Defeat the Winter Blues: Managing Seasonal Affective Disorder (SAD) by Boosting Vitamin D Levels Have you ever heard that sunshine makes you happier? It’s actually true, and there is a scientific explanation for why. Our bodies need a lot of different vitamins to maintain health, and vitamin D is one of the essentials naturally found in sunlight. Hike or bike the Eureka Trail this winter or visit the gardens at Sunshine Hollow for a ...