Serve more fruits and vegetables. Carrots, green beans, oranges, strawberries: They all contain such immunity-boosting phytonutrients as vitamin C and carotenoids, says William Sears, M.D., author of The Family Nutrition Book (Little Brown, 1999). Phytonutrients may increase the body’s production of infection-fighting white blood cells and interferon, an antibody that coats cell surfaces, blocking out viruses. Studies show that a diet rich in phytonutrients can also protect against such chronic diseases as cancer and heart disease in adulthood. Try to get your child to eat five servings of fruits and veggies a day. (A serving is about two tablespoons for toddlers, 1? cup for older kids.)
Boost sleep time. Studies of adults show that sleep deprivation can make you more susceptible to illness by reducing natural killer cells, immune-system weapons that attack microbes and cancer cells. The same holds true for children, says Kathi Kemper, M.D., director of the Center for Holistic Pediatric Education and Research at Children’s Hospital, in Boston. Children in day care are particularly at risk for sleep deprivation because all the activity can make it difficult for them to nap. How much sleep do kids need? A newborn may need up to 18 hours of cribtime a day, toddlers require 12 to 13 hours, and preschoolers need about 10 hours. “If your child can’t or won’t take naps during the day, try to put her to bed earlier,” says Dr. Kemper.
Breast-feed your baby. Breast milk contains turbo-charged immunity-enhancing antibodies and white blood cells. Nursing guards against ear infections, allergies, diarrhea, pneumonia, meningitis, urinary-tract infections, and sudden infant death syndrome. Studies show that it may also enhance your baby’s brain power and help protect her against insulin-dependent diabetes, Crohn’s disease, colitis, and certain forms of cancer later in life. Colostrum, the thin yellow “premilk” that flows from the breasts during the first few days after birth, is especially rich in disease-fighting antibodies, says Dr. Shubin. The American Academy of Pediatrics recommends that moms breast-feed for a year. If this commitment isn’t realistic, aim to breast-feed for at least the first two to three months in order to supplement the immunity your baby received in utero.