Etienne de Villers-Sédanier

Cognitive abilities start changing when we're about 40, 45.

And it's the same for acetylcholine.

For every decade after the age of 40, 45, you get around 2.5% decline in this neurotransmitter in key brain areas.

The other group was also doing a type of training, well, training, like video games, if you will, like Solitaire and Candy Crush, which can be addictive.

And a lot of people play this over and over again, but it doesn't engage the brain in the same way.

It was about 2.3%, which is not huge, but it's significant considering that you get a 2.5% decrease.

per decade just with aging.