Sunlight is essential to life. It stimulates the production of Vitamin D, a hormone that plays a crucial role in bone health, immune function, and possibly the prevention of several chronic diseases. Sun exposure also influences our circadian rhythm, improves mood through serotonin regulation, and has been linked to better mental health outcomes, including reduced Read more… The truth about sun exposure: What dermatologists want you to know originally appeared in KevinMD.com.