As Men age, They Lose The Y Chromosome - And It Matters More Than Thought

Men tend to lose the Y chromosome from their cells as they age. But because the Y bears few genes other than for male determination, it was thought this loss would not affect health.

Feb 13, 2026 - 11:00
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Men tend to lose the Y chromosome from their cells as they age. But because the Y bears few genes other than for male determination, it was thought this loss would not affect health.

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