Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

To learn more about Yachtolt, visit yawcult.co.

J-P. That's Y-A-K-U-L-T dot-C-O-J-P. When it comes to a guide for your gut, count on Yacult.

Hi, this is Your Health Quickly, a Scientific American podcast series.

We highlight the latest vital health news, discoveries that affect your body and your mind.

And we break down the medical research to help you stay healthy.

I'm Tanya Lewis.

I'm Josh Fishman.

We're Scientific American Senior Health Editors.

On today's show, we're talking about a surprising way to slow cognitive decline, hearing aids. But unfortunately, most people who need them don't get them.

Hey, Tanya, I learned a new weird thing about the screwy U.S. health insurance system this week.

Oh, yeah? What's that? Health insurance doesn't cover hearing aids. Not at all?

No, not at all. It often doesn't cover hearing exams either. That's weird, since hearing loss is a medical problem.

I know, but I was talking with Lydia Denworth, who writes Scientific American Science of Health

column, and here's what she told me.

So the average pair of hearing aids that you would get through an audiologist will run you $4,700.

Most private insurance doesn't cover it.

And Medicare doesn't cover hearing aids.

I mean, it's crazy.

And what's really absurd is that hearing loss

...