{"id":143,"date":"2020-05-06T01:25:30","date_gmt":"2020-05-06T06:25:30","guid":{"rendered":"https:\/\/www.cd-bioparticles.com\/blog\/?p=143"},"modified":"2020-05-06T01:25:30","modified_gmt":"2020-05-06T06:25:30","slug":"did-you-use-nanoparticle-sunscreen","status":"publish","type":"post","link":"https:\/\/www.cd-bioparticles.com\/blog\/applications\/did-you-use-nanoparticle-sunscreen\/","title":{"rendered":"Did You Use Nanoparticle Sunscreen?"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"\/blog\/wp-content\/uploads\/2020\/05\/Did-You-Use-Nanoparticle-Sunscreen-1-1-1024x683.jpg\" alt=\"\" class=\"wp-image-144\" srcset=\"\/blog\/wp-content\/uploads\/2020\/05\/Did-You-Use-Nanoparticle-Sunscreen-1-1-1024x683.jpg 1024w, \/blog\/wp-content\/uploads\/2020\/05\/Did-You-Use-Nanoparticle-Sunscreen-1-1-300x200.jpg 300w, \/blog\/wp-content\/uploads\/2020\/05\/Did-You-Use-Nanoparticle-Sunscreen-1-1-768x512.jpg 768w, \/blog\/wp-content\/uploads\/2020\/05\/Did-You-Use-Nanoparticle-Sunscreen-1-1-120x80.jpg 120w, \/blog\/wp-content\/uploads\/2020\/05\/Did-You-Use-Nanoparticle-Sunscreen-1-1.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<p>Men, women, and\nchildren who are more than 6 months old should use sunscreen every day. This\nincludes people who tan easily and people who don&#8217;t tan easily. Remember,\nwhether you are sunburned or not, your skin will be damaged by the sun for the\nrest of your life. According to its principle, sunscreen can be divided into\nthe following two categories.<\/p>\n\n\n\n<p>Chemical\nsunscreen<\/p>\n\n\n\n<p>This type of\nsunscreen relies on absorbing ultraviolet rays and then neutralizing them to\nrelease heat. Sensitive skin types may find this formula irritating to their\nskin. After smearing, it also takes a few minutes to work, which is about 15-20\nminutes.<\/p>\n\n\n\n<p>Physical\nsunscreen<\/p>\n\n\n\n<p>This type of\nsunscreen relies on reflection to keep the light away from the skin. When you\nuse physical sunscreen, you can imagine that there is a barrier or shield on\nyour skin. This is useful for sensitive skin types because it is less\nirritating and most effective. It can be used immediately after smearing.\nHowever, it feels very thick and usually leaves a white cast on the skin.<\/p>\n\n\n\n<p>Among the many\nhigh-tech products that add nanoparticles, there are two kinds of nanoparticles\nadded to sunscreen: <a href=\"https:\/\/www.cd-bioparticles.com\/product\/titania-nanoparticles-list-171.html\">titanium\ndioxide<\/a> (TiO<sub>2<\/sub>)\nand zinc oxide (ZnO) nanoparticles.<\/p>\n\n\n\n<p>Lighter and\nmore durable<\/p>\n\n\n\n<p>Large particles\nof zinc oxide and titanium dioxide have been used in sunscreen for decades and\ncan reflect or absorb ultraviolet rays that can cause cancer. Traditional\nsunscreen appears white after application because these large particles reflect\nvisible light. When zinc oxide and titanium dioxide are made into nanoscale\nparticles, the size is only 25-50 nanometers, and the role they play has\nchanged.<\/p>\n\n\n\n<p>Although zinc\noxide and titanium dioxide nanoparticles are clustered together when mixed into\nsunscreen, they still maintain a high degree of attraction to ultraviolet rays;\nat the same time, they also absorb and scatter visible light, thus making the\nlight near the skin appear transparent.<\/p>\n\n\n\n<p>Compared with\nother UV filtering ingredients, they are more stable, do not need to be\nreapplied repeatedly, and are less likely to cause allergic and irritating\nreactions. Another benefit is that nano-sized zinc oxide and titanium dioxide\nfeel &#8220;thinner&#8221; and do not give the skin a heavy, solidified feeling.<\/p>\n\n\n\n<p>To sum up,\nsunscreen containing nanoparticles is the real winner in the field of\nsunscreen. You can apply them in large quantities to protect your skin from the\nhot sun.<\/p>\n\n\n\n<p>Safer and more\nhigh-end<\/p>\n\n\n\n<p>Nanoparticles\nmade of metal oxides that can damage the skin after being incorporated into\nsunscreen are mainly those that can penetrate the skin. Available scientific\nevidence shows that the penetration of zinc oxide and titanium dioxide\nnanoparticles into the skin is negligible and these two have been approved by\nthe FDA as an active ingredient to sunscreen. They can&#8217;t even penetrate the\nstratum corneum (consisted of dead cells) in the outermost layer of the skin.\nYou know, every day, the outermost layer of people&#8217;s skin will strip off millions\nof dead cells.<\/p>\n\n\n\n<p>An Australian\nresearcher recently found that immune cells can collect and decompose zinc\noxide nanoparticles. Simon James, who involved in the study, said: &#8220;Our\nresearch shows that the body&#8217;s immune system has the ability to remove nanoparticles\nthat slip into the skin.&#8221; James is also aware that his research is still\ninadequate due to using cells cultured <em>in vitro<\/em> and nanoparticles that\nare not mixed with sunscreen. He believes that further experiments are needed\nto perfect the conclusion, but we can at least understand that the immune\nsystem does have the ability to degrade zinc oxide nanoparticles.<\/p>\n\n\n\n<p>Other\nresearchers are conducting similar experiments to examine the long-term and\nshort-term effects of metal oxides on the human body. But they also point out\nthat if the skin is not protected, it can be too harmful if it is exposed to\nthe sun for too long; compared with this, other minor injuries are tolerated.<\/p>\n\n\n\n<p>Scientists also say that even if trace amounts of zinc enter the human body, its amount is negligible compared to the existing amount of zinc in blood and tissue. So, sunscreen containing zinc oxide nanoparticles is safe. In any case, the Skin Cancer Foundation believes that the best sunscreen is the one you are most likely to use, as long as it provides safe and effective protection, and is broad spectrum with an SPF 15 or higher. <\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Reference:<br>James, S. A., Feltis, B. N., de Jonge, M. D., Sridhar, M., Kimpton, J. A., Altissimo, M., &#8230; &amp; Paterson, D. J. (2013). Quantification of ZnO nanoparticle uptake, distribution, and dissolution within individual human macrophages. <em>ACS nano<\/em>, 7(12), 10621-10635. <\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Men, women, and children who are more than 6 months old should use sunscreen every day. This includes people who<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[35,34],"class_list":["post-143","post","type-post","status-publish","format-standard","hentry","category-applications","tag-sunscreen","tag-tio2-nanoparticles"],"_links":{"self":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts\/143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/comments?post=143"}],"version-history":[{"count":3,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts\/143\/revisions"}],"predecessor-version":[{"id":183,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts\/143\/revisions\/183"}],"wp:attachment":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/media?parent=143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/categories?post=143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/tags?post=143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}