tag:blogger.com,1999:blog-6010505890506526002.post5858021482082696229..comments2024-03-28T07:04:52.697-04:00Comments on Just Like Cooking: Sunscreen Chemophobia: OxybenzoneSee Arr Ohhttp://www.blogger.com/profile/09464185815368499346noreply@blogger.comBlogger12125tag:blogger.com,1999:blog-6010505890506526002.post-75505057731515386942020-05-21T08:57:46.327-04:002020-05-21T08:57:46.327-04:00Sunscreen Chemophobia kemchongnang.topSunscreen Chemophobia <a href="https://kemchongnang.top/" rel="nofollow">kemchongnang.top</a>kemchongnanghttps://www.blogger.com/profile/09360997511583009511noreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-50626190085537464272014-05-08T22:16:48.728-04:002014-05-08T22:16:48.728-04:00Oxybenzone is in my CVS sunscreen I have been usin...Oxybenzone is in my CVS sunscreen I have been using for 2 1/2 half years. Been through a lot more bottles than most people in florida since I work in the sun! I put it on each 30-40minutes 7 times a day 5 days a week and I am wondering why I have Hashimotos disease now? So just wondering if they would test me to see how much oxybenzone levels I have in my system! Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-60989290514532870302013-06-06T18:56:42.374-04:002013-06-06T18:56:42.374-04:00How long do these chemicals remain stable and acti...How long do these chemicals remain stable and active? I've heard they aren't photostable, but am curious rates of reduced efficacy. Unknownhttps://www.blogger.com/profile/09599650554821201264noreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-30154990186340342712012-08-14T02:01:44.020-04:002012-08-14T02:01:44.020-04:00Very interesting. I hadn't read any rebuttals ...Very interesting. I hadn't read any rebuttals to the EWG claims. <br /><br />Just wondering if you had any theories as to why the skin cancer rates have increased despite the widespread use of sunscreens? Thanks!<br /><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-32141248270026814572012-05-30T11:47:53.428-04:002012-05-30T11:47:53.428-04:00Wow! Someone has definitely done their homework! T...Wow! Someone has definitely done their homework! This is a very informative post. I am going to have to check out some of these websites you referenced starting with TOXNET.Suzanne Holthttp://www.suzanneholt.comnoreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-50070647680966655762012-05-21T21:06:34.422-04:002012-05-21T21:06:34.422-04:00But, but...TiO2 is a *gasp* chemical! We can't...But, but...TiO2 is a *gasp* chemical! We can't have those in our all-natural 100% chemical-free sunscreens, can we?<br /><br />It's all about the evil chemicals. Save the whales, ban the dihydrogen monoxide!Claire Phttps://www.blogger.com/profile/02477579158022843480noreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-58568124568000723902012-05-21T17:53:00.715-04:002012-05-21T17:53:00.715-04:00Remember though Anon7:57... simply detecting analy...Remember though Anon7:57... simply detecting analytes in matrices says nothing of their toxicity. Look no further than the pharmaceuticals being "detected" in drinking water. Yeah they're there, but at upwards of 5,000,000x below therapeutic doses, are they causing harm? Instruments these days may becoming too sensitive for their own good.Aquanerd09https://www.blogger.com/profile/14204256132619056927noreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-30498434476428153882012-05-21T10:09:47.398-04:002012-05-21T10:09:47.398-04:00Great post. As an aside, I find it interesting th...Great post. As an aside, I find it interesting that "synthetic Vitamin A" made the naughty list. I suppose natural Vitamin A is OK? Because it is magically different.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-19108564988612832642012-05-21T08:13:32.210-04:002012-05-21T08:13:32.210-04:00@Anon7:57 - Thanks for the heads up with the paper...@Anon7:57 - Thanks for the heads up with the papers and links. I do mention in my piece that repro-tox was noted, but almost none at the lowest doses. <br /><br />To your specific comments - the EHP paper (link 1) was one I had seen. The BP-3 is shown to be weakly estrogenic at 1,525 mg/kg/day. That's a huge amount of compound! Also, relative to the Vanderberg review (whose author, I note, has been behind many such releases), why have more clinical trials not been run at these lowered concentrations? (Again, lowest I've seen is 1,000 ppm)See Arr Ohhttps://www.blogger.com/profile/09464185815368499346noreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-3223655815512991152012-05-21T07:57:42.285-04:002012-05-21T07:57:42.285-04:00While you're entitled to your pejoratives, you...While you're entitled to your pejoratives, you should at least cite the peer-reviewed literature that's established the estrogenic activity of benzophenone (Bp-3). See for example: http://ehp03.niehs.nih.gov/article/fetchArticle.action?articleURI=info%3Adoi%2F10.1289%2Fehp.01109239.<br /><br />In that study, Bp-3 elicited dose-dependent cell proliferation in a breast cancer cell assay and dose-dependent increases in uterine weight in immature lab animals in an in vivo estrogenicity assay. <br /><br />Human exposure to Bp-3 is routine: "The UV screen benzophenone-3 (Bp-3) and its metabolite 2,4-dihydroxybenzophenone have been detected in human urine from 4 hr after application of commercially available sunscreen products to the skin (7,10). Bp-3 has also been found to be readily absorbed from the gastrointestinal tract (11). Evidence for bioaccumulation in humans stems from analyses of human milk (12). In five out of six samples of human milk, Bp-3 and/or octyl methoxycinnamate were present in detectable amounts."<br /><br />Before you reflexively dismiss low-dose effects of endocrine active compounds, for which the timing makes the poison not simply the dose, you should catch up on your science and review Vandenberg et al. (2012) in Endocrine Reviews. http://edrv.endojournals.org/content/early/2012/03/14/er.2011-1050.abstract.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-41891215747977679932012-05-20T22:41:32.638-04:002012-05-20T22:41:32.638-04:00@Matt - I am by no means an expert. Actually (iron...@Matt - I am by no means an expert. Actually (ironically), the EWG's sunscreen recommendations correctly extrapolate the coverage for each sunscreen, based on active ingredients. Oxybenzone actually absorbs over a wider range than many of the other aromatics (Padimate O, 310nm, Homosalate, 309nm, PABA, 290-320nm). Many sunscreens (Coppertone sport, Banana Boat) use several aromatics together to cover a wide range of UV.<br /><br />The best sunscreens use a mix of inorganic (zinc, TiO2) and organic filters. The metals seem to screen out most of the UV-A (320-400nm), and some of the UV-B. The DNA damage is thought to come from UV-B, but since UV-A penetrates further into skin, some believe there's yet-to-be ascertained damage it can cause.See Arr Ohhttps://www.blogger.com/profile/09464185815368499346noreply@blogger.comtag:blogger.com,1999:blog-6010505890506526002.post-57372188965789231972012-05-20T20:14:26.468-04:002012-05-20T20:14:26.468-04:00Is oxybenzone's absorbance in the UV high enou...Is oxybenzone's absorbance in the UV high enough to make it useful? Where does coverage of the other chemicals fall off? Does a sunscreen without oxybenzone increase your risk of DNA damage? What other compounds are used to replace it?<br /><br />(Sorry - lots of questions .. I really enjoyed your post)Matthttp://sciencegeist.netnoreply@blogger.com