When does the human body start to age rapidly?
According to The Guardian, a recent study published in the journal Nature Aging sheds light on this question. Stanford University School of Medicine researchers tracked thousands of biomolecular changes across various age groups.
The study involved 108 volunteers ranging in age from 25 to 75. Over 1 to 7 years, the team collected blood, stool, and swab samples from their skin, mouth, and nose. They monitored the aging process by examining 135,000 molecules—including RNA, proteins, and metabolic products—and microorganisms like bacteria, viruses, and fungi on the volunteers’ skin and in their intestines. Significant changes were observed in molecules and microorganisms during the mid-40s and early 60s.
The research identified that the most notable changes in the mid-40s were linked to molecules associated with cardiovascular diseases and the metabolism of caffeine, alcohol, and fats. By contrast, changes in the early 60s involved molecules related to immune regulation, carbohydrate metabolism, and kidney function.
Both periods saw changes in molecules related to skin and muscle aging.
According to the study, the human body undergoes rapid aging at two critical stages: around age 44 and again at age 60.
Professor Michael Snyder, a Stanford geneticist and the study’s lead author, explained, “We’re not just changing gradually over time. There are some really dramatic changes.”
“It turns out the mid-40s is a time of dramatic change, as is the early 60s – and that’s true no matter what class of molecules you look at.”
The researchers also noted that some of these molecular shifts might be linked to lifestyle and behavioral factors. For instance, changes in alcohol metabolism could be associated with increased drinking during the stressful mid-40s.
Snyder suggested, “I’m a big believer that we should try to adjust our lifestyles while we’re still healthy.“
