Winter is a time when you need to build your immunity; cold temperatures bring in seasonal ailments, so one must enhance immunity. Including nutrient-rich diets will help keep you active and healthy. Winter is a time when you need to build your immunity; cold temperatures bring in seasonal ailments, so one must enhance immunity. Including nutrient-rich diets will help keep you active and healthy. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle