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A study of 726 midlife women published in Psychoneuroendocrinology found that anxiety about aging was associated with faster epigenetic aging. Harvard geneticist David Sinclair says roughly half of aging rate depends on lifestyle, pointing to UV exposure, chronic stress, poor sleep, smoking, loneliness, and gut imbalance as accelerators.
Anxiety about growing older may itself accelerate the body’s aging at a cellular level, according to a study of 726 midlife women published in the February 2026 issue of Psychoneuroendocrinology. The finding, highlighted in a Harvard Health-authored report distributed by Seniors Guide, adds aging worry to a list of better-known accelerators — sun exposure, chronic stress, smoking, and poor sleep — at a time when researchers say roughly half of a person’s aging rate is shaped by lifestyle choices.
The study found that women who reported feeling more anxious about getting older — particularly fears about declining health — tended to show faster epigenetic aging, meaning their bodies appeared older at a cellular level based on how genes were switched on and off. The researchers suggest this anxiety may produce changes in how genes function, though the study was observational and involved a specific group: midlife women.
The report distinguishes between chronological age, which simply counts years since birth, and biological age, which describes how well the body is functioning and is estimated using measures such as physical fitness, blood pressure, and cholesterol levels. David Sinclair, a professor of genetics and co-director of the Paul F. Glenn Center for the Biology of Aging Research at Harvard Medical School, says genes account for up to 50% of how quickly or slowly a person ages — leaving the other half influenced by behavior and environment.
The well-established accelerators listed in the report include UV light exposure, which damages DNA; chronic stress, which raises cortisol and fuels inflammation; poor sleep, which reduces repair time for brain and body; smoking; a sedentary lifestyle, which drives muscle loss; and obesity. Less obvious contributors named include more-than-occasional alcohol use, excess radiation exposure, air and industrial pollution, and shift work that disrupts biological rhythms.
Why Lifestyle-Driven Aging Matters
The central message of the research, according to Sinclair, is that biological aging is malleable — meaning habits can move it in either direction. “There’s a big difference between your birthdays and your biological age — and only the latter can be changed,” Sinclair said. “The good news is that at least half our future health is in our own hands.”
That framing matters for readers because the modifiable factors are common and everyday: sunlight, stress, sleep, diet, activity, and social contact. Sinclair said that people who adopt healthy behaviors — regular exercise, consistent high-quality sleep, a plant-forward diet, strong social connections, and a sense of purpose — can show “sometimes a decade of difference in their biological aging” compared with those who do not, though he characterized this as based on comparisons across research rather than a guaranteed outcome for any individual.
Sinclair’s Information Theory of Aging
Sinclair’s research has aimed to identify a universal driver of aging, which he calls the Information Theory of Aging. In his framing, aging depends on how effectively the body reads its genes. “We are not machines – we are computers, and aging is due to the corruption of software,” he said.
He describes two pathways to faster aging. The first is what he calls “abundance mode” — conditions such as too much sitting or too much food that signal to the body that times are good. The second is direct cellular damage, such as sunburn, which he says may accelerate biological aging “because cells cannot cope.” The report was written by Maureen Salamon, executive editor of Harvard Women’s Health Watch, and distributed by Tribune Content Agency.
“There’s a big difference between your birthdays and your biological age — and only the latter can be changed. The good news is that at least half our future health is in our own hands.”
— David Sinclair, Harvard Medical School professor of genetics
What the Evidence Does Not Yet Show
Several claims in the report come with explicit caveats. The link between yo-yo dieting and accelerated epigenetic aging has no direct evidence, Sinclair said — it rests on the theoretical idea that rapid changes to cells could speed epigenetic change. The anxiety study involved only midlife women, so it is unclear whether the findings extend to men or to other age groups, and the report does not establish that anxiety causes faster aging, only an association.
Connections cited for bright light and loud music exposure, loneliness, and gut microbiome imbalance are described as research suggestions rather than settled conclusions. The loneliness-smoking comparison, for instance, is presented as a general finding from research, without a specific study or effect size named. Readers should treat individual claims as attributed to researchers rather than as established medical guidance, and consult a qualified health professional before making changes.
Research Directions on Aging
The report points to continued research into epigenetic aging measures and the mechanisms behind them, including Sinclair’s work on a universal driver of aging. The February 2026 study opens questions about whether reducing aging-related anxiety — through stress management, counseling, or reframing — could measurably slow epigenetic aging, a question the report does not address. Sinclair advises that lifestyle changes are worthwhile at any point: “It’s never too late to start, though it’s better to start early.”
Key Questions
What is the difference between chronological and biological age?
Chronological age is the number of years since birth. Biological age describes how well the body is functioning and is estimated using measures such as physical fitness, blood pressure, and cholesterol levels, as well as epigenetic markers.
Can worrying about aging actually make you age faster?
A study of 726 midlife women found that those more anxious about aging tended to show faster epigenetic aging. The finding is an association in one group of women; it does not prove anxiety causes accelerated aging in everyone.
How much of aging is controlled by genes?
According to Harvard geneticist David Sinclair, genes account for up to 50% of how quickly or slowly a person ages, leaving roughly half influenced by lifestyle and environment.
Which factors are confirmed to speed up aging?
Well-established accelerators cited in the report include UV exposure, chronic stress, poor sleep, smoking, a sedentary lifestyle, and obesity. Less firmly established contributors include alcohol, air pollution, shift work, yo-yo dieting, and loneliness.
What lifestyle habits may slow biological aging?
Sinclair points to regular exercise, consistent high-quality sleep, a plant-forward diet, strong social connections, and a positive outlook or sense of purpose. He describes differences of up to a decade in biological aging between people who practice these habits and those who do not, though individual results vary.
Source: rss
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