Posted on 01/01/2014 1:17:48 PM PST by SeekAndFind
For some reason you are in denial that UVA can cause DNA damage, a scientific fact. As I said UVA and UVB cause different patterns of DNA damage, i.e. they are affecting different chemical bonds, thus requiring somewhat different energies. And you've ignored my pointing out that biological consequences can happen through light altering more than just DNA, with there being many well characterized skin conditions with action spectrums ranging from the short UV well into the visible spectrum and in some cases even into the infrared. Also well established scientific facts.
What is YOUR ulterior reason? So far all I know about you is your handle, the second half of which coincidentally and colloquially refers to a sign of chronic UVA damage its microscopic changes exist at a depth UVA, but not UVB, reaches. I have nothing against "rednecks." I have plenty of nice patients who have them. But you seem to have a fixed bias that UVA cannot possibly cause any harm. Perhaps you should consider your own, almost certainly more limited experience regarding the effects of UV on the skin.
I've been freeping for a long time. I don't recall any other Dermatologist Freepers. So when I see a subject that relates to my expertise, which I imagine might interest some other Freepers, I tend to pitch in my two cents. Or twenty cents. I am guilty of verbosity at times. I've learned a wide range of interesting trivia here over the years from the impressive folks JimRob has collected here. I try to pay back by sharing what I know. If you're not interested in my points ignore me, but I don't believe I've posted anything deserving an insulting response.
Happy New Year!
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.