Sunscreen: Health Effects


	Sunscreen: Health Effects

kmcolo

1-14-2008 4:12 PM

285 views

tags:

health, sunscreen, science, hormones, endocrine

kmcolo says:

Little (and disputed) evidence of negative effects of absorbed sunscreens. Might lead to feminization of bodily hormone mixture but this is not verified in other study.

Don't worry about sunscreens preventing vitamin D production.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/b7318a23-71ab-4f59-afcd-90278039e39a/CE32EB52-2CD5-48ED-8A24-22460A20996C/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T1B-4NMV030-1&_user=918210&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000047944&_version=1&_urlVersion=0&_userid=918210&md5=027df1fd7bcd5f0563c38d60429f6889" href="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T1B-4NMV030-1&_user=918210&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000047944&_version=1&_urlVersion=0&_userid=918210&md5=027df1fd7bcd5f0563c38d60429f6889" style="font-size: 11px;">www.sciencedirect.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T1B-4NMV030-1&_user=918210&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000047944&_version=1&_urlVersion=0&_userid=918210&md5=027df1fd7bcd5f0563c38d60429f6889">90% of all requisite vitamin D is formed within the skin through the action of ultraviolet radiation. Several studies have suggested a connection between vitamin D deficiency and over a dozen forms of cancer (eg, colon, breast, prostate)<A name="bbib114"></A><A href="#bib114"><SUP>[114]</SUP></A><SUP> and </SUP><A name="bbib115"></A><A href="#bib115"><SUP>[115]</SUP></A> and recently also for malignant melanoma.<A name="bbib116"></A><A href="#bib116"><SUP>116</SUP></A> </blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T1B-4NMV030-1&_user=918210&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000047944&_version=1&_urlVersion=0&_userid=918210&md5=027df1fd7bcd5f0563c38d60429f6889">There are also concerns about the endocrine effect of ultraviolet filters. Five chemicals—benzophenone-3, homosalate, 4-methyl-benzylidene camphor, octyl-methoxycinnamate, and octyl-dimethyl-PABA—increased breast cancer cell proliferation in vitro,<A name="bbib86"></A><A href="#bib86"><SUP>86</SUP></A> whereas butyl-methoxydibenzoylmethane was inactive.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T1B-4NMV030-1&_user=918210&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000047944&_version=1&_urlVersion=0&_userid=918210&md5=027df1fd7bcd5f0563c38d60429f6889">Further data indicated that the ultraviolet filters benzophenone-3 and homosalate possess antiandrogenic activity in vitro<A name="bbib122"></A><A href="#bib122"><SUP>122</SUP></A> in addition to oestrogenic activity.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T1B-4NMV030-1&_user=918210&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000047944&_version=1&_urlVersion=0&_userid=918210&md5=027df1fd7bcd5f0563c38d60429f6889">Questions have been raised about the methodological grounds used.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T1B-4NMV030-1&_user=918210&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000047944&_version=1&_urlVersion=0&_userid=918210&md5=027df1fd7bcd5f0563c38d60429f6889">Furthermore, a study on 32 people</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T1B-4NMV030-1&_user=918210&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000047944&_version=1&_urlVersion=0&_userid=918210&md5=027df1fd7bcd5f0563c38d60429f6889">applied to their whole body daily for 5 days did show uptake in the body but no effects on reproductive hormone levels.</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/CE32EB52-2CD5-48ED-8A24-22460A20996C/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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