(12-12-2013 01:13 PM)mtl777 Wrote: Hi James, does sunlight really cause wrinkles and skin cancer, or is sunlight actually good and cancer-preventive because it helps produce vitamin D?
If sunlight is good, is it safe to use a UV-B lamp instead whenever sunlight is not available? If yes, is there a particular UV-B lamp product brand that you recommend?
Thanks as always for your most appreciated reply!
I am not sold on the claim that sunlight causes wrinkles. Wrinkles result from a decline in skin elastin. The loss of elastin leads to a decrease in skin elasticity, which causes the skin to stretch then sag.
Loss of elastin is most often from lack of silica and vitamin C.
I know the medical establishment thinks that free radicals cause wrinkles but there is more to the story. For example, vitamin C happens to be an antioxidant. In fact, smokers are also more prone to wrinkles not because of free radical production, but rather because smoking reduces vitamin C levels leading to elastin loss.
As far as cancer goes, sunlight is not a cause but rather a co-factor. Skin cancer is the result of human papilloma virus (HPV) infections of the skin. Sunlight activates the HPV virus.
This also helps explain in large part why not everyone that spends a lot of time in the sun develops skin cancer. For example, I used to do cross county bicycling and 12-14 hour days in the sun were common. But I never got skin cancer or wrinkles for that matter.
Sun exposure also does increase vitamin D levels, which is anti-cancer.
Lamps are a good alternative. In fact they have a long history of being used to generate vitamin D especially in children in countries who receive little to no sunlight during winter months.
I don't have any recommendations though as I have never really looked in to these lamps.