23/10/2025
A 10-week study of people 65 or older found that doing rigorous mental exercises for 30 minutes a day increased levels of the chemical messenger acetylcholine by 2.3% in a brain area involved in attention and memory.
Even healthy brains decline with age. Here's what you can do
The increase "is not huge," says Étienne de Villers-Sidani, a neurologist at McGill University in Montreal. "But it's significant, considering that you get a 2.5% decrease per decade normally just with aging."
Scientists have found the first compelling evidence that cognitive training can boost levels of a brain chemical that typically declines as people age.