#Sun corona in day light skin#
“Too much exposure suppresses the ability of the human immune system to efficiently detect and attack malignant cells,” which can increase the risk of skin cancer, Dr. Manson said.īut the fact that a little sunlight is good for health does not mean that a lot is better. The list of benefits from physical activity is extensive.” Moreover, sun exposure enables the skin to create nitric oxide, which lowers blood pressure and improves cardiovascular health, Dr. “Being physically active outdoors helps people to maintain proper weight, reduces the risk of diabetes and heart disease, benefits bone health, lowers stress and improves emotional well-being. Manson said, and to spend time outdoors in the fresh air and sunlight. “The best approach is to have a heart-healthy diet and get the nutrients from foods,” Dr. JoAnn Manson, the chief of preventive medicine at Brigham and Women’s Hospital in Boston and a Harvard professor, says that the jury is still out on optimal levels of vitamin D, though some people might benefit from supplements “to hedge their bets.” But consult your doctor before doing so, since high doses can cause kidney problems and other complications.ĭr. Overweight people, he says, may need extra high doses. Holick recommends to many of his patients that they take supplements of vitamin D. Holick and colleagues reported that vitamin D boosts the expression of hundreds of genes that are thought to help regulate immune function.ĭr. While the mechanisms of its action are still not fully understood, a study published last year by Dr. And that’s a problem, he says, because too little vitamin D can weaken our body’s ability to fight off infections. Michael Holick, a professor of medicine at Boston University. Over half of Americans do not produce enough vitamin D, a result of spending some 90 percent of our time indoors, according to Dr. “There is now limited but convincing evidence that moderate sunlight exposure is capable of modulating the immune system and improving health,” said Daniel González Maglio, a professor at the University of Buenos Aires and researcher in the growing field of photo-immunology.Įnthusiasm for sunlight as medicine waned after antibiotics began to be widely used during the 1930s, but it has recently revived, as evidence mounts for the complex role that vitamin D - sometimes called the sunshine vitamin, because the skin creates it when exposed to sunlight - plays in human biology. “I hope they don’t close the parks,” she said. Penman was one of many who were maintaining a safe distance between themselves and others while they walked in Riverside Park on a recent afternoon. “Yesterday it was raining and we felt kind of sorry for ourselves, but it’s hard to feel sorry for yourself on a sunny day like today,” said Nancy Penman, a resident of Manhattan’s Upper West Side. For many, however, the enticements of a spring day are too powerful to resist. Deciding whether to head outdoors or to stay at home has never before felt so fraught, as many of us continue the weigh the benefits of getting some fresh air versus the risks of getting sick.
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