Health
One type of olive oil has a surprising effect on brainpower during aging
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Olive oil has long been shown to benefit heart health, but a new Spanish study from Universitat Rovira i Virgili revealed that extra virgin olive oil may also protect brain health.
The study found that people who consumed virgin olive oil — rather than refined olive oil — had improved cognitive function and greater diversity in the gut biome, which the researchers claim is an “important marker of intestinal and metabolic health.”
“This is the first prospective study in humans to specifically analyze the role of olive oil in the interaction between gut microbiota and cognitive function,” lead study author Jiaqi Ni, researcher at the URV’s Department of Biochemistry and Biotechnology in Spain, said in a press release.
The study used two years of data from more than 600 people between the ages of 55 and 75 who were overweight or obese and had metabolic syndrome, factors that increase the risk of heart disease.
The study suggests that olive oil protects the brain by acting on the gut microbiota. Virgin olive oil increases the diversity of beneficial bacteria, which serves as a protective shield for cognitive health. (iStock)
The researchers tracked the participants’ consumption of both refined and virgin olive oil, as well as their gut microbiota (the entire collection of living microorganisms in the human gut).
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The findings suggest that the uptick in diverse gut bacteria is the reason that people consuming virgin olive oil have improved brain health, according to the researchers. Those who consumed refined olive oil had less diversity in their gut over time.
“Not all olive oils have benefits for cognitive function.”
The main difference between refined and virgin olive oils is how they are processed, the researchers said.
Refined olive oil undergoes industrial treatments to remove impurities. These treatments degrade the oil, stripping it of the natural antioxidants and vitamins that are beneficial to human health.
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The team also did a follow-up to identify any changes in participants’ cognitive function. Those who consumed extra virgin olive oil showed improved memory, attention and executive function over two years.
Researchers identified that a specific genus of bacteria, Adlercreutzia, is a potential indicator of brain preservation. Higher levels of this bacterium were found in those who used virgin olive oil. (iStock)
Refined olive oil did not show the same cognitive benefits.
“Not all olive oils have benefits for cognitive function,” Ni noted.
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This research reinforces the idea that the quality of fat people consume is as important as the quantity, according to Jordi Salas-Salvadó, principal investigator of the study.
“Extra virgin olive oil not only protects the heart but can also help preserve the brain during aging,” he said in the press release.
The industrial refining process for refined oil strips away the polyphenols and antioxidants that are essential for the “brain-boosting” effect, researchers explain. (iStock)
Because this was an observational study focused on older Mediterranean adults with specific health risks, the findings may not apply to the public, and the study does not prove that olive oil alone caused the cognitive changes.
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The researchers noted that factors like smoking and lower education levels were more common among those using refined oil, which could skew results despite their best efforts to adjust the data.
Additionally, the study relied on self-reported diets, which could have some risk of inaccuracies.
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The study was published in the journal Microbiome.
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A new report by the American Heart Association (AHA) included some troubling predictions for the future of women’s health.
The forecast, published in the journal Circulation on Wednesday, projected increases in various comorbidities in American females by 2050.
More than 59% of women were predicted to have high blood pressure, up from less than 49% currently.
The review also projected that more than 25% of women will have diabetes, compared to about 15% today, and more than 61% will have obesity, compared to 44% currently.
As a result of these risk factors, the prevalence of cardiovascular disease and stroke is expected to rise to 14.4% from 10.7%.
The prevalence of cardiovascular disease and stroke in women is expected to rise to 14.4% from 10.7% by 2050. (iStock)
Not all trends were negative, as unhealthy cholesterol prevalence is expected to drop to about 22% from more than 42% today, the report stated.
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Dr. Elizabeth Klodas, a cardiologist and founder of Step One Foods in Minnesota, commented on these “jarring findings.”
“The fact that on our current trajectory, cardiometabolic disease is projected to explode in women within one generation should be a huge wake-up call,” she told Fox News Digital.
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“Hypertension, diabetes, obesity — these are all major risk factors for heart disease, and we are already seeing what those risks are driving. Heart disease is the No. 1 killer of women, eclipsing all other causes of death, including breast cancer.”
Cardiovascular disease is the leading cause of death for women in the U.S. and around the world. (iStock)
Klodas warned that heart disease starts early, progresses “stealthily,” and can present “out of the blue in devastating ways.”
The AHA published another study on Thursday revealing one million hospitalizations, showing that heart attack deaths are climbing among adults below the age of 55.
