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 Yacolt.

This is Scientific American's 60-second science. I'm Christopher in Taliatta.

Long ago, before Band-Aids or even medicine of any kind, our ancestors evolved to heal cuts themselves.

If you got sliced open, the body blocked it up to prevent blood loss, water loss, infection.

But as we gained that power, we sacrificed something else.

So we've evolved to heal very quickly, or as quickly as possible,

at the expense of regenerating skin the way it used to be.

George Cotsarellis, a skin biologist at the University of Pennsylvania,

who studies that

newly healed skin, also known as scars.

And the feature of scars is that they don't have hair follicles, sweat glands, or fat.

In that observation lies a clue, which Cotsarales and his team investigated in mice.

They found that when mice were injured, hair follicles sometimes regenerated at the wound

site.

And where hair cells appeared, fat cells did too, the fat that sits under normal skin as a cushion.

The bottom line is that the follicle has these almost magical powers where it's really normalizing the skin architecture.

Meaning hair cells are a good thing for reducing scarring.

In their latest work in the journal Science, they isolated a growth factor called BMP from the hair follicles.

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