Over a quarter century, the eating habits of more than twenty-five thousand American women offered a quiet answer to an old human question: whether the way we nourish ourselves shapes how long we live. Those who most closely followed a Mediterranean pattern, rich in plants, olive oil and whole grains and light on red meat and processed food, died of any cause at a rate more than a fifth lower than those who did not. Researchers at Brigham and Women's Hospital suggest the protection may work through shifts in metabolism, inflammation and blood pressure, though the evidence is observational and
Mediterranean Diet Linked to 23% Lower Mortality Risk in Women Over 25-Year Study
More than a fifth less likely to die of any cause
Mark
So what's the headline number here?
Mimi
Women who regularly ate in a Mediterranean pattern were 23 percent less likely to die of any cause over the study, which followed 25,315 women for 25 years.
Mark
And it wasn't just one cause of death?
Mimi
Mora said the benefit showed up for both cancer and cardiovascular mortality, the leading causes of death in the US and globally.
Luke
Before we get carried away: this is an association. The method wasn't designed to show cause and effect.
Mimi
Right, and the researchers say so. But they also found shifts in metabolic and inflammatory markers, blood pressure and insulin resistance that fit a plausible explanation.
Mark
Does the biomarker work make it stronger?
Luke
It gives a possible mechanism, which helps. But the source says it appears these factors add up, not that it's proven. And the diet data outside the biomarkers was self-reported.
Mark
Who was in the study?
Mimi
Mainly white, non-Hispanic, middle-aged and older women, all well-educated health professionals.
Luke
So we don't know from this study whether the 23 percent holds for other groups. That's still unknown.
Mark
Why trust it at all, then?
Mimi
Size, length, and other studies pointing the same way. That's the case the reporting makes.
O Pulso
- A 25-year record of more than 25,000 women has surfaced a striking claim: a Mediterranean-style diet is tied to a 23 percent drop in death from any cause.
- The finding lands in a public health landscape where cancer and heart disease remain the leading killers, raising pressure to translate diet into prevention.
- Researchers are tracing the protection through biomarkers, following shifts in inflammation, metabolic function, blood pressure and insulin resistance to see how the body responds.
- Yet the data rests on self-reported eating and a cohort of mostly white, educated professionals, leaving open whether the effect holds for everyone else.
Over a quarter century, the eating habits of more than twenty-five thousand American women offered a quiet answer to an old human question: whether the way we nourish ourselves shapes how long we live. Those who most closely followed a Mediterranean pattern, rich in plants, olive oil and whole grains and light on red meat and processed food, died of any cause at a rate more than a fifth lower than those who did not. Researchers at Brigham and Women's Hospital suggest the protection may work through shifts in metabolism, inflammation and blood pressure, though the evidence is observational and drawn largely from well-educated health professionals.
For twenty-five years, researchers followed the lives of 25,315 American women, keeping track of what they ate and, eventually, who died. When the records were examined, a clear pattern emerged. Women whose meals most closely resembled a Mediterranean diet were more than a fifth less likely to die from any cause than those who ate differently. The team at Brigham and Women's Hospital, part of Harvard Medical School, published the work in JAMA Network Open.
The diet at the center of the study draws its name from the region that inspired it and is built on nuts, seeds, fruits, vegetables, whole grains and legumes, with olive oil as the primary fat. Fish, poultry, dairy and eggs appear in modest amounts, while red meat, processed foods and alcohol are kept low. The researchers looked beyond the outcome itself, probing the body for clues about why this pattern might matter. The strongest differences appeared in metabolic and inflammatory processes, along with better blood pressure and insulin resistance.
Cardiologist Samia Mora urged women who want longer lives to pay attention to their plates, noting that the benefit extended to both cancer and cardiovascular deaths, the leading causes in the US and worldwide. Epidemiologist Shafqat Ahmad added that even modest improvements in known metabolic risk factors can accumulate into meaningful protection over decades.
The authors are careful about what their work can claim. The participants were largely white, non-Hispanic, and well educated, and most information came from self-reports, so cause and effect cannot be proven. Still, the size of the sample, the length of follow-up and consistent findings elsewhere point in a hopeful direction. Mora argued that policy should champion the diet's healthful core while discouraging distorted versions of it. The next step is to learn whether the same benefits reach more diverse communities.
Records for 25,315 women, followed across a quarter century, now point to a plain finding: those whose eating most closely matched a Mediterranean pattern were more than a fifth less likely to die of any cause during the study period than women who did not eat that way. The figure researchers highlight is a 23 percent reduction in mortality.
The work comes from a team at Brigham and Women's Hospital, which is part of Harvard Medical School, and was published in JAMA Network Open. The diet at its center is named for the region that inspired it and has long been linked to better health. This study adds weight to that association by swapping processed foods for fresh fruit and vegetables, and by looking at what may be happening inside the body.
The pattern itself is built mostly on nuts, seeds, fruits, vegetables, whole grains and legumes, with olive oil as the main fat. Protein comes in smaller amounts from fish, poultry, dairy and eggs. Red meat, processed foods and alcohol are kept to a minimum.
Cardiologist Samia Mora of Brigham and Women's said the message for women who want to live longer is to watch their diet. She described the result as roughly a one-quarter reduction in risk of death over more than 25 years, with benefit for both cancer and cardiovascular mortality, which she noted are the top causes of death in women and men in the US and worldwide.
The team also examined numerous biomarkers to see why the diet might matter. The main differences appeared in metabolic and inflammatory processes, the systems that help keep the body's functions running normally. Women on a Mediterranean diet also showed improvements in blood pressure and insulin resistance compared with those who ate in other ways. The picture that emerges is of several factors adding up to protection against early death.
Epidemiologist Shafqat Ahmad, of Brigham and Women's and Uppsala University in Sweden, said even modest changes in established risk factors for metabolic disease can yield substantial long-term benefits. He pointed to factors tied to small molecule metabolites, inflammation, triglyceride-rich lipoproteins, obesity and insulin resistance.
There are limits. The participants were mainly white, non-Hispanic, middle-aged and older women, all of them well-educated health professionals. Apart from the biomarker analysis, the data came from self-reporting, and the method was not designed to establish cause and effect.
Still, the large sample, the long follow-up and similar conclusions from other studies in this area suggest the diet may really help people live longer. Mora said medical professionals already recognize its benefits and that the study offers insight into why. She argued that public health policy should promote the healthful attributes of the diet and discourage unhealthy adaptations of it. What remains to be tested is whether the same results hold in more diverse populations.
Citações Notáveis
For women who want to live longer, our study says watch your diet.— Samia Mora, cardiologist, Brigham and Women's Hospital
Even modest changes in established risk factors for metabolic diseases can yield substantial long-term benefits from following a Mediterranean diet.— Shafqat Ahmad, epidemiologist, Brigham and Women's Hospital and Uppsala University
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