Health
Scientists reveal surprising brain benefit of laughter: ‘It’s a mental workout’
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The old saying that laughter is the best medicine may be true, according to new research that suggests it is also a vital catalyst for children’s development.
Laughter and play are fundamental to healthy brain growth, emotional well-being and social bonding, according to Jacqueline Harding, Ph.D., an early childhood expert at Middlesex University in London.
In her book, “The Brain That Loves to Laugh,” Harding argues that joy is a complex biological phenomenon that helps children navigate stress and build more resilient, receptive minds, news agency SWNS reported.
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“When we see children laugh, we witness the brilliance of the brain in action: learning, connecting and growing,” Harding told SWNS.
“Hope and humor, it seems, are not just the seasoning of life, but foundational to a recipe for healthy development.”
Laughter alters internal chemistry by decreasing stress hormones and boosting feel-good chemicals like serotonin, experts say. (iStock)
Laughter activates broad brain networks, including motor regions and the prefrontal cortex, long before children learn to speak. By helping the brain resolve conflicting ideas, it boosts creativity and engages working memory, acting as a “mental workout,” experts say.
At a molecular level, laughter alters the internal chemistry by decreasing stress hormones like cortisol and epinephrine. It also increases “happiness chemicals” like dopamine, serotonin and endorphins.
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Additionally, laughter is known to boost oxytocin, which deepens emotional bonds between parents and children.
Prolonged stress does the exact opposite: It impairs learning, suppresses immune function and alters the developing limbic system, which governs emotion and long-term memory, according to SWNS.
Prolonged stress can negatively impact not only children’s mental well-being, but their physical state as well. (iStock)
“Stated simply, the emotional state of young children directly influences how they navigate their way through the world,” Harding said.
Parents can foster these benefits through moments of spontaneous play and joyful connection, the expert advised.
“Spontaneous, joyful play is an antidote to stress.”
These interactions do more than spark laughter — they help children develop emotional regulation, strengthen feelings of safety and connection, and support social and cognitive development, according to the American Academy of Pediatrics.
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“Spontaneous, joyful play is an antidote to stress, as it increases levels of endorphins released by the brain,” Harding said. “Creative, happy play does its most brilliant work at a molecular level, especially at a time when the human brain is at its most receptive.”
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This shared joy also establishes “co-regulation,” where a child learns to manage their own stress by drawing on a biological store of positive early experiences.
Spontaneous, joyful play is an antidote to stress, as it increases levels of endorphins released by the brain, the expert said. (iStock)
Harding advocates for integrating humor directly into classrooms to reduce cognitive load and improve how children retain key concepts.
By uplifting the nervous system, joy creates an optimal environment for information absorption, as the SWNS piece noted.
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“Safe relationships and non-stressful play environments promote learning,” she added.
“The curriculum must never be prioritized over those two fundamental factors.”
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A new test could make it easier to detect high-risk prostate cancer cases earlier.
The blood test, called Stockholm3, is showing promise in clinical trials, beating out the traditional, standard prostate-specific antigen (PSA) test.
In a new study published in the Annals of Internal Medicine, researchers from the Karolinska Institutet in Sweden studied the test’s efficacy in more than 12,000 men — mostly Swedish or European — aged 50 to 74.
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All participants were tested with PSA and Stockholm3 and were followed for two years. During the follow-up period, 443 men were diagnosed with aggressive prostate cancer.
Stockholm3 detected 90% of aggressive prostate cancer cases compared to 74% for PSA tests.
Stockholm3 detected 90% of aggressive prostate cancer cases compared to 74% for PSA tests. (iStock)
Stockholm3 missed “significantly fewer” serious cancer cases than PSA. The number of men incorrectly classified as high-risk was similar across both tests, according to a press release.
Thorgerdur Palsdottir, a researcher at the Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, wrote in a statement that one of the major challenges in prostate cancer is being able to identify the cases that are “truly dangerous.”
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“Our results show that Stockholm3 identifies significantly more aggressive cancer cases than PSA without increasing the number of unnecessary follow-ups,” she said.
“These results point toward a potential change in how prostate cancer screening can be conducted,” the researcher added. “A more precise blood test could enable earlier detection of aggressive disease while reducing the number of unnecessary follow-up examinations and procedures.”
