Nikhil Prasad Fact checked by:Thailand Medical News Team Jul 26, 2026 1 hour, 1 minute ago
Medical News: A new study has raised fresh concerns about the possible effects of excessive fructose exposure during early brain development. Researchers found that fructose interfered with the normal growth of brain cells, causing fewer nerve cells to form while increasing the number of support cells. The findings suggest that diets high in fructose during pregnancy may influence the earliest stages of brain development, although the research was conducted in laboratory-grown mouse cells rather than in humans.
New laboratory research suggests fructose can hinder the formation and healthy growth of developing brain cells
The research was led by scientists from The Lundquist Institute at UCLA Medical Center, the Department of Obstetrics and Gynecology at the David Geffen School of Medicine, University of California, Los Angeles, and the Laboratory of Metabolic Disorders and Obesity and Comorbidities Research Center at the University of Campinas, Brazil.
What the Researchers Investigated
The team studied neural stem cells taken from mouse embryos. These stem cells normally develop into neurons, which transmit signals throughout the brain, or astrocytes, which support and protect neurons. The cells were exposed to two concentrations of fructose for seven days to determine how the sugar affected their development.
Fewer Neurons and More Support Cells
The scientists discovered that fructose significantly reduced the number of neurons while increasing the number of astrocytes. This shifted the normal balance between the two cell types. Laboratory tests also showed lower levels of MAP2, a protein associated with healthy neurons, and higher levels of GFAP, a marker of astrocytes.
This
Medical News report highlights that maintaining the proper balance between neurons and astrocytes is essential because both cell types work together to build healthy brain networks. An imbalance during development could potentially affect how the brain forms connections needed for learning, memory, and normal brain function.
Brain Cells Also Grew Poorly
The researchers found that fructose did more than alter cell numbers. Individual neurites—the long extensions that allow neurons to communicate with one another—became significantly shorter after fructose exposure. Although the number of neurites remained largely unchanged, their reduced length suggests that developing neurons may struggle to establish efficient communication networks.
Higher fructose levels also reduced the size and perimeter of neuronal cell bodies. In addition, changes in the relationship between cell area and perimeter indicated that the neurons became structurally simpler and less mature. Together, these changes point to impaired neuronal growth and reduced structural complexity during a critical developmental period.
Why Fructose May Be Causing the Damage
The researchers believe several biological mechanisms may explain these findings. Prev
ious research suggests fructose can increase inflammation, oxidative stress, mitochondrial dysfunction, and disturbances in insulin signaling within the brain. Fructose metabolism also consumes large amounts of cellular energy and may trigger harmful molecular pathways that interfere with the normal development of neural stem cells. The team plans future studies to investigate these mechanisms in greater detail using advanced genetic and molecular techniques.
What the Findings Mean
Although this was a laboratory study using mouse neural stem cells rather than human subjects, the results strengthen growing evidence that excessive fructose exposure may adversely influence early brain development. The findings also support previous animal studies linking high-fructose diets with abnormal hippocampal development, impaired memory, and neurodevelopmental changes.
The researchers concluded that fructose not only reduces the formation of neurons but also weakens their structural development, potentially laying the foundation for altered brain circuitry. They emphasize that additional animal and human studies are needed before firm conclusions can be drawn, but the findings reinforce concerns that excessive dietary fructose during pregnancy and early life deserves closer scientific attention.
The study findings were published in the peer reviewed International Journal of Molecular Sciences.
https://www.mdpi.com/1422-0067/27/15/6653
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https://www.thailandmedical.news/articles/diets-and-nutrition
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