Something about sunscreen
Why UVA is considered as so bad? Even at low level exposure has been found to be worst for skin. It erodes the skin’s support structure, breaking down collagen which leads to form wrinkles and sagging. Scientists have found that UVA penetrates deep into the underlying support structure of the skin.
An SPF of at least 15 which contains avobenzone, titanium dioxide or zinc oxide is considered as a good sunscreen.
Application of Sunscreen: You should apply sunscreen properly. It should be applied liberally enough to all sun-exposed areas. One should apply it half an hour before going outside.
Daily application of sunscreen has been shown to be more effective in preventing skin damage.