Does a day in the sun tend to perk you up? Vitamin D can do that for you! Exposure to sunlight interacts with cholesterol in your skin cells creating the energy for vitamin D synthesis to occur. 8-15 minutes of sun per day can be sufficient for making adequate Vitamin D. Make sure to protect yourself from overexposure to sunlight. Vitamin D not only facilitates immune function but it also plays a role in mood regulation. Unable to soak up the sun’s ray, there are a few Vitamin D rich foods. Try to include tuna, mackerel, oysters, shrimp sardines, and anchovies, mushrooms, egg yolks, and foods fortified with Vitamin D. Supplements of 1,000-4,000 IU is considered a safe daily dose but you should consult a physician prior to adding supplements to your daily regimen.