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.

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

This is Scientific Americans' 60-second science. I'm Erica Barris. Got a minute?

Here's an easy way to find out if someone is a narcissist. Just ask them.

That's according to a study in the journal Plus One.

Researchers pose the following question to more than 2,000 people.

To what extent do you agree with this statement? I am a narcissist.

The researchers also provided participants with a definition of narcissist, egotistical, self-focused, and vain.

Not traits most people would want to be associated with, unless of course you're a narcissist.

A small percentage of the study subjects said they were.

Most said they were not. Then researchers had the volunteers fill out a lengthy narcissism

clinical assessment. Those who had rated themselves high on the narcissism scale also scored high

on the assessment. After 11 rounds of tests, the researchers concluded

that when the full 40-question clinical questionnaire

could not be done, the single item narcissism scale,

or sins, to what extent do you agree with the statement,

I am a narcissist, was a valuable tool.

Seems that there isn't much mystery

when narcissists themselves are asked to self-identify.

...