The more alarming finding, according to Klodas, is that young women were found more likely to die after their first heart attack than men of the same age.
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“This is all especially tragic since heart disease is almost entirely preventable,” she said. “The earlier you start, the better.”
Children can show early evidence of plaque deposition in their arteries, which can be reversed through lifestyle changes if “undertaken early enough and aggressively enough,” according to the expert.
Moving more is one part of protecting a healthy heart, according to experts. (iStock)
Klodas suggested that rising heart conditions are associated with traditional risk factors, like smoking, high blood pressure, high cholesterol, diabetes, obesity and a sedentary lifestyle.
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Doctors are also seeing higher rates of preeclampsia, or high blood pressure during pregnancy, as well as gestational diabetes. Klodas noted that these are sex-specific risk factors that don’t typically contribute to complications until after menopause.
The best way to protect a healthy heart is to “do the basics,” Klodas recommended, including the following lifestyle habits.
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Klodas especially emphasized making improvements to diet, as the food people eat affects “every single risk factor that the AHA’s report highlights.”
“High blood pressure, high blood sugar, high cholesterol, excess weight – these are all conditions that are driven in part or in whole by food,” she said. “We eat multiple times every single day, which means what we eat has profound cumulative effects over time.”
“Even a small improvement in dietary intake, when maintained, can have a massive positive impact on health,” a doctor said. (iStock)
“Even a small improvement in dietary intake, when maintained, can have a massive positive impact on health.”
The doctor also recommends changing out a few snacks per day for healthier choices, which has been proven to “yield medication-level cholesterol reductions” in a month.
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“Keep up that small change and, over the course of a year, you could also lose 20 pounds and reduce your sodium intake enough to avoid blood pressure-lowering medications,” Klodas added.
“Women should not view the AHA report as inevitable. We have power over our health destinies. We just need to use it.”
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Nearsightedness (myopia) is skyrocketing globally, with nearly half of the world’s population expected to be myopic by 2050, according to the World Health Organization.
Heavy use of smartphones and other devices is associated with an 80% higher risk of myopia when combined with excessive computer use, but a new study suggests that dim indoor lighting could also be a factor.
For years, scientists have been puzzled by the different ways myopia is triggered. In lab settings, it can be induced by blurring vision or using different lenses. Conversely, it can be slowed by something as simple as spending time outdoors, research suggests.
Nearsightedness occurs when the eyeball grows too long from front to back, according to the American Optometric Association (AOA). This physical elongation causes light to focus in front of the retina rather than directly on it, making distant objects appear blurry.
The study suggests that myopia isn’t caused by the digital devices themselves, but by the low-light environments where they are typically used. (iStock)
Researchers at the State University of New York (SUNY) College of Optometry identified a potential specific trigger for this growth. When someone looks at a phone or a book up close, the pupil naturally constricts.
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“In bright outdoor light, the pupil constricts to protect the eye while still allowing ample light to reach the retina,” Urusha Maharjan, a SUNY Optometry doctoral student who conducted the study, said in a press release.
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“When people focus on close objects indoors, such as phones, tablets or books, the pupil can also constrict — not because of brightness, but to sharpen the image,” she went on. “In dim lighting, this combination may significantly reduce retinal illumination.”
High-intensity natural light prevents myopia because it provides enough retinal stimulation to override the “stop growing” signal, even when pupils are constricted. (iStock)
The hypothesis suggests that when the retina is deprived of light during extended close-up work, it sends a signal for the eye to grow.
In a dim environment, the narrowed pupil allows so little light through that the retinal activity isn’t strong enough to signal the eye to stop growing, the researchers found.
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In contrast, being outdoors provides light levels much brighter than indoors. This ensures that even when the pupil narrows to focus on a nearby object, the retina still receives a strong signal, maintaining healthy eye development.
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The team noted some limitations of the study, including the small subject group and the inability to directly measure internal lens changes, as the bright backgrounds used to mimic the outdoors made pupils too small for standard equipment.
Researchers believe that increasing indoor brightness during close-up work could be a simple, testable way to slow the global nearsightedness epidemic. (iStock)
“This is not a final answer,” Jose-Manuel Alonso, MD, PhD, SUNY distinguished professor and senior author of the study, said in the release.
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“But the study offers a testable hypothesis that reframes how visual habits, lighting and eye focusing interact.”
The study was published in the journal Cell Reports.
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