SMART TAN EDUCATION - Author Dr. Marc Sorenson the author of Solar Power believes that "sunlight and vitamin D may save your life! Sunlight profoundly lessens the risk of breast cancer, prostate, colon and other major cancers. Sunlight and/or VitD aids in relieving depression, cronic pain & increases muscle strength. S...unscreens are over used today - they should prevent SUNBURN but NOT regular sun exposure.