Why do we need sunlight ? how are you .. rs ..
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Exposure to sunlight is thought to increase the brain's release of a hormone called serotonin. Serotonin is associated with boosting mood and helping a person feel calm and focused. ... This hormone is responsible for helping you sleep. Without enough sun exposure, your serotonin levels can dip.
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The sun's UV rays help your body make this nutrient, which is important for your bones, blood cells, and immune system. It also helps you take in and use certain minerals, like calcium and phosphorus.
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