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Nutrient intake and immune function of elderly subjects. Wardwell L, Chapman-Novakofski K, Herrel S, Woods J. J Am Diet Assoc. 2008 Dec;108(12):2005-12. PMID: 19027403 doi:10.1016/j.jada.2008.09.003

Age, stress, and poor nutrition can sap our immune system of its effectiveness. Influenza provides one example. During young adulthood, when the body can mount a robust immune response to this common virus, influenza is rarely fatal. Among the elderly, however, the virus is associated with significant rates of death and hospitalization (Nichol KL 2005). The impact of aging on the immune system is profound. As people age, a number of critical immune system components are reduced or slowed, including cellular response, response to vaccines, and antibody production. At the same time, susceptibilities to infection and cancer are increased. Some of this increased susceptibility to disease is linked to chronic inflammation, which is associated with many disorders of aging (Ershler WB et al 2000; Hamerman D 1999; Taaffe DR et al 2000).

A U.S. government requirement that vitamin C or one of its close relatives be added to hot dogs, to reduce the amount of nitrites found in this popular food, may not have lowered the rate of colon cancer cases after all, a new study suggests.