Brain health is emerging as one of the major areas of scientific research in 2026, with researchers looking beyond the brain itself to understand how the heart, immune system, metabolism, exercise and everyday behaviour influence cognitive ageing.
The Salk Institute has designated 2026 as its Year of Brain Health, focusing on foundational research that could eventually contribute to new approaches for preventing Alzheimer’s disease.
Brain Health Starts Beyond the Brain
Scientists are increasingly studying the brain as part of a larger biological network. Cardiovascular fitness, for example, is being examined for its links with mitochondria, inflammation and brain function.
This approach could help researchers understand why maintaining overall physical health may also support healthy ageing of the brain.
The Immune System Could Hold Important Clues
The relationship between the immune system and the brain is another major research area. Salk scientists are investigating how inflammation, genetics, diet and pathogens can influence brain health.
Researchers are particularly interested in processes associated with amyloid and tau, proteins strongly linked to Alzheimer’s disease. Understanding these interactions could eventually reveal new ways to slow disease-related changes.
Metabolism and Brain Ageing
The way the body handles glucose and fats may also influence neurons. Researchers at Salk are studying lipid metabolism and how metabolic balance affects inflammation and neuronal survival.
They are also examining whether approaches such as time-restricted eating can influence pathways connected to brain health.
Exercise Gets a Bigger Role
Exercise is another important part of the research. Physical activity can influence brain-derived neurotrophic factor, a molecule involved in neuronal survival, learning and memory.
Salk researchers are studying both aerobic exercise and strength training to understand how physical fitness and muscle health may help protect cognition as people age.
Cognitive Health Is More Than Memory
Brain health is not limited to remembering names or events. It also includes attention, language, problem-solving and emotional wellbeing.
Researchers are studying how anxiety, fear and social isolation interact with changes in the brain, while also developing detailed cellular maps to better understand how cognition changes with age.
New Technology Could Change Brain Research
Modern tools are giving scientists new ways to investigate the brain. Salk researchers are using technologies including brain organoids, single-cell epigenomics, advanced imaging and artificial intelligence to study complex biological processes.
Why 2026 Could Be Important
The broader goal is not simply to treat neurological disease after it develops, but to understand the biological factors that may influence brain health much earlier.
Salk’s research programme highlights a growing scientific shift: preventing cognitive decline may require attention to the entire body rather than the brain alone. The work is still foundational research, so it should not be viewed as a proven Alzheimer’s prevention programme.