“A more precise blood test could enable earlier detection of aggressive disease while reducing the number of unnecessary follow-up examinations and procedures,” a researcher commented. (iStock)
Study co-author Hari Vigneswaran, chief medical officer of Stockholm3-maker A3P Biomedical, commented on these “promising” findings in an interview with Fox News Digital.
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He confirmed that the PSA has been the standard for prostate cancer screening since the 1990s despite its “well-documented limitations.”
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“It leads to invasive and costly follow-up testing, contributes to over-diagnosis of non-aggressive cancers and, most importantly, it misses a substantial share of aggressive disease,” Vigneswaran said.
When aggressive prostate cancer is found while still confined in the prostate, the five-year survival is close to 100%. (iStock)
When aggressive prostate cancer is found while still confined in the prostate, the five-year survival rate is close to 100%, which highlights the importance of early detection, according to the doctor.
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Data from the National Cancer Institute’s SEER database show that metastatic prostate cancer has risen over the past decade, suggesting that “we have not improved early detection of the aggressive, curable disease that screening is meant to catch,” Vigneswaran said.
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“The goal of screening is to find the cancers that need treatment while they are still curable, without raising the number of men who screen positive but don’t have aggressive disease,” he said.
Stockholm3 could reduce the need for unnecessary MRIs and biopsies, according to the researcher. (Getty Images)
Stockholm3 could reduce the need for unnecessary MRIs and biopsies, according to the researcher.
The findings did have some limitations. Stockholm3 is an investigational device and is not available for sale in the U.S., Vigneswaran noted.
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The test estimates a man’s risk of aggressive prostate cancer, but a biopsy remains the gold standard for confirming the disease.
The company plans to seek FDA approval to use the test for routine screening and will “generate the evidence needed to support that pathway, including U.S. data,” Vigneswaran said.
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Scientists have linked eating leafy green vegetables such as spinach, kale and broccoli to better lung health.
There are two primary forms of vitamin K found in foods. The primary kind is vitamin K1, found mainly in vegetables, which plays a major role in the body’s blood-clotting process.
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Vitamin K2 is found in fermented foods, certain dairy products, eggs and meats and helps regulate calcium in the body and supports bone health.
Researchers at Australia’s Edith Cowan University examined whether dietary intake of vitamins K1 and K2 was associated with chronic obstructive pulmonary disease (COPD), asthma and lung function.
Leafy green vegetables are high in vitamin K1, a nutrient that researchers have observed conributes to improved lung health. (iStock)
“Chronic respiratory diseases, including chronic obstructive pulmonary disease (COPD) and asthma, are among the most prevalent noncommunicable diseases worldwide and were the third leading cause of death in 2019, accounting for 4 million deaths and affecting 454.6 million individuals globally,” the scientists reported in the introduction to their study, published in The American Journal of Clinical Nutrition.
“Although asthma and COPD can be managed with available treatments, neither condition is curable, underscoring the need for effective prevention strategies,” they added.
The leading cause of COPD is smoking, the Mayo Clinic reported. Exposure to other irritants, such as dust, chemicals and pollution, can also cause it.
The researchers analyzed data from 179,062 participants over a 10-and-a-half-year period and concluded that, “Higher dietary vitamin K1 intake was associated with better lung function and a lower rate of COPD.”
Researchers found that people who increased their vitamin K1 intake were less likely to develop COPD. (iStock)
Participants who consumed the most vitamin K1 had a 16% lower likelihood of COPD, the researchers observed. The effects were more pronounced in smokers and participants with high-risk occupations.
Consumption of vitamin K2 did not result in lower COPD rates.
“No association was observed for vitamin K1 or vitamin K2 intakes and asthma,” the researchers also wrote.
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Associate Professor Marc Sim, who was involved in the study, said that it’s likely Vitamin K activates a protein that may help keep lung tissue flexible and prevent damage.
Because the study was observational, it cannot prove that vitamin K1 directly reduces COPD risk, only that higher intake was associated with better lung health.
Researchers have associated higher consumption of leafy green vegetables with better lung function. (iStock)
Just one extra serving of leafy greens “is an achievable way to boost your vitamin K1 intake,” said Chengfeng Li, one of the study’s researchers.
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Other foods rich in vitamin K1 include collard greens, Swiss chard, Brussels sprouts and turnip greens.
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