The winter season is often referred to as a time of joy. We spend much of it enjoying the holidays, spending time with family, and basking in the warmth of cozy traditions. However, for many of us, winter brings with it the symptoms of Seasonal Affective Disorder (SAD), also known as seasonal depression. Many different factors can contribute to SAD, including low levels of vitamin D, and it can manifest itself in a number of ways, such as low mood, increased anxiety and irritability, persistent fatigue, and disrupted sleep. Those of us who deal with SAD know that it can make these cold months feel long and bleak, but the good news is that you have the power to do more than simply wait for spring. Take charge of your mental health this winter with the supplements, herbs, mushrooms, and formulas outlined below.