Dead Sea Herbs

Coinciding with the first week of summer, a study published today underscores the importance of getting adequate amounts of sunlight for its vitamin D-boosting benefits. The research, published in the Archives of Internal Medicine, shows that those with the lowest vitamin D levels have more than double the risk of dying from heart disease and other causes over an eight-year period compared with those with the highest vitamin D levels. The researchers cite “decreased outdoor activity” as one reason that people may become deficient in vitamin D. Another recent study found an increased risk of heart attacks in those with low vitamin D levels.

The sunshine vitamin may protect against a host of diseases, including osteoporosis, heart disease, and cancers of the breast, prostate, and colon. What’s more, sunlight has other hidden benefits—like protecting against depression, insomnia, and an overactive immune system.

Given all the upsides of basking at least briefly in the summer sun, many experts now worry that public-health messages warning about skin cancer have gone overboard in getting people to cover up and seek the shade. U.S. News got in touch with Robyn Lucas, an epidemiologist at Australian National University who led a study published in the February issue of the International Journal of Epidemiology . Her finding: Far more lives are lost to diseases caused by a lack of sunlight than to those caused by too much.

Sun protection messages arose in response to rapidly increasing rates of skin cancers, and they were an essential public-health message. But we now recognize that some sun exposure is important for health, at the very least, to maintain healthful vitamin D levels. (Sunscreen blocks out nearly all UV radiation.) Taking this into account, the Cancer Council of Australia has eased its sun protection message a little over the last few years and now recommends that if you’re out in the sun for relatively short periods, with a UV index less than 3, which indicates a moderate amount of UV rays hitting your area on a given day, then sunscreen and other sun protection (like hats and protective clothing) are not required. Beyond this, I believe we all need a little unprotected time in the sun during the middle hours of the day when the sun is at its highest and UV-B rays can penetrate the atmosphere.