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One type of olive oil has a surprising effect on brainpower during aging

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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.

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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.”

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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)

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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.

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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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No sex for 10 weeks? Championship team’s playoff strategy raises eyebrows

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No sex for 10 weeks? Championship team’s playoff strategy raises eyebrows

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No sex for the win? This was the advice given to this year’s NBA champions.

New York Knicks owner James Dolan addressed the now-champs as they headed into the playoffs in April 2026, acknowledging their high potential to eventually win the championship.

“I don’t know if you understand what it would mean for you to win a championship this year … It would be life-changing,” he said. “It will stick with you the rest of your lives, and if you don’t win, you’ll be thinking about it the rest of your lives.”

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As Dolan’s inspirational speech to the team went on, he explained how the next 10 weeks would require each player to make sacrifices – watching their diets, getting proper sleep and perhaps even abstaining from sex.

“You need sacrifice and you need to eliminate all the distractions around you,” he said.

Jalen Brunson of the New York Knicks celebrates with the Bill Russell NBA Finals Most Valuable Player Award trophy and Knicks owner James Dolan after defeating the San Antonio Spurs in Game Five of the 2026 NBA Finals at Frost Bank Center in San Antonio, Texas, on June 13, 2026. (Gregory Shamus/Getty Images)

“I had this idea that maybe you should give up sex for the next 10 weeks,” the owner said. “You don’t have to give up sex for the next 10 weeks – but, like the Spartans … They denied themselves, so that they can have an edge. Get the edge.”

This received a few snickers from the team, and Dolan responded, “Don’t tell [your wives and girlfriends] you’re not going to have sex and don’t tell them it was my idea. But let them know what this is going to be like … and how they’re going to have to sacrifice, too.”

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Dr. Anna Elton, licensed marriage and family therapist and clinical sexologist in Massachusetts, confirmed that this belief has been around for centuries, dating back to the ancients Spartans and early Olympic competitors.

Avoiding sex can preserve energy, increase aggression and sharpen focus, according to Elton.

The theory behind abstaining from sex for better athletic performance supports that it can preserve energy, increase aggression and sharpen focus. (iStock)

But modern research has found little evidence that consensual sexual activity negatively impacts strength, endurance, reaction time or athletic performance when it occurs at least 10 hours before competition, the doctor countered.

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However, “activity very close to competition may affect recovery measures,” she added. What may be more important, according to Elton, is the psychological value of abstinence.

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“Choosing to abstain can reinforce discipline and total commitment to a larger goal,” she said. “In those cases, the advantage may come more from mindset and focus than from any physical effect.”

“Whether the sacrifice is alcohol, social activities, favorite foods or sex, the message is often the same: ‘We are all in.’”

New York Knicks guard Jalen Brunson celebrates with teammates after the Knicks defeated the San Antonio Spurs in game five of the 2026 NBA Finals at Frost Bank Center in San Antonio, Texas, on June 13, 2026. (Geoff Burke/Imagn Images)

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The science of abstinence

This discussion has historically focused on men, which Elton said is often based on “misconceptions about testosterone and energy depletion.”

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“Research has not demonstrated that normal sexual activity causes a meaningful decline in athletic performance, and concerns about testosterone depletion have not been consistently supported by the evidence,” she said.

“For women, sexual activity may have additional benefits related to stress reduction, emotional regulation and relationship satisfaction.”

Abstaining from sex for athletic performance may create a sense of discipline, minimize distractions, maintain focus on training and reinforce a team culture centered on sacrifice and commitment, experts say. (iStock)

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In a separate interview with Fox News Digital, Dr. Anthony Puopolo, a men’s health expert and lead medical provider for RexMD, echoed Elton’s assessment that research largely does not support abstinence as a performance enhancer.

This is despite a small amount of evidence that suggests engaging in sexual activity within two hours of competition could pose a risk to cardiovascular recovery.

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“Unfortunately, nearly all studies (99%) have been conducted in males aged 20 to 40, so there is virtually no data on female athletes, older athletes or diverse populations,” said the Puerto Rico-based expert. “We know what to tell the Knicks, but we are not sure what to recommend for the New York Liberty.”

