fistfullofsteel
New member
http://www.neutrogena.com/content_169.asp I have Neutrogena Ultra Sheer™ Dry-Touch Sunblock SPF 55 & 70. It's $10, but it comes in a 5 oz spray bottle, so you use it up fast.
A chemical stabilizer is included in sunscreens containing avobenzone to slow breakdown. Avobenzone is also the only ingredient that blocks only UVA.
The best UVA protection is provided by products that contain zinc oxide, avobenzone, and ecamsule. Titanium dioxide probably gives good protection, but does not completely cover the entire UV-A spectrum.
Results of sunscreen testing
PABA, phenylbenzimidazole sulfonic acid, and avobenzone have photomutagenic or photogenotoxic effects.
In photocarcinogenicity tests, 4 compounds (Meroxyl SX, 2-ethylhexyl-paramethoxycinnamate, 3-benzoyl-4-hydroxy-6-methoxybenzenesulfonic acid, and titanium dioxide), have been found to protect against the development of cancer in hairless mice.[26]
No sunscreen ingredient has been found to be photocarcinogenic. [26]
In August 2007, The United States FDA proposed to disallow manufacturer claims on bottles that using sunscreens prevents cancer and to change SPF to refer to Sunburn Protection Factor instead of Sun Protection Factor (FDA proposed changes). This was done due to the epidemiological results in conjunction with some mechanistic studies which show that sunscreens prevent inflammation only and not necessarily the causes of melanoma.
http://en.wikipedia.org/wiki/Suntan_lotion
here is another great read with sunscreen product reviews
http://www.consumersearch.com/www/family/sunscreen/review.html
A chemical stabilizer is included in sunscreens containing avobenzone to slow breakdown. Avobenzone is also the only ingredient that blocks only UVA.
The best UVA protection is provided by products that contain zinc oxide, avobenzone, and ecamsule. Titanium dioxide probably gives good protection, but does not completely cover the entire UV-A spectrum.
Results of sunscreen testing
PABA, phenylbenzimidazole sulfonic acid, and avobenzone have photomutagenic or photogenotoxic effects.
In photocarcinogenicity tests, 4 compounds (Meroxyl SX, 2-ethylhexyl-paramethoxycinnamate, 3-benzoyl-4-hydroxy-6-methoxybenzenesulfonic acid, and titanium dioxide), have been found to protect against the development of cancer in hairless mice.[26]
No sunscreen ingredient has been found to be photocarcinogenic. [26]
In August 2007, The United States FDA proposed to disallow manufacturer claims on bottles that using sunscreens prevents cancer and to change SPF to refer to Sunburn Protection Factor instead of Sun Protection Factor (FDA proposed changes). This was done due to the epidemiological results in conjunction with some mechanistic studies which show that sunscreens prevent inflammation only and not necessarily the causes of melanoma.
http://en.wikipedia.org/wiki/Suntan_lotion
here is another great read with sunscreen product reviews
http://www.consumersearch.com/www/family/sunscreen/review.html
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