Boost your immune system for winter with food

(CNN)You are what you eat, experts say, and that includes foods that will help your body fight off infectious diseases this winter. (Think colds, flu and Covid-19.)

"What we eat is very important in terms of how our immune system responds to pathogens and how well it can defend itself against a pathogen," said Dr. Simin Meydani, senior scientist and leader of the nutritional immunology team at Tufts University's Jean Mayer USDA Human Nutrition Research Center on Aging.
Micronutrients such as vitamin C, vitamin D, vitamin B complex, zinc and selenium help "pump up" two basic parts of the body's defenses. The innate immune system springs into action as the first line of defense, followed by the adaptive immune system, which sends killer T cells, antibodies and other soldiers into combat.
    Just how much you can jump-start immunity with nutrients depends on your age, overall health and stress levels, experts say.
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