Katie Couric

And it will...

impact how a particular individual is monitored.

I can't talk for some reason anymore, you guys, so I apologize if I'm being inarticulate.

But are you seeing progress in that area too?

When is that going to be available, do you think, to the general public?

And I don't know if I'd want to know if I was going to get Alzheimer's or Parkinson's.

I guess there are some new medications that can stave off Alzheimer's.

I think

I'm not sure what can be done for—my dad had Parkinson's.

I don't know what else could be—what could be done in terms of preventative measures if you find out early enough about that.

But, you know, these retina scans, when will they be available?

By the way, everyone who's just joining, I'm talking to Dr. Eric Topol, and we're right now going to get to his book in two seconds.

But tell me about the retina scans.

That's so crazy.

That's so exciting.

Well, let's move on to your book, Super Agers, because people are really interested in longevity.

So interested, there's a lot of pseudoscience out there.

So before we talk about what works, let's talk about what doesn't.

And I know you take on biohacking, pseudoscience, anti-science movements.

And all these things, you know, all this, I don't know, malarkey that's out there that is telling people certain things that just have no basis in science.