New psychedelic-like drugs could treat depression without making you trip

UC Davis researchers created brand-new psychedelic-like compounds by shining UV light on amino acid-based molecules. These compounds activated key serotonin receptors tied to brain plasticity and mental health benefits, but surprisingly did not cause hallucination-like behavior in animal tests. Scientists say the discovery could lead to future treatments for depression, PTSD, and addiction without the intense psychedelic experience.

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Your “um” and pauses could reveal early dementia risk

The little pauses, “ums,” and moments when you struggle to find the right word may reveal far more about your brain than anyone realized. Researchers discovered that everyday speech patterns are closely tied to executive function — the mental system that powers memory, planning, focus, and flexible thinking. By using AI to analyze natural conversations, the team found they could predict cognitive performance with surprising accuracy, potentially opening the door to simple speech-based tools that could detect early signs of dementia long before traditional testing does.

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New drugs could wipe out the “zombie cells” linked to cancer and aging

Researchers found a new way to kill harmful “zombie” cells that linger after chemotherapy and help cancers become more aggressive. These senescent cells survive by relying on a protective protein called GPX4, even while sitting on the edge of a deadly iron-triggered collapse. New drugs remove that protection, causing the cells to self-destruct. In mice, the approach reduced tumor size and boosted survival, hinting at a promising new cancer therapy.

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Scientists discover hidden fat-burning switch that could strengthen bones

Scientists at McGill University have uncovered a hidden molecular “switch” that turns on a powerful calorie-burning system in brown fat — the body’s heat-generating fat linked to metabolism and weight control. The breakthrough centers on glycerol, a molecule released when fat is broken down in the cold, which activates an enzyme called TNAP and triggers an alternative heat-producing pathway that scientists had struggled to explain for years.

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Ultra-processed foods linked to higher risk of heart disease and early death

Ultra-processed foods may be doing far more damage than many people realize. A major new European cardiology report warns that people who eat the most ultra-processed foods face significantly higher risks of heart disease, irregular heart rhythms, obesity, diabetes, high blood pressure, and even cardiovascular death. Researchers say these industrially manufactured foods — often packed with sugar, salt, unhealthy fats, and additives — can disrupt metabolism, trigger inflammation, and promote overeating, even when marketed as “healthy.”

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Brain scans reveal a shocking difference between psychopaths and other people

Scientists have uncovered a striking brain difference linked to psychopathy: people with psychopathic traits were found to have a striatum — a brain region tied to reward, motivation, and decision-making — that was about 10% larger on average than those without such traits. Using MRI scans and psychological assessments on 120 participants, researchers connected this enlarged brain region to thrill-seeking, impulsive behavior, and a stronger drive for stimulation.

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Scientists discover the brain’s hidden “stop scratching” switch

Scientists have uncovered a hidden “stop-scratching” signal in the nervous system that tells your brain when enough scratching is enough. The discovery centers on a molecule called TRPV4, which acts like part of an internal braking system for itch relief. In experiments involving chronic itch similar to eczema, mice missing this signal scratched less often—but when they did scratch, they couldn’t stop.

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Black licorice compound shows promise against inflammatory bowel disease

Researchers have developed a stem cell-based model of the human intestine that may transform how new IBD treatments are discovered. After testing thousands of compounds, they identified glycyrrhizin — a natural substance found in black licorice — as a promising anti-inflammatory candidate. In both lab-grown tissue and mice, the compound reduced intestinal damage and cell death linked to IBD.

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Scientists say this simple music trick can boost workout endurance by 20%

A new study shows that listening to your own favorite workout music can dramatically boost endurance. Cyclists exercising with self-selected songs lasted nearly 20% longer than when riding in silence, yet they didn’t feel more exhausted at the end. Researchers say music may help people stay in the “pain zone” longer without increasing perceived strain.

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A common constipation drug shows surprising power to protect kidneys

A common constipation drug may have unexpectedly unlocked a new way to slow chronic kidney disease — a condition that affects millions and often leads to dialysis. In a clinical trial involving 150 patients, researchers found that lubiprostone, a medication normally used to treat constipation, helped preserve kidney function in people with moderate CKD. Scientists traced the effect to changes in gut bacteria that boosted production of spermidine, a compound linked to healthier mitochondria and reduced kidney damage.

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