Mike Carruthers

But what does that mean, mild cognitive impairment?

Does that mean I forgot where I put my keys, or does that mean I can't do math?

Give me an example of mild cognitive impairment.

Again, a lot of what you just described, we tend to associate with decline in brain function as you get older.

So if it's happening in younger and younger people, what's causing it?

Well, I think everybody can relate to that.

I know I can relate to that.

If I don't get a good night's sleep, I know, I just know I don't perform as well the next day.

So what else?

What else besides getting more and better sleep?

OK.

Yeah, yeah, I suppose they do.

David Bardsley is my guest.

He is author of a book called Smarter Next Year, The Revolutionary Science for a Smarter, Happier You.

So, David, because people like the buzz, is there an acceptable level of drinking where it doesn't affect your brain?

What else?

I'm going to imagine that stress has a lot to do with this.

Huge, absolutely huge.

So if I vigorously run to the liquor store and... And you vigorously run back.

What else?