Health
Orangutan in Indonesian rainforest treats own facial wound, say researchers: ‘Appeared intentional’
An orangutan in a protected Indonesian rainforest site who sustained a facial wound treated the injury himself, according to a study published in the journal Scientific Reports earlier this month.
The male primate chewed the leaves of a plant known for its anti-inflammatory, antibacterial and pain-relieving properties — then applied a paste he made from the chewed leaves to his facial wound, according to the study.
The researchers — from the Max Planck Institute of Animal Behavior in Germany and Universitas Nasional in Indonesia — observed the orangutan, named Rakus, over the course of several weeks in the summer of 2022.
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His wound closed within five days, he noted.
Less than a month later, it appeared to be fully healed with a barely visible scar, according to the published report.
An orangutan that sustained a facial wound, shown on the left, treated it himself, according to a study published in the journal Scientific Reports earlier this month. In the image on the right, his scar is just barely noticeable. (Armas Fitra & Safruddin & TNGL & KLHK & MPI & UNAS & YEL)
This is the first observed case of active wound treatment with a “known biologically active plant substance” applied by a male Sumatran orangutan in the wild.
“He began chewing the leaves without swallowing them and using his fingers to apply the plant juice from his mouth directly onto his facial wound,” the researchers noted in their published study.
“This behavior was repeated several times.”
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“Rakus then smeared the entire wound with the plant pulp until the red flesh was fully covered with the green leaf material. He then continued feeding on this plant,” they continued.
The orangutan was observed at the Suaq Balimbing research site in Indonesia.
It is a rainforest area that is home to approximately 150 critically endangered Sumatran orangutans, according to a news release.
“The behavior of the Sumatran flanged male orangutan reported here appeared to be intentional,” the researchers wrote.
“The entire process took a considerable amount of time.”
The study authors said the animal’s facial wound likely occurred during a fight with a neighboring male.
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Isabelle Laumer, a primatologist and cognitive biologist at the Max Planck Institute of Animal Behavior in Germany — one of the lead study authors — said in an email to Fox News Digital that the primate used a climbing plant called Fibraurea tinctoria.
The plant is known for its analgesic effects and is used in traditional medicine to treat conditions such as malaria.`
When asked how Rakus knew to use that plant to treat his own wound, Laumer replied, “It is possible that wound treatment with Fibraurea tinctoria emerges through accidental individual innovation.”
She added, “Individuals may accidentally touch their wounds while feeding on Fibraurea tinctoria and thus unintentionally apply the plant’s juice to their wounds … As Fibraurea tinctoria has potent analgesic effects, Rakus may have felt an immediate pain release, causing him to repeat the behavior several times and subsequently apply solid plant matter.”
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Rakus was not born at the research site, Laumer said.
Male orangutans typically disperse over wide distances when they reach puberty to establish a new home in another area, the expert noted.
“It’s possible that orangutans at his native area showed the behavior,” Laumer said.
Dr. Isabelle Laumer, a primatologist and cognitive biologist at the Max Planck Institute of Animal Behavior in Germany, was one of the lead study authors. (Alice Auersperg)
Similar types of self-treatment have been reported in the past with other primates.
Great apes have reportedly ingested certain plants to treat parasite infections and rubbed plant material on their skin to treat sore muscles, the researchers noted.
“Maybe we can learn something about human medicine from them.”
A group of chimpanzees in Gabon was also observed applying insects to wounds, although “the efficiency of this behavior is still unknown,” according to a news release.
These types of observations could help humans with treating potential health conditions, the researchers said.
The study authors said Rakus’ facial wound likely occurred during an altercation with a neighboring male. (Saidi Agam & TNGL & KLHK & MPI & UNAS & YEL)
“So far, I have heard several reports that people have actually learned about the medicinal properties of plants through observing animals,” Laumer told Fox News Digital.
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Dr. Robin Sturtz, a veterinarian who was not involved in the study, commented on the findings.
