Comments on: Anti-aging: chemical or physical sunscreens? http://www.vivawoman.net/2008/05/05/anti-aging-chemical-or-physical-sunscreens/ Natural Beauty Inside Out Sat, 21 Nov 2009 02:28:23 -0800 hourly 1 By: David Chapman http://www.vivawoman.net/2008/05/05/anti-aging-chemical-or-physical-sunscreens/comment-page-1/#comment-240002 David Chapman Wed, 06 Aug 2008 23:35:09 +0000 http://www.vivawoman.net/?p=740#comment-240002 Zinc and titanium oxide do generate free radicals in the sun (http://cat.inist.fr/?aModele=afficheN&cpsidt=16058961). Whether they generate more/less better/worse ones is anyone's guess, it seems. It is frustrating that regulators do not require manufacturers to do decent research in this area. <font color="#990033"><strong>David</strong>: Yes, I read about this but there isn't anything concrete. But I wonder if the fact that these are physical blockers and they do not penetrate the skin like chemical sunscreens mean any free radicals they generate may cause lesser damage? Btw, I tried to get into the link you've provided but it said bad record number. </font> Zinc and titanium oxide do generate free radicals in the sun (http://cat.inist.fr/?aModele=afficheN&cpsidt=16058961). Whether they generate more/less better/worse ones is anyone’s guess, it seems. It is frustrating that regulators do not require manufacturers to do decent research in this area.

David: Yes, I read about this but there isn’t anything concrete. But I wonder if the fact that these are physical blockers and they do not penetrate the skin like chemical sunscreens mean any free radicals they generate may cause lesser damage? Btw, I tried to get into the link you’ve provided but it said bad record number.

]]>