In 2023, Boston University Medical Campus reported that while men make up 15% of centenarians, an impressive 85% are women. Among supercentenarians, those aged 110 or older, the number of women could surge to around 90%.
Women dominate the ranks of centenarians and supercentenarians, comprising 85% of those aged 100+ and 90% over 110, according to 2023 Boston University research. Scientists attribute this disparity to “antagonistic pleiotropy” – where biological advantages like testosterone in younger men become liabilities with age. “Testosterone promotes strength but increases risks for heart disease and strokes later in life,” explained researchers, highlighting how male biology may accelerate aging.
The longevity gap may also stem from chromosomal differences. Women’s dual X chromosomes offer stronger genetic protection compared to men’s X-Y pairing, with Harvard scientists noting “the Y chromosome’s susceptibility to mutations.” Additionally, women may better withstand age-related illnesses, though the exact mechanisms remain under study. These biological factors create a fundamental survival advantage that grows more pronounced with each decade past 100.