In the winter, we tend to reduce our physical activity, spend more time indoors, and consume higher calorie and sugar holiday comfort foods. This can set us up for poor nutrition/lifestyle choices. Also, when body temperature decreases it increases your appetite, as eating generates heat and helps warm your body. This can lead to over-eating and weight gain. Eating healthy in the winter is important for staying warm, keeping your immune system up, and to maintain a healthy weight.