“It’s great that they caught these images,” she told Fox News Digital, but noted that the published report is observational.
The primate used a climbing plant called Fibraurea tinctoria, the researchers said, to help a facial wound to heal. (Saidi Agam & TNGL & KLHK & MPI & UNAS & YEL)
“We need to see if it’s repeated in this or another animal,” Sturtz told Fox News Digital.
“They are incredibly smart, though, and do learn quickly,” she added. “Maybe we can learn something about human medicine from them.”
Caroline Schuppli, one of the co-authors of the published study, noted in a news release that forms of active wound treatment are not limited to humans.
“[They] can also be found in both African and Asian great apes,” she stated.
“It is possible that there exists a common underlying mechanism for the recognition and application of substances with medical or functional properties to wounds, and that our last common ancestor already showed similar forms of ointment behavior.”
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For women over 60, muscle strength plays a critical role in longevity, a new study confirms.
Researchers at the University at Buffalo, New York, followed more than 5,000 women between the ages of 63 and 99, finding that those with greater muscle strength had a significantly lower risk of death over an eight-year period.
The findings were published in JAMA Network Open.
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Muscle function was measured using grip strength and how quickly participants could complete five unassisted sit-to-stand chair raises.
These are two tests commonly used in clinical settings to evaluate muscle function in older adults, the researchers noted.
A recent study shows that stronger muscle strength in women over 60 is linked to a lower risk of death over eight years. (iStock)
“In a community cohort of ambulatory older women, muscular strength was associated with significantly lower mortality rates, even when we accounted for usual physical activity and sedentary time measured using a wearable monitor, gait speed and blood C-reactive protein levels,” study lead author Michael LaMonte, research professor of epidemiology and environmental health at the University at Buffalo, told Fox News Digital.
“Movement is the key — just move more and sit less.”
Many earlier studies did not include those objective measurements, making it difficult to determine whether muscle strength itself was linked to longevity, according to LaMonte. “Our study was able to better isolate the association between strength and death in later life,” he added.
Even for women who don’t get the recommended amount of aerobic physical activity, which is at least 150 minutes per week, muscle strength remained important for longevity, the researchers found.
Women with greater muscle strength were more likely to live longer, even if they did not meet the recommended amount of aerobic exercise. (iStock)
“The findings of lower mortality in those who had higher strength but were not meeting current national guidelines on aerobic activity were somewhat intriguing,” LaMonte said.
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Federal guidelines recommend strengthening activities one to two days per week, targeting major muscle groups.
Resistance training does not have to require a gym membership, LaMonte noted. These exercises can be performed using free weights, resistance bands, bodyweight movements or even household items, such as soup cans.
Experts recommend working major muscle groups one or two days a week using weights, bands or bodyweight exercises. (iStock)
“Movement is the key — just move more and sit less,” he said. “When we can no longer get out of the chair and move around, we are in trouble.”
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LaMonte acknowledged several limitations of the study. The researchers assessed muscle strength in older age but did not explore how earlier levels in adulthood might influence long-term health outcomes.
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“We were not able to understand how strength and mortality relate in younger ages,” he said, noting that future research should explore whether building strength earlier could have an even greater impact on longevity.
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Compounds found in cannabis could provide a new roadmap for treating the world’s most common chronic liver disorder, according to a study released by the Hebrew University of Jerusalem.
The research, published in the British Journal of Pharmacology, found that cannabidiol (CBD) and cannabigerol (CBG) significantly reduced liver fat and improved metabolic health in experimental models.
CBD is the more widely studied non-intoxicating cannabinoid, while CBG is a less common “precursor” cannabinoid from which CBD is formed.
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Unlike THC, the primary psychoactive component in cannabis, these compounds do not produce a “high,” making them viable candidates for long-term medical treatment, the study suggests.
Metabolic dysfunction-associated steatotic liver disease (MASLD) currently affects approximately one-third of the global adult population, according to health data.
