Sunlight is the main source of vitamin D, but depending on where you live, it may be tough to catch some rays during the winter months.
Luckily, you can get more of this important nutrient right in your own kitchen.
Many foods are naturally rich in vitamin D.
The Cleveland Clinic lists salmon, tuna, swordfish, sardines, beef liver, egg yolks, fortified milk alternatives, Swiss cheese and fortified yogurt as among the top sources.