Aging is weird. You move along, enjoying middle age, and one day, when you look in the mirror, you finally feel like a real adult. “Where did those go? wrinkle From? “Is that the skin on my arm?”crepe? ! ? “Why do I pain Is that it?
In your 40s, you start to notice visible signs of aging It seemed to come overnight. You think it’s a gradual process that you just don’t notice, but it does feel like it’s happening very quickly.
The science behind ‘overnight’ changes
New research suggests this may well be the case. A 2024 study by Stanford researchers tracked thousands of different molecules in people aged 25 to 75 and found that people tend to make two big leaps as they age — one around age 44 and another around age 60. These findings suggest that aging may actually occur suddenly.
“We’re not just getting gradual changes over time. There are some really dramatic changes,” said senior study author Dr. Michael Snyder, a geneticist and director of the Center for Genomics and Personalized Medicine at Stanford University. “It turns out that the mid-40s were a time of huge change, as were the early 60s. This was true no matter which class of molecule you looked at.” The researchers hypothesized that the changes in the 40s were due to menopausal or perimenopausal changes in women affecting the overall numbers, but when they separated the results by gender, they found similar changes in men in their 40s.
“This suggests that while menopause or perimenopause may contribute to the changes observed in women in their 40s, there may be other more important factors influencing these changes in both men and women. Identifying and studying these factors should be a priority for future research,” said study author Dr. Xiaotao Shen, a former Stanford University School of Medicine postdoctoral scholar who now teaches at Nanyang Technological University in Singapore.
What’s behind these “outbreaks”?
The study included 108 participants who submitted blood and other samples every few months over several years. Scientists tracked age-related changes in 135,000 different molecules (nearly 250 billion different data points) to understand how aging occurs.
The research may help shed light on why certain diseases and conditions surge in certain age groups. In people in their 40s, scientists found significant changes in molecules related to alcohol, caffeine, lipid metabolism, cardiovascular disease, skin and muscle. For people in their 60s, changes were found related to carbohydrate and caffeine metabolism, immune regulation, kidney function, cardiovascular disease, and skin and muscle.
Lifestyle is a factor
The study authors did note that lifestyle may play a role in some of these changes. For example, alcohol metabolism may be affected by increased drinking in your 40s, which is often a stressful time for many people. However, the researchers added that the phenomenon of aging in their mid-40s and early 60s suggests that people may want to pay more attention to their health at this age and make lifestyle changes to support overall health, such as increasing exercise or limiting alcohol consumption.
The team plans to study the drivers of these aging bursts to find out why they occur at these ages, but whatever the cause, it’s good to know that age-related problems that seem to crop up aren’t just in our imaginations.
It’s understandable that we worry about aging because the physical signs of aging remind us of our own mortality. We also have all kinds of social messages telling us that youth is ideal and beautiful and old age is bad and ugly, so of course we dismiss aging. But none of us can completely avoid aging, so the more positive and healthy our attitudes toward aging are, the better off we will be, no matter when or how much we age.
This story originally appeared two years ago. It has been updated.
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