• Most dermatologists recommended using a sunscreen of the SPF 30 or greater achieve maximum protection.
  


• Another fact to keep in mind is while sunscreens have been proven effective for limited time in the sun to protect against acute UV skin damage and non-melanoma skin cancers.

• It's not clear whether or not they do help protect against melanoma, which is the most dangerous form of skin cancer.
  


• As most sun worshipers already know, different times of the day represent different health risk for your skin as far as the degree of the intensity of the sun's rays.
  


• I came across a neat little rule for determining when the sun's rays are the most dangerous for your skin it goes like this... "The shorter your shadows, the more dangerous, the rays of the sun are for your skin".
  


• The example of this would be, at noon when the sun is at its highest point you will have a very little shadow or no shadow at all. This would be the best time to stay out of direct sunlight, if at all possible.