Seasonal Affective Disorder (SAD), also known as winter depression, can bring about a range of symptoms, from persistent sadness and loss of interest in activities to sleep problems and overeating. Fortunately, diet plays a vital role in managing SAD. Seasonal Affective Disorder (SAD), also known as winter depression, can bring about a range of symptoms, from persistent sadness and loss of interest in activities to sleep problems and overeating. Fortunately, diet plays a vital role in managing SAD. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle