Wendy Zuckerman

And in high doses, it's not safe.

It can increase your risk of heart disease and cancer.

But it's been studied for a long time and it can help you build a bit of muscle and make you bigger.

In fact, not just you.

Okay, but away from the Chihuahua, what happened when Keith put these peptides on his lab-grown tendons?

Keith's team tested BPC-157 a different way, bathing some human cells in it to see if they replicated faster.

And again, it didn't really do anything.

Now, this doesn't totally put the kibosh on BPC-157.

Keith has just started studying this.

He hasn't even published the data yet.

He wants to keep running tests.

And he says that just because BPC-157 might not do anything to his tendon in a dish... Doesn't mean that it doesn't do something when you put it into a body.

So, for example, other researchers have found evidence in rats and basically petri dish studies that BPC-157 might promote something called angiogenesis.

And Keith says you wouldn't see new blood vessels popping up on what's basically a disembodied tendon in a dish.

So to find out if this peptide really does increase angiogenesis and more broadly helps you heal from injuries, we really need to test it in a human body, right?

Not just human flesh.

So what studies do we have here?

Let me tell you.

So in 2015, a placebo-controlled safety trial for BPC-157 was registered on the U.S.

government's website for clinical trials.