Metabolic dysfunction-associated steatotic liver disease (MASLD) currently affects approximately one-third of the global adult population. (iStock)
The condition, which is closely linked to obesity and insulin resistance, has few approved pharmaceutical treatments, the researchers said, leaving patients to rely largely on lifestyle changes that can be difficult to maintain.
“Our findings identify a new mechanism by which CBD and CBG enhance hepatic energy and lysosomal function,” said lead study author Joseph Tam, director of the Multidisciplinary Center for Cannabinoid Research at Hebrew University, in a press release.
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The study highlights a process called “metabolic remodeling,” in which the cannabis compounds created a “backup battery” for the liver by increasing levels of phosphocreatine, a high-energy molecule stored in muscle cells.
This energy reserve helps the organ function under the stress of a high-fat diet, which was an unexpected discovery, the team noted.
Researchers focused on CBD and CBG, two non-psychoactive compounds that offer therapeutic benefits without the “high” associated with THC. (iStock)
The researchers also found that CBD and CBG restored the activity of “cellular cleaning crews” known as cathepsins, enzymes that work within the cell’s recycling centers to break down harmful fats and waste.
With this process, the liver was better able to clear out dangerous lipids, including triglycerides and ceramides, which are known to trigger inflammation, the study showed.
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While both compounds were effective, CBG showed more robust results in certain areas, such as reducing total body fat mass, lowering “bad” LDL cholesterol and improving insulin sensitivity.
Researchers say this study opens a new path for using plant-based compounds to treat metabolic diseases by focusing on how cells manage energy and waste.
The discovery of a phosphocreatine “backup battery” in the liver marks a significant shift in how scientists understand the organ’s ability to survive high-fat diets. (iStock)
Limitations and caveats
Despite the promising results, the research team cautioned that the study was conducted in a controlled experimental environment. Further clinical trials are necessary to determine the proper application for human patients.
Other recent studies have pointed to potential issues with using cannabis as a medical tool.
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A major analysis published in JAMA examined more than 2,500 scientific papers from the last 15 years, including other reviews, clinical trials and guidelines focused on medical marijuana.
The 2025 review highlighted significant gaps between public perception and scientific evidence regarding cannabis’ effectiveness for most medical conditions.
Other recent studies have pointed to issues with the efficacy of cannabis as a medical tool. (iStock)
The researchers concluded that there are very few conditions for which cannabinoid therapies have clear, well-established benefits backed by high-quality clinical data.
“Whenever a substance is widely used, there is likely to be a very wide set of outcomes,” Alex Dimitriu, MD, who is double board-certified in psychiatry and sleep medicine and founder of Menlo Park Psychiatry & Sleep Medicine, previously told Fox News Digital. “This study points to the reality that this widely used substance is not a panacea.”
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The strongest evidence supports FDA-approved cannabinoid medications for treating specific conditions, including HIV/AIDS-related appetite loss, chemotherapy-induced nausea and vomiting, and certain severe pediatric seizure disorders, according to the review.
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Anyone interested in using marijuana for medical purposes should speak to a healthcare provider to discuss potential risks and benefits.
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While cannabis has recently come under fire for potential negative health risks, a recent study suggests that its use could increase brain volume and cognitive fitness.
Researchers at the University of Colorado Anschutz Medical Campus analyzed cannabis usage, brain scans and cognitive test results for more than 26,000 adults between the ages of 40 and 77, using data from the UK biobank.
The study found that cannabis users — particularly those who reported moderate lifetime usage — showed larger volumes in several brain regions.
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“Compared to individuals with no history of cannabis use, those who reported using cannabis showed larger volumes in several brain regions characterized by a high density of cannabinoid (CB1) receptors — regions involved in processes such as memory, information processing and emotion regulation,” lead study author Anika Guha, Ph.D., a researcher at the University of Colorado Anschutz Medical Campus, told Fox News Digital.
