Originally Posted by
EqualOpp
blood is 80% water...UV light enters through our eyes and is through the skin too. Although the amount varies based on our diet. This UV light will kill viruses/bacteria INside our body.
* Who told you our body / eyes doesn't absorb UV?
Google - DIET SUNBURN or I can provide appropriate links.
To learn more about how diet affects affinity to sunburn / eye degeneration / eye fogging (Cataracts). It has to do with the level of metals in our body - IRON, ZINC, COBALT (Vitamin B-12), CHROMIUM, etc......also heme iron vs non-heme iron.
The primary ingredient in sunscreen is TITANIUM DIOXIDE, or sometimes IRON Oxide, or Zinc Oxide...google - how sunscreen works.
Guess what..the level of metals inside our body inhibits / reflects UV light / absorption and then causes our skin to heat up from the inside out! Burn!
Simple "science" -- but from - inside out thinking...
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Wearing lighter fabrics / lighter colored clothing as well to allow more UV light...but if that is impractical, then start with the eyes...or rather start with shedding the "eye protection" we have been CONned into buying...
Also another reason to GO OUTSIDE or open home/car windows, as UV light is blocked by windows as well...unless you have a special kind of window, which is pretty rare. We're sold on the idea that tinted windows are good for us....
Only if someone is at altitude climbing / hiking (10,000 ft+) for a sustained period might there be a concern, but again, a proper diet will solve this problem too....but that is another story.
Skin, as I acknoweldged, is exposed to UV (hence the acne example). UV light does not penetrate through all the layers of skin, muscle, bones and other tissue into e.g. the lungs to kill the bacteria as it would e.g. on a petri dish exposed to UV. Eyes are especially sensitive to UV which is why eye protection should be worn - but UV absorbed by the eye cells doesn't make it's way through the body to the respiratory tract etc.
Zinc, Titanium etc. are physical barriers of the metal particals, if you wrapped aluminium foil around the arm it would have a not disimmilar effect. Zinc used as a barrier on the outside doesn't really relate to the zinc within our bodies. The zinc within our bodies isn't anywhere near the concentration / partical size of sunscreen.
Zinc, iron, etc. are all essentiall to our make up - neither too much nor too little are good for it (hence RDAs etc).
Wearing lighter coloured clothes will reflect some of the sunlight, so yes, they are an excellent way of reducing the amount of UV.
UV travels right through normal windows - it is rare for windows to have full UV coating (my home does, and it cost quite a bit more than regular glass).
I wish I had read your post yesterday when I was sitting in a waiting room full of people with skin cancers, and show it to my dermatologist - he would have laughed his socks off at the idea that diet is enough to stop fair skinned folk here from burning in in strong summer sun.