Comment

Comment by Dr. Krishna Kumari Challa on Sunday

Biomaterial made from jackfruit latex is a promising treatment for periodontitis

A biomaterial composed of jackfruit latex, pomegranate peel extract, and simvastatin forms a mucoadhesive matrix that enhances osteoinduction in vitro, indicating potential for periodontal tissue regeneration. The formulation supports localized drug delivery, increases bone formation, and may reduce systemic side effects compared to oral simvastatin.

Bruna V. Quevedo et al, Jackfruit latex-pomegranate extract biomaterial incorporated with simvastatin as a potential osteoinductive system for periodontal applications, Polymer Bulletin (2026). DOI: 10.1007/s00289-026-06358-w

Comment by Dr. Krishna Kumari Challa on Sunday

Why doesn't coffee taste like caffeine?

Through a series of tests aided by a trained panel, researchers discovered that caffeine must be interacting with other molecules present in coffee that significantly reduce its bitterness. In fact, coffee masked caffeine's distinctive taste until researchers added 10 times the normal amount of caffeine present in a typical brew.
Caffeine is highly bitter in isolation, but its bitterness is significantly reduced in coffee due to interactions with melanoidins and chlorogenic acid formed during roasting. These compounds, especially melanoidins, likely bind caffeine, preventing it from activating bitter taste receptors and resulting in coffee's characteristic, less bitter flavour profile.
To find the coffee molecules responsible for this effect, the team ran taste-tests of caffeine in solution combined with additional compounds: chlorogenic acid, which is naturally present in coffee beans, and/or melanoidins, which are products of the Maillard reaction that occurs during roasting.

The tasting panel found that when both compounds were combined with caffeine, the bitter taste was reduced by about half. Frank suspects that caffeine and melanoidins form a complex that—due to its size—prevents interaction with the bitter taste receptors on our tongues. The strength of the bond between caffeine and melanoidins may differ between different roasting processes, though future work is needed on this point.

A plethora of bitter stimuli, generated during the roasting process, culminate in the unique, bitter taste of coffee beverages.

Michael Gigl et al, Impact of Interactions between Melanoidins and Caffeine on the Bitter Taste of Coffee Beverages, Journal of Agricultural and Food Chemistry (2026). DOI: 10.1021/acs.jafc.5c17022

Comment by Dr. Krishna Kumari Challa on Saturday

Worm tablet could be repurposed as brain cancer treatment
Mebendazole, an antiparasitic drug, demonstrated consistent tumor growth inhibition and increased survival in laboratory and animal models of brain cancer, acting through multiple anticancer mechanisms and enhancing effects of chemotherapy and radiotherapy. However, human studies show limited and inconsistent efficacy, indicating that mebendazole remains an unproven candidate requiring further clinical trials before routine use in brain cancer treatment.

Ciara B. Blum et al, From anthelmintic to neuro‐oncology: A systematic review of mebendazole repurposing for brain tumour therapy, British Journal of Clinical Pharmacology (2026). DOI: 10.1002/bcp.70565

Comment by Dr. Krishna Kumari Challa on Saturday

AI fails classic attention test, with longer word lists triggering dramatic accuracy collapse
Transformer-based large language models exhibit a dramatic decline in accuracy on the Stroop task as word list length increases, particularly when word meaning and ink colour are mismatched. Unlike humans, who maintain high accuracy regardless of list length, LLMs default to word reading and fail to sustain task focus, indicating fundamental limitations in their attention mechanisms compared to biological systems.

Suketu Chandrakant Patel et al, Deficient executive control in transformer attention, PNAS Nexus (2026). DOI: 10.1093/pnasnexus/pgag149

Comment by Dr. Krishna Kumari Challa on Saturday

Previous studies have established how social media and online trends can have an impact on public health concerns and behaviors. So, the researchers investigated what people were searching for on the internet and compared what was being said in the media. They input keywords such as "vitamin A measles" and "cod liver measles" in Google Search Trends to see how often people in the U.S. searched for the terms between January and June 2025. Alongside this, they closely monitored press coverage, online mentions and social media statements on the topics.

The researchers found that interest in vitamin A and cod liver oil surged after public figures and government officials began promoting vitamin A. Searches for vitamin A rose 7.5 percentage points above expected levels, while searches for cod liver oil increased by 1.3 points. At the same time, poison centers reported a significant rise in exposure to dangerous amounts of vitamin A, most of them involving children.

The findings provide a clear example of how quickly media messaging might shape health-seeking behavior during public health crises such as measles outbreaks. Misinformation about health can have lasting impacts on a person's life, which calls for prompt attention and debunking by public health officials.

Anne Christine Bischops et al, Internet Searches for Vitamin A and Related Media Statements During the 2025 US Measles Outbreak, JAMA Network Open (2026). DOI: 10.1001/jamanetworkopen.2026.15013

Part 2

Comment by Dr. Krishna Kumari Challa on Saturday

Vitamin A poisonings rose almost 40% as measles misinformation spread in 2025

There can be too much of a good thing, and that has been the case with Vitamin A.
A recent study in JAMA Network Open has found that between January and March 2025, America's Poison Centers reported a 38.7% increase in vitamin A exposures during the measles outbreak across many states.
While it is not unusual for people to reach for acetaminophen (Tylenol) or ibuprofen to relieve fever or pain, the sudden interest in vitamin A in response to the measles outbreak was neither expected nor evidence-based, as it does not prevent measles. So what led to this uptick in search?

