The human body was built to work in partnership with the sun. Its light can transform our moods, focus, sleep, energy levels, immune systems, bone density, and mental health. As a result, spending time in the sun can be particularly beneficial to people living with Parkinson's who experience symptoms like depression, apathy, poor sleep, pain, and fatigue. And all you need to do to reap these benefits is step into the light. Here, we'll look at the many ways sunlight can help you live well with Parkinson's.