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What are the two key ages your body has a mid life crisis?

According to a 2024 study published in the journal *Nature Aging*, the human body undergoes dramatic 'aging bursts' around the average ages of 44 and 60, indicating two key ages your body has a mid life crisis, or more accurately, a period of significant biological transition. These periods are characterized by massive, nonlinear shifts in molecular and microbial activity that can correlate with emotional and physical upheaval.