The researchers found that the surges coincided with two key events: the first of several media statements promoting vitamin A as a measles treatment on February 19, 2025, and comments by Dr. Suzanne Humphries on the hugely popular The Joe Rogan Experience podcast, where she promoted vitamin A and cod liver oil as treatments for measles. Misinformation, especially in a world that is chronically online, often spreads like wildfire.
Measles, also known as rubeola, is a viral disease that causes a high fever, cough, runny nose, red eyes, and a widespread rash. It spreads through the air when an infected person coughs or sneezes, and the virus can remain airborne for up to two hours after they leave the room. Measles can also cause serious complications, including pneumonia, brain swelling, and even death, particularly among young children and people with weakened immune systems.

Measles was once a common childhood illness, but thanks to vaccination, an estimated 59 million deaths from measles between 2000 and 2024 were prevented. The U.S. successfully eradicated the disease in 2000, and the 2025 measles outbreak has been the largest since then. The reluctance to vaccinate children against the disease is a major reason for the resurgence.
Along with hesitancy, interest also grew in alternative methods to prevent the disease, such as vitamin A and cod liver oil. Vitamin A is essential for good vision, skin, hair, and immunity, and can support recovery from measles when used under medical supervision. However, it does not prevent infection, and—when taken in excessive amounts—can lead to nausea, headaches, dizziness, and liver damage.
Part 1

Comment by Dr. Krishna Kumari Challa on Friday

Physicists Just Achieved 'Perfect Randomness' For The First Time Ever

One of the hardest things to do in physics is to generate true, provably unpredictable randomness. That's because it's impossible to determine randomness based on the output alone. Dice may have nicks and flaws that influence how they roll. Computer random-number generators are usually driven by algorithms. Even coin flips are governed by physical forces that, in theory, could be predicted. The difficulty lies not in generating numbers that appear random, but in showing that no one could have possibly predicted the outcome – that the system isn't secretly affected by subtle hidden rules or biases. Now, a team of physicists at ETH Zurich in Switzerland has overcome that challenge by leveraging one of the strangest phenomena in quantum mechanics: entanglement. The resulting sequence of zeros and ones is now really perfectly random, and they can even certify that!

https://www.nature.com/articles/s41586-026-10521-8

Comment by Dr. Krishna Kumari Challa on Friday

Early diet may shape how the teenage brain develops
Early-life diet, particularly during infancy, is linked to cognitive outcomes in adolescence, with poorer early nutrition associated with lower intelligence later on. Evidence for the impact of adolescent diet on brain development is mixed, highlighting the need for better-designed studies. The timing of dietary exposure, population characteristics, and intervention specifics influence observed effects.

Hayley A Young et al, Diet and the Developing Brain: A Systematic Review of Nutritional Influences on Adolescent Cognitive and Academic Outcomes, Advances in Nutrition (2026). DOI: 10.1016/j.advnut.2026.100648

Comment by Dr. Krishna Kumari Challa on Friday

How culture, stress, and social life may shape gut health
Gut health is shaped by complex interactions among biological, psychological, and sociocultural factors, including stress, social relationships, economic status, and cultural norms. Chronic stress and adverse social conditions can disrupt the gut–brain axis, alter gut microbiota, and intensify gastrointestinal symptoms. Holistic, personalized approaches that address both biological and psychosocial aspects are increasingly emphasized for effective management.

Reuben K. Wong et al, Sociocultural Aspects of the Pathophysiology, Clinical Presentation, and Management of Disorders of Gut–Brain Interaction, Gastroenterology (2026). DOI: 10.1053/j.gastro.2026.02.006

Comment by Dr. Krishna Kumari Challa on Friday

The authors concluded that giving anti-snake training to pregnant females makes their daughters, but apparently not their sons, more cautious around snakes.

Does this mean that at least females whose mothers had been trained survive better in the wild? The authors did not find any boost on survival after release. But they caution against concluding too quickly that no beneficial effects exist, given the small sample size and that all mice underwent exposure to snakes before release.

And how might the learned caution towards snakes have been transmitted from trained mothers to their female offspring?

"One possibility is prenatal programming, where stress hormones associated with predator training during pregnancy influenced offspring development before birth. Another is that the mothers behaved differently after the pups were born, which could likewise shape the latter's behaviour. It is also possible that pups detected lingering odour cues from the antipredator training in their mother.
Researchers don't yet know why female offspring responded differently than males, but sex-specific responses to stress and predator cues have been observed in other species. Maternal predator training may have amplified those innate differences.

Sex-specific Effects of Maternal Predator Exposure on Offspring Antipredator Behavior in an Endangered Mammal, Frontiers in Ecology and Evolution (2026). DOI: 10.3389/fcosc.2026.1783876

Part 2

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