Just how long have you been using sunscreen. I never used the stuff until about 15 years ago at the constant pressure by the wifey, bless her heart. I'm almost 60! She's a stickler now but I remember the day when her n the girls layed on the edge of the lake with baby oil on them! They looked great. There ain't no tannin booth made that can immitate the dark brown tan Ol Motha Nature produces.
Well I found this tid-bit today for my Old Stoner Friends..cheers..DD
from: http://www.examiner.com/article/sunscreen-may-cause-not-prevent-cancer
Sunscreen may cause, not prevent skin cancer
Scott Johnson
Healthy Living Examiner
As summer weather grows closer, more and more people are heading outdoors, exposing their bodies to the glowing sunshine. And according to materials released May 7, 2012 by researchers at Missouri University of Science and Technology sunscreen may not be protecting you from skin cancer—in fact, it may be causing it.
While some sun exposure can be enjoyable and even beneficial—like aiding your body’s production of vitamin D—too much can be very harmful. Both ultraviolet A (UVA) and ultraviolet B (UVB) radiation from the sun can result in sunburn, skin aging or problems and suppression of your immune system.
Sunscreens use active ingredients that either block absorption of harmful UV rays—physical—or absorb UV rays as they attempt to pass through them—chemical. Physical sunscreens are effective immediately, whereas chemical-based sunscreens take 20 to 30 minutes to be effective. Commonly used active ingredients in physical sunscreens include zinc oxide and titanium dioxide. Chemical sunscreens use a wide range of chemicals that block UVA, UVB or both rays at varying degrees.
According to the materials, Dr. Yinfa Ma, Curator’s Teaching Professor of Chemistry at Missouri University of Science and Technology, and his graduate student Quingbo Yang, discovered that zinc oxide undergoes a chemical reaction when exposed to sunlight that may release free radicals.
Free radicals are unstable molecules that cause damage to cells and DNA, leading to an assortment of diseases, such as cancer, Alzheimer’s disease and heart disease.
Ma and Yang suggest that this action could increase the risk of skin cancer. They studied how cells immersed in a zinc oxide solution reacted to exposure to UV light. They found that when these cells were exposed to UVA for three hours half of the cells died, whereas 90 percent of the cells died after 12 hours of exposure. All cells exposed to zinc oxide deteriorated more rapidly than those not immersed in the compound.
The researchers caution that their research is in the early stages and that wearing sunscreen is better than the alternative of full exposure to UV rays.
Other ways to protect yourself from the sun include wearing a wide-brimmed hat and clothing that offers greater coverage, limiting your sun exposure from 10:00 a.m. to 4:00 p.m. and protecting your eyes with sunglasses.
Ma’s research will be published in Toxicology and Applied Pharmacology, though no publication date has been set as of this writing.
Well I found this tid-bit today for my Old Stoner Friends..cheers..DD
from: http://www.examiner.com/article/sunscreen-may-cause-not-prevent-cancer
Sunscreen may cause, not prevent skin cancer
Scott Johnson
Healthy Living Examiner
As summer weather grows closer, more and more people are heading outdoors, exposing their bodies to the glowing sunshine. And according to materials released May 7, 2012 by researchers at Missouri University of Science and Technology sunscreen may not be protecting you from skin cancer—in fact, it may be causing it.
While some sun exposure can be enjoyable and even beneficial—like aiding your body’s production of vitamin D—too much can be very harmful. Both ultraviolet A (UVA) and ultraviolet B (UVB) radiation from the sun can result in sunburn, skin aging or problems and suppression of your immune system.
Sunscreens use active ingredients that either block absorption of harmful UV rays—physical—or absorb UV rays as they attempt to pass through them—chemical. Physical sunscreens are effective immediately, whereas chemical-based sunscreens take 20 to 30 minutes to be effective. Commonly used active ingredients in physical sunscreens include zinc oxide and titanium dioxide. Chemical sunscreens use a wide range of chemicals that block UVA, UVB or both rays at varying degrees.
According to the materials, Dr. Yinfa Ma, Curator’s Teaching Professor of Chemistry at Missouri University of Science and Technology, and his graduate student Quingbo Yang, discovered that zinc oxide undergoes a chemical reaction when exposed to sunlight that may release free radicals.
Free radicals are unstable molecules that cause damage to cells and DNA, leading to an assortment of diseases, such as cancer, Alzheimer’s disease and heart disease.
Ma and Yang suggest that this action could increase the risk of skin cancer. They studied how cells immersed in a zinc oxide solution reacted to exposure to UV light. They found that when these cells were exposed to UVA for three hours half of the cells died, whereas 90 percent of the cells died after 12 hours of exposure. All cells exposed to zinc oxide deteriorated more rapidly than those not immersed in the compound.
The researchers caution that their research is in the early stages and that wearing sunscreen is better than the alternative of full exposure to UV rays.
Other ways to protect yourself from the sun include wearing a wide-brimmed hat and clothing that offers greater coverage, limiting your sun exposure from 10:00 a.m. to 4:00 p.m. and protecting your eyes with sunglasses.
Ma’s research will be published in Toxicology and Applied Pharmacology, though no publication date has been set as of this writing.