A recent study suggests that cannabis use could increase brain volume and cognitive fitness. (iStock)
The cannabis users also scored better on cognitive tests that measured learning, processing speed and executive function.
This outcome differs from many previous studies, which have focused on short-term cognitive impairment during or shortly after cannabis use, the researcher pointed out.
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“These findings suggest that the relationship between cannabis and the brain may differ across the lifespan, and that moderate use in mid-to-later adulthood may be associated with positive brain health outcomes,” Guha said.
Not all areas of the brain showed positive effects among cannabis users. The posterior cingulate, which is involved in self-reflection and memory, had lower volume with higher marijuana use.
“The takeaway is not that people should start using more cannabis based on these findings alone.”
As cannabis has been rising in popularity among all ages, this type of study is important for understanding its long-term effects and the pros and cons of use, according to Matt Glowiak, Ph.D., chief addiction specialist with Recovered, an organization that provides information and resources for mental health and addiction treatment.
The drug’s effects likely depend on factors such as age, dose, frequency, product composition and individual vulnerability. (AP Photo/Martin Meissner, File)
“Given the connection between cannabis use and larger brain volume, it is believed that it may help [older] individuals retain cognitive function that might otherwise naturally decline,” Chicago-based Glowiak, who was not involved in the study, told Fox News Digital.
“This is a huge benefit, but one we need to explore a bit further, ahead of encouraging those who would otherwise not consider integrating cannabis into their healthcare regimen.”
Limitations and caveats
As the study was observational in nature, it could not prove that cannabis use improves brain health — instead, it only showed an association, according to Dr. Marc Siegel, Fox News senior medical analyst, who was not involved in the study.
“The preponderance of previous evidence does not line up with improved cognitive function from chronic cannabis use,” Siegel told Fox News Digital. “This study is an outlier, and though it cannot be ignored, it is not justification for use.”
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The study also relied on the UK Biobank, which offers a “large and rich dataset,” Guha said — but it is limited to the questions that were originally posed to the participants.
“In particular, we have only a broad measure of how many times someone has used cannabis over their lifetime,” she said. “We do not have access to details about how they used cannabis, such as whether they smoked or used edibles, the type or potency of cannabis, or when in their life they used most heavily.”
Cannabis users scored better in learning, processing speed and executive function. (iStock)
“Those details likely matter a great deal for understanding how cannabis affects the aging brain.”
Given these limitations, Guha suggests that the findings should be seen as an early indicator that cannabis use may be related to brain aging, “and as a starting point for more targeted research that can tease apart these relationships.”
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“The takeaway is not that people should start using more cannabis based on these findings alone,” she emphasized. “While cannabis may have potential benefits in some contexts, a substantial body of research also documents important risks, underscoring that cannabis is neither completely beneficial nor completely harmful.”
The drug’s effects likely depend on factors such as age, dose, frequency, product composition and individual vulnerability, according to Guha.
“Given the widespread use and legalization of cannabis, it would be great to know that it is net-positive for brain health — however, this feels too good to be true, and too early to claim,” one expert said. (AP)
“As with any substance, individuals should consult with a healthcare provider before initiating use, particularly if they have a history of mental health concerns, as THC (the primary psychoactive component of cannabis) can exacerbate symptoms such as psychosis in vulnerable individuals,” she added.
Dr. Alex Dimitriu, who is double board-certified in psychiatry and sleep medicine and the founder of Menlo Park Psychiatry & Sleep Medicine, reiterated that this study is an “outlier,” as most previous research has shown “detrimental effects” from cannabis use.
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“Given the widespread use and legalization of cannabis, it would be great to know that it is net-positive for brain health — however, this feels too good to be true, and too early to claim,” he said. “I would advise proceeding with caution and moderation.”
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Dimitriu agreed that more large-scale studies and review papers are needed to get a “clearer picture.”
“What this cannabis study shows is that there may be conflicting information, which warrants more investigation.”
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