Medical Bulletin 06/May/2026 - Video

Here are the top medical news for today:

Researchers Explore Broader Role of Creatine in Health Beyond Muscle Building

A simple compound powering gym gains is now stepping into the spotlight as a potential brain booster. Creatine, long associated with athletic performance, is increasingly being studied for its broader effects on energy metabolism, cognitive function, and even disease.

Naturally produced in the liver, kidneys, and pancreas, creatine is synthesized from amino acids and transported to tissues with high energy demands—primarily muscles, but also the brain and heart. Inside cells, it is converted into phosphocreatine, which helps regenerate ATP, the body’s primary energy currency. This rapid energy recycling is what allows muscles to perform during short, intense bursts of activity.

The most common supplement form, creatine monohydrate, has been extensively researched. It boosts muscle creatine stores, improving strength, power output, and exercise capacity. But its benefits may not stop there. Emerging studies suggest creatine could also support memory, mood, and mental processing speed, particularly in individuals with lower baseline levels, such as older adults or vegetarians.

Scientists are also exploring creatine’s potential in conditions like Parkinson’s disease, depression, and age-related muscle loss. Its anti-inflammatory and antioxidant properties make it an intriguing candidate for future therapies, though current evidence remains preliminary.

Despite its popularity, creatine is often misunderstood. It is not a steroid and does not directly build muscle. Instead, it enhances the body’s ability to produce energy, which indirectly supports better training outcomes.

Importantly, creatine is considered safe for most healthy individuals when used appropriately. Concerns about kidney damage have largely been dismissed in people without pre-existing conditions, though medical advice is recommended for those with kidney issues.

Still, creatine is not a cure-all. Its effects vary depending on individual biology, diet, and lifestyle.

REFERENCE: Mehdi Boroujerdi. Handbook of Creatine and Creatinine In Vivo Kinetics: Production, Distribution, Metabolism, and Excretion. CRC Press, 11 May 2026 DOI: 10.1201/9781003604662

Study Links Early Chemical Exposure to Increased Risk of Sperm Abnormalities in Men

Invisible chemicals may be shaping male fertility long before birth. A new study published in Environmental Health suggests that early-life exposure to persistent environmental pollutants can leave lasting effects on sperm health decades later.

Researchers led by Melissa Perry at George Mason University found that men exposed to certain chemicals in the womb and during childhood were more likely to produce sperm with abnormal chromosome numbers in adulthood. This condition, known as aneuploidy, can increase the risk of infertility, miscarriage, and genetic disorders such as Klinefelter Syndrome.

The study followed participants from before birth into early adulthood. Researchers analyzed blood samples collected from mothers during pregnancy in the late 1980s, then measured chemical exposure again when the children were 7 and 14 years old. Years later, semen samples from the same individuals—now aged 22 to 24—were examined for chromosomal abnormalities.

The focus was on so-called “forever chemicals,” including polychlorinated biphenyls (PCBs) and per- and polyfluoroalkyl substances (PFAS). These substances persist in the environment and accumulate in the body over time. Findings showed that higher exposure levels were linked to sperm carrying extra X or Y chromosomes. PCB exposure was mainly associated with additional Y chromosomes, while PFAS exposure was linked to abnormalities involving both X and Y chromosomes.

The findings add to growing concerns about how environmental pollutants affect reproductive health. With an estimated 7% of men affected by infertility worldwide, the study highlights the need for preventive strategies that begin early in life—even before birth.

While the research does not prove direct causation, it provides strong evidence that chemical exposure during critical developmental windows can have long-term consequences for genetic integrity and fertility.

REFERENCE: Perry, M.J., Meddis, A., Young, H.A. et al. In utero and childhood exposure to organochlorines and perfluorinated chemicals in relation to sperm aneuploidy in adulthood. Environ Health (2026). https://doi.org/10.1186/s12940-026-01303-w

Scientists Uncover How Glucose Influences Myelin Formation and Function

The brain’s wiring may depend on something as simple—and as powerful—as sugar levels. New research from the CUNY Graduate Center reveals that glucose is not just fuel for the brain but a key signal that directs how critical support cells develop during early life.

Published in Nature Neuroscience, the study shows that fluctuations in brain glucose levels help determine whether stem-like cells called oligodendrocyte progenitor cells (OPCs) continue to multiply or mature into oligodendrocytes—the cells responsible for forming myelin. Myelin is the protective sheath around nerve fibers that enables fast and efficient communication between brain cells, essential for milestones like movement, speech, and coordination.

Using advanced imaging techniques, researchers mapped glucose distribution in developing mouse brains and found a striking pattern. Regions with higher glucose levels contained actively dividing progenitor cells, while areas with lower glucose levels showed cells transitioning into myelin-producing forms.

At the center of this mechanism is an enzyme called ATP-citrate lyase (ACLY), which converts glucose into molecules that activate genes required for cell growth. When scientists removed ACLY in experimental models, progenitor cells struggled to multiply, leading to reduced myelin formation. However, the brain showed resilience—mature cells adapted by using alternative energy sources, such as ketone bodies, to continue producing myelin.

Remarkably, when these models were placed on a ketogenic diet, which increases ketone levels, myelin production improved. This finding highlights the brain’s metabolic flexibility and suggests new ways to support development when glucose pathways are disrupted.

The implications extend beyond early development. Conditions like multiple sclerosis, which involve myelin loss, could potentially benefit from therapies targeting these metabolic pathways.

Overall, the study reframes how scientists view brain development—showing that metabolism doesn’t just power the brain, it actively shapes its structure and function.

REFERENCE: Sauma, S., et al. (2026). Glucose-dependent spatial and temporal modulation of oligodendrocyte progenitor cell proliferation via ACLY-regulated histone acetylation. Nature Neuroscience. DOI: 10.1038/s41593-026-02263-7. https://www.nature.com/articles/s41593-026-02263-7