Aside from plenty of water and good night's rest, there are vitamins that can boost your immune system: Vitamin C in citrus fruit and broccoli, Vitamin E in nuts and whole grains, Zinc in beans and turkey, and omega-3 fatty acids found in nuts, tuna, and flaxseed or hempseed oil.
Fortunately, autumn's harvest of choice is pumpkin, as they are wonderful for boosting immunity to fend off the return of the common cold. Support your immune system with probiotic-rich foods like yogurt, and by keeping hydrated throughout your day.
Traveling to a location that your system is unfamiliar with? Vitamin A can assist in the battling and prevention of disease. Examples of Vitamin A-rich foods: dairy products, green or yellow vegetables, and mangoes; but be sure to grab a supplement to take with you.
Take advantage of the harvest of the season. Ripe, fresh vegetables and fruits boast more vitamins, minerals and antioxidants. Apples, corn, pumpkin, and other squash and roots are autumn harvests.
If you feel yourself beginning to come down with a cold this winter, be sure to boost your immune system with Vitamin C and Zinc. Also increase your water intake to help your body's natural defences.
As the days grow shorter, don't miss out on Vitamin D. It helps in building strong bones, and can help regulate your immune system and mood.