The mitochondrial theory of aging: Why your cells lose power and how to fix it
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Jan 13, 2026 · 12 min read
Between ages 30 and 70, mitochondrial function in skeletal muscle can drop by 25 to 30%, lowering ATP production and slowing repair, fat metabolism, and hormone output. Many researchers consider these changes a core driver of aging. The good news is that mitochondria can respond to the right signals, and this guide shows how to ...