisions\/1392"}],"wp:attachment":[{"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.allergy-associates.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}