Medical studies, I believe, exist in a vacuum. They’re unmindful of the past, uncaring of the future, existing only for the moment.How else to explain why scientists and doctors seemingly just ache for contradiction?By the time there is an emergence of a consensus, patients morph into cadavers. OK, a bit of hyperbole there, but you get the point.Here’s the latest evidence on why we should all develop attention deficit when reading these reports (actually, instant amnesia would be even better):Dermatologists have long preached that sunscreens are needed to prevent skin cancer. Now some scientists are questioning that because vitamin D increasingly seems important for preventing and treating many types of cancer.Indeed, some researchers think that splashing on sunscreen may actually contribute to far more cancer deaths than it prevents.Talk about shifting gears with facile ease! Now good ol’ sunshine and vitamin D are supposed to kick butt against lymphoma and cancers of the prostate, lung, colon and — get this –the skin.And here’s the real kicker: Getting enough vitamin D from food and fortified milk alone is hard to do, and supplements are problematic.So it’s best to work on those tans. Scientists now claim even if you get skin cancer, it’s rarely gonna kill you. But prostate, lung or colon cancer could put you on a cemetery shopping spree.Evidently folks now will be healthier and even look healthier. Nothing like a good tan to smooth out the dents in ugly ducklings!Of course, all this could change dramatically when the next study touting the benefits of living on the far side of the moon hits the medical journals. Stay tuned. And get some sun while you can.