The agency warns that plasma treatments costing thousands of dollars, which supposedly treat the infirmities of old age, have not been proven “safe or effective.”

A study compares verbal and math test scores to air quality measurements in China and finds a correlation.

The test uses levels of plasma amyloid-β to estimate the buildup of protein plaques in the brain.

A team of Stanford University researchers say that administering young people’s blood plasma to Alzheimer’s patients could improve cognitive function, but the results have been criticized.

Researchers are piecing together the links between the gut microbiome and mental health.

A literature review finds little evidence that commercial brain-training games can improve everyday cognitive performance, citing methodological shortcomings.

Biogen’s aducanumab reduces amyloid-β plaques in a dose-dependent manner, according to interim results of a Phase 1b clinical trial.

Mental agility in women deteriorates at twice the rate of that in men, according to a study of people with mild cognitive impairment.

Online brain-training is gaining popularity, but so far little evidence exists to support claims of improved cognition.