A It's certainly true that some scientists are beginning to come round to the view that sunlight has many health-giving qualities, but the general consensus is still that the sun's rays are harmful - after all, they can cause malignant melanoma, or skin cancer.
It's a position that goes against the body of evidence going back to the early 1940s that suggests that regular exposure to sunlight can be protective against many cancers, including those of the breast, colon, ovaries and prostate (Cancer Res, 1995; 55: 4014-22). Sunshine may also prevent diabetes, multiple sclerosis (Toxicology, 2002; 181: 71-8; Lancet, 2001; 358: 1476-8), heart disease, osteoporosis and psoriasis.
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