John Hamilton

Warren Yakowich of the University of Michigan says that kept the mice from feeling sick, but also meant they didn't lose weight.

Even so, companies that sell GLP-1 drugs are still trying to get rid of this side effect.

It's a major reason many patients stop taking the medications.

John Hamilton, NPR News.

I'm Dave Mattingly, NPR News in Washington.

Hey, Gina.

Just finishing up my prefrontal reps here.

Got to keep the old cortex shredded.

Nope.

Strike three.

Those all focus on really narrow skills.

You know, word recognition, number processing, throwing a turtle shell.

Cognitive fitness is more of a whole brain workout.

You're trying to build up these broad areas like working memory, processing speed, focus.

By the way, those are functions that tend to get worse as we age.

Okay.

Let me show you something on a laptop.

This is an exercise from a cognitive fitness study that we're going to talk about after the break.

Right, and this is a demo, so you're going to play along with them as they tell you what happens here.

Go ahead and start it.