Why Do Women Live Longer? Tokyo Medical and Dental University Study

Published: May 16, 2013

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Women's immune systems age more slowly than men's, suggests research in BioMed Central's open access journal Immunity & Ageing. The slower decline in a woman's immune system may contribute to women living longer than men. Researchers looked at the blood of healthy volunteers in Japan, ranging in age between 20 and 90 years old; in both sexes the total number of white blood cells per person decreased with age. The number of neutrophils decreased for both sexes and lymphocytes decreased in men and increased in women. Younger men generally have higher levels of lymphocytes than similarly aged women, so as aging happens, the number of lymphocytes becomes comparable.

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