Aging may begin earlier than most people realize, but scientists say that does not mean decline is inevitable. New research suggests subtle cellular changes can start in early adulthood, long before outward signs of aging appear, and that different organs age on different timelines.
Researchers studying protein changes across tissues found that aging accelerates most noticeably between the mid-40s and mid-50s, with organs such as the spleen, adrenal glands and blood vessels showing earlier shifts. Other systems, including muscles and plasma, tend to change later, highlighting that aging is not a single event but a staggered biological process unfolding over decades.
The findings also point to a hopeful message: lifestyle choices appear to influence how these changes progress. Scientists say habits linked to nutrition, physical activity, sleep and metabolic health during midlife may slow aging at the cellular level, potentially extending both lifespan and years lived in good health.
SOURCE:
WFMZ, January 20, 2026