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.C-O.J-P. When it comes to a guide for your gut, count on Yacolt.

This is Scientific American's 60-second science. I'm Christopher Entagata. Got a minute?

At 14,505 feet, Mount Whitney towers over California's Sierra Nevada range.

It's the tallest peak in the lower 48, which means it attracts thousands of weekend warriors every year.

Or make that weakened warriors. You see I'm staggering along the

narrow rocky trail, huffing for air, dizzy and exhausted from the low oxygen levels at high

elevation. And once they're sick, the best medicine is to go down. That's actually the only cure

that works. Sven Gaustad, a physiologist at the Norwegian University of Science and Technology.

He says previous studies suggest blood vessels tend to contract at high altitudes,

possibly because they need oxygen to relax,

exactly what's in short supply on mountaintops.

But there might be a dietary way to get more oxygen to your blood vessels,

in the form of beet juice. The juice contains nitrate, which the body converts to nitric oxide,

the compound that keeps arteries limber. Goustad and his colleagues tested that theory during a trek

in Nepal at 12,000 feet. Eight volunteers alternately drank shots of regular beet juice,

and another day, beet juice with the nitrates stripped out. A few hours later, the researchers

measured blood flow in artery diameters with ultrasound, and they found that the regular

beet juice did indeed restore blood vessels back to their low elevation flexibility, whereas

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