A study finds you may actually raise your risk of cancer if you slather on sunblock. Dr. Robert Heaney, a researcher at Creighton University, says sunscreen has been hyped as being a preventer of skin cancer, which he says is simply false, while he says a little sun is good for you.He says the only reason to use sunblock is to prevent oneself from getting dry, wrinkled, leathery skin from repeated sunburns. Heaney says people who use sunblock can keep the harmful rays of the sun from penetrating their skin, but sunblock also blocks vital Vitamin-D, which is healthy and helps regulate cell growth. Heaney says people don’t realize they’re “trading off a fear of a cancer that probably is unfounded for one that they may not have thought about and that may, in fact, be a lot more important.” He says the chances of developing colon, prostate or breast cancer are greater for people who have deficiencies in Vitamin-D, something the body gets from sun exposure.Heaney says people can go ahead and use sunblock to avoid getting burned, but he recommends it -not- be put on right away.Heaney says to take routine outdoor exposures unprotected. If you’ll be out for a long time, he says to wait until you get a “mild pinkness” and then put the sunblock on. He says you should give yourself at least ten minutes of sun exposure before putting on the lotion, to soak in plenty of Vitamin-D.