Comments on: Safe To Moisturize At Night If It Has Sunscreen In It? http://www.moisturizeranswers.info/861/safe-to-moisturize-at-night-if-it-has-sunscreen-in-it.htm Everything you want to know about moisturizer Tue, 07 Sep 2010 11:16:37 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: ♥ Shōjo-ai http://www.moisturizeranswers.info/861/safe-to-moisturize-at-night-if-it-has-sunscreen-in-it.htm/comment-page-1#comment-4209 ♥ Shōjo-ai Thu, 31 Dec 2009 19:27:40 +0000 http://www.moisturizeranswers.info/861/safe-to-moisturize-at-night-if-it-has-sunscreen-in-it.htm#comment-4209 No, you shouldn't use it unless you use a LOT of it...http://www.livescience.com/health/060829… Sunscreen Can Damage Skin if Applied Infrequently By LiveScience Staff posted: 29 August 2006 02:38 pm ET When used properly, sunscreens are proven to prevent skin damage. But if not applied often enough, a sunscreen can actually enhance skin damage, according to a new study. Ultraviolet (UV) radiation from the sun is absorbed by skin molecules & generates reactive oxygen species, or ROS molecules, which cause visible signs of aging by damaging cell walls & the DNA inside them. Too much sun, especially in childhood, increases the risk of skin cancer. Sunscreens contain UV filters that block radiation from penetrating below the outer skin later, called the epidermis. But over time, the filters themselves penetrate deeper into the skin, allowing more UV radiation in. Then things get worse. In the new study, scientists found that three widely used, FDA-approved UV filters (octylmethoxycinnamate, benzophenone-3 & octocrylene) actually generate ROS in skin when exposed to ultraviolet radiation. So the sun's damaging effect is multiplied when the sunscreen has been on too long. [Graphic] "Sunscreens do an excellent job protecting against sunburn when used correctly," said chemist Kerry Hanson of the University of California, Riverside. "This means using a sunscreen with a high sun protection factor [SPF] & applying it uniformly on the skin. Our data show, however, that if coverage at the skin surface is low, the UV filters in sunscreens that have penetrated into the epidermis can potentially do more harm than good." Hanson & colleagues applied sunscreen to model skin tissue & imaged its travels into deeper layers & the effects. "More advanced sunscreens that ensure that the UV-filters stay on the skin surface are needed," Hanson said. Also, the researchers note that while most sunscreens block one wavelength-band of ultraviolet radiation, called UVB, few block the deeper-penetrating UVA. The federal government just approved in July a UVA blocker for use in the United States. Meanwhile, the scientists have passed along the advice of the Skin Cancer Foundation, which recommends reapplying sunscreen every two hours, & especially after sweating or swimming. The study, announced today & funded by the National Science Foundation & the National Institutes of Health, will be detailed in the journal Free Radical Biology & Medicine. No, you shouldn’t use it unless you use a LOT of it…http://www.livescience.com/health/060829…
Sunscreen Can Damage Skin if Applied Infrequently
By LiveScience Staff
posted: 29 August 2006 02:38 pm ET
When used properly, sunscreens are proven to prevent skin damage. But if not applied often enough, a sunscreen can actually enhance skin damage, according to a new study.
Ultraviolet (UV) radiation from the sun is absorbed by skin molecules & generates reactive oxygen species, or ROS molecules, which cause visible signs of aging by damaging cell walls & the DNA inside them. Too much sun, especially in childhood, increases the risk of skin cancer.
Sunscreens contain UV filters that block radiation from penetrating below the outer skin later, called the epidermis.
But over time, the filters themselves penetrate deeper into the skin, allowing more UV radiation in.
Then things get worse.
In the new study, scientists found that three widely used, FDA-approved UV filters (octylmethoxycinnamate, benzophenone-3 & octocrylene) actually generate ROS in skin when exposed to ultraviolet radiation. So the sun’s damaging effect is multiplied when the sunscreen has been on too long. [Graphic]
“Sunscreens do an excellent job protecting against sunburn when used correctly,” said chemist Kerry Hanson of the University of California, Riverside. “This means using a sunscreen with a high sun protection factor [SPF] & applying it uniformly on the skin. Our data show, however, that if coverage at the skin surface is low, the UV filters in sunscreens that have penetrated into the epidermis can potentially do more harm than good.”
Hanson & colleagues applied sunscreen to model skin tissue & imaged its travels into deeper layers & the effects.
“More advanced sunscreens that ensure that the UV-filters stay on the skin surface are needed,” Hanson said.
Also, the researchers note that while most sunscreens block one wavelength-band of ultraviolet radiation, called UVB, few block the deeper-penetrating UVA. The federal government just approved in July a UVA blocker for use in the United States.
Meanwhile, the scientists have passed along the advice of the Skin Cancer Foundation, which recommends reapplying sunscreen every two hours, & especially after sweating or swimming.
The study, announced today & funded by the National Science Foundation & the National Institutes of Health, will be detailed in the journal Free Radical Biology & Medicine.

]]> By: Mary http://www.moisturizeranswers.info/861/safe-to-moisturize-at-night-if-it-has-sunscreen-in-it.htm/comment-page-1#comment-4208 Mary Thu, 31 Dec 2009 16:05:05 +0000 http://www.moisturizeranswers.info/861/safe-to-moisturize-at-night-if-it-has-sunscreen-in-it.htm#comment-4208 Although wearing sunscreen at night itself is not dangerous, I wouldn't recommend slathering unncessary chemicals all over your skin. Most sunscreens are chemicals; they work by reacting with your skin to block UV ray penetration. Personally, I would use a mineral sunblock rather than a chemically based one; they're equally effective but the mineral ones are much safer (see above post also!). There's no risk of them penetrating the skin & causing harm rather than good. A good mineral sunscreen is TruKid Sunny Days, they also make an all natural lotion that might be good for just night time :) Although wearing sunscreen at night itself is not dangerous, I wouldn’t recommend slathering unncessary chemicals all over your skin. Most sunscreens are chemicals; they work by reacting with your skin to block UV ray penetration. Personally, I would use a mineral sunblock rather than a chemically based one; they’re equally effective but the mineral ones are much safer (see above post also!). There’s no risk of them penetrating the skin & causing harm rather than good. A good mineral sunscreen is TruKid Sunny Days, they also make an all natural lotion that might be good for just night time :)

]]>