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.jp. When it comes to a guide for your gut, count on Yacult.

This is Scientific Americans' 60-second science. I'm Karen Hopkin.

They say that Marie Antoinette's hair turned white the night before she lost her head to the guillotine.

But can stress really have such a dramatic effect on hair color?

A new study in mice concludes that it can,

and credits overactive nerves with stripping the color from the animal's

locks, and possibly ours. Researchers at Harvard's stem cell institute were interested in the

stress and hair color issue, so they decided to take a closer look at the stem cells that give

rise to melanocytes, the cells that pump pigments into each hair follicle.

The stem cells were an obvious target.

Because changes in the stem cell population translates to changes in hair color,

which are very visible and easy to identify.

Yace Su, the study's senior author.

To start, she and her colleagues subjected mice to some rodent-sized

stressors, like having their cage tilted, their bedding dampened, or their lights left on all night.

So what did we find? We found that stress indeed leads to premature hair grain in mice,

but it took a long time for us to actually narrow down how it occurs.

First, they thought it could be the immune system, attacking the melanocytes stem cell population.

...