Can You Grow Fresh Brain Cells? The Latest Research

For decades, the scientific community debated whether the adult human brain could generate new neurons, a process known as neurogenesis. Recent research increasingly suggests the answer is yes, with implications for understanding healthy aging and treating neurodegenerative diseases like Alzheimer’s and dementia.

The Long-Standing Debate

Early neuroscience, guided by Santiago Ramón Cajal in the early 20th century, posited that brain cells were “fixed, ended and immutable” in adulthood. However, scientists have been working to challenge this “harsh decree” for decades. The difficulty lay in directly observing cell division within the living human brain.

Breakthroughs in 2025

Significant progress was made in 2025. In July, researchers reported in the journal Science that they identified cells in adult human brain tissue exhibiting genetic markers of neurogenic stem cells. This provided strong evidence for adult neurogenesis. Later, in February 2026, a study published in Nature linked high cognitive performance in older adults to higher levels of new neuron production compared to their peers.

How Researchers Tracked New Neuron Growth

Early evidence came from methods like radiocarbon dating of neurons, first demonstrated in 2014, which showed some neurons formed after birth. Agnes (Yu) Luo, PhD, a molecular geneticist at the University of Cincinnati College of Medicine, highlighted this 2014 paper as particularly convincing evidence. More recent studies, like the one in Science, have allowed researchers to identify cells actively dividing to create neurons.

The Case of ‘Super-Agers’

The Nature study specifically focused on “super-agers”—individuals with exceptional cognitive abilities for their age. Researchers found these individuals may have a greater capacity for neurogenesis than their peers. Eva Feldman, a neuroscientist at the University of Michigan, noted that this study associates exceptional memory in individuals over 80 with a higher presence of immature neurons.

Where is Neurogenesis Happening?

Research from the Karolinska Institutet in Sweden, published in Science, pinpointed the hippocampus—the brain region crucial for learning, memory, and emotion regulation—as a key site for ongoing neurogenesis even in late adulthood.

What Does This Imply for the Future?

While the debate has shifted from if neurogenesis occurs to how often, from whom, and why, the implications are significant. If a link between neurogenesis and cognitive resilience is firmly established, it could pave the way for interventions—through lifestyle adjustments, environmental factors, or future medical therapies—to promote continued neuron growth and maintain brain health.

Key Takeaways

• Adult neurogenesis – the growth of new brain cells – is increasingly supported by scientific evidence.
• Recent studies in Science and Nature have provided compelling data on neurogenesis in adult humans.
• “Super-agers” may exhibit higher levels of neurogenesis, contributing to their exceptional cognitive function.
• The hippocampus is a key region for ongoing neurogenesis throughout adulthood.
• Further research is needed to understand how to promote neurogenesis and maintain brain health.