Importance of connection

Elton said abstinence may still offer psychological benefits for some competitors. “For some athletes, it can become part of a pre-competition ritual that enhances confidence,” she told Fox News Digital.

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Some other potential benefits of sexual activity include stress reduction, improved sleep, mood enhancement, emotional connection with a partner and relief from performance-related tension.

“Strong, supportive relationships are associated with better psychological resilience, which can be valuable during high-pressure competitions,” Elton said.

“One of the most overlooked performance advantages may be having a supportive relationship waiting at home,” a doctor said. (iStock)

“Ultimately, there is no universal rule,” she went on. “What helps one athlete perform at their best may not help another.”

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Elton stressed that sleep, recovery, nutrition, stress management and support from loved ones are universal performance boosters.

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“Athletes devote tremendous attention to training their bodies, while overlooking the importance of their personal relationships,” she cautioned. “A supportive partner can be one of the greatest assets during a demanding season.”

“If competition requires temporary sacrifices, make those decisions together and keep communication open.”

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Zero sugar, more problems? Study reveals surprising gut health effects

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Zero sugar, more problems? Study reveals surprising gut health effects

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Eliminating sugar from your diet may seem like the key to healthy eating, but research suggests it could have unintended effects on digestive health.

A study presented at ENDO 2026, the Endocrine Society’s annual meeting, suggests that a total lack of sucrose, or table sugar, may harm gut health and disrupt the body’s natural metabolism.

To explore how the total absence of dietary sugar impacts the body, researchers at the Dasman Diabetes Institute in Kuwait City conducted a 16-week study on two groups of mice. Both groups were placed on a low-fat diet, but with one critical difference.

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One group consumed a low-fat diet that included a standard amount of sucrose, while the other group ate a low-fat diet that was completely sugar-free, according to the study’s press release.

Throughout the trial, the scientists monitored a wide variety of physiological factors, including the animals’ weight, glucose tolerance, insulin sensitivity, hormone levels, internal inflammation and the specific composition of their gut bacteria.

A total lack of dietary sugar can cause imbalances in the gut bacteria and lead to signs of fatty liver disease, even without any weight gain, researchers said. (iStock)

The study outcome suggested that completely removing sugar caused several unexpected health problems.

“Completely removing sucrose from a low-fat diet may unexpectedly disrupt gut health and promote inflammation and metabolic dysfunction,” Rasheed Ahmad, principal scientist and head of the Immunology & Microbiology Department at the Dasman Diabetes Institute, said in the release.

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Even though the mice on the sugar-free diet did not gain any extra weight compared to the control group, their internal health indicators deteriorated.

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The animals that lacked sucrose developed an imbalance in their gut microbes and increased inflammation within the intestines and liver.

They also showed signs of poor glucose regulation, insulin resistance and cellular changes associated with fatty liver disease, according to the research.

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Future dietary guidelines may shift away from strict, absolute sugar bans and instead focus on overall gut health through balanced nutrition. (iStock)

“The findings suggest that complete removal of sucrose from a low-fat diet may negatively affect gut microbiota and metabolic health,” Ahmad concluded.

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While the risks of high-sugar diets are well-established, the researchers noted that little attention has been given to the effects of completely eliminating sugar from low-fat meals.

Scientists say these new findings highlight that dietary carbohydrates play a valuable role in supporting balance between the immune system and the gut microbiome.

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Completely cutting sucrose from a low-fat diet can unexpectedly trigger gut inflammation and disrupt the metabolism, experts say. (iStock)

Because this research was conducted on mice over a relatively short 16-week period, further clinical trials are necessary to determine whether a completely sugar-free diet causes the same gut and liver inflammation in humans.

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Additionally, the study focused specifically on removing sucrose from low-fat meals, meaning the results might not apply to people eliminating sugar while following higher-fat or ketogenic eating plans, the researchers noted.

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The team believes that future dietary guidelines may shift away from strict, absolute sugar restrictions and instead place a greater emphasis on maintaining a diverse, healthy population of gut bacteria through balanced nutrition.

“In the long term, these findings could help improve strategies for preventing and managing metabolic disorders, fatty liver disease and chronic inflammatory conditions,” Ahmad said.

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