29. Aging and Slowing Cell Renewal
As we age, cellular turnover rates naturally decline. This slowdown means tissues like skin, muscle, and bone regenerate more slowly, leading to visible signs of aging—thinner skin, slower wound healing, and graying hair. Reduced renewal also contributes to degenerative diseases, as old or damaged cells accumulate and tissue function declines. Understanding these changes is key to developing anti-aging therapies. For more on aging and cell turnover, visit National Institute on Aging.