How sunshine helps

https://www.nytimes.com/2020/04/28/well/live/coronavirus-sunlight-uv-stress-mood-immune-system-vitamin-D.html

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The best approach is to have a heart-healthy diet and get the nutrients from foods,” Dr. Manson said, and to spend time outdoors in the fresh air and sunlight. “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. 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. Manson said.

But the fact that a little sunlight is good for health does not mean that a lot is better. “Too much exposure suppresses the ability