Podcast Episode

This Peptide Burns Fat and Builds Muscle — But the Man Who Discovered It Won't Take It - Yet

Who’s talking

2 speakers
Pinchas Cohen1 hr 13 min · 82%
Chris Wharton15 min · 18%

Transcript

140 turns · 1 hr 29 min
PC
Pinchas Cohen0:00

GLP-1 family of drugs are a remarkable advance in human health. However, there are some major downsides of GLP-1. The biggest one is muscle loss. Up to 30% of the weight people lose on GLP-1 is muscle. MOTC, by the way, maintain muscle mass in various models, but also prevents osteoporosis in various mass models. They lost weight, they improved their blood sugar,

CW
Chris Wharton0:29

helps with fat loss, helps build, if not at least prevent the loss of lean tissue, and helps metabolic health, mitochondrial function. Sounds too good to be true, right?

PC
Pinchas Cohen0:41

That's the beauty of the 503A path, that it will allow people to have access to potentially valuable products, peptides, that aren't proven to be really effective. They may be, but they're at least considered safe. A lot of money has gone in to develop interventions for Alzheimer's disease. tens of billions of dollars with really nothing that works we discovered one such peptide that we call schmooze 20 of europeans have a mutation in schmooze that makes it less active and they have a 50 increase in the risk of alzheimer's

CW
Chris Wharton1:18

disease do you think there is ever a world where we replace some of these major lifestyle interventions with a peptide

PC
Pinchas Cohen1:24

so i'm a big believer

CW
Chris Wharton1:39

Hassi, I am so excited to have you here today for a whole host of reasons. Peptides is the thing that everyone is talking about right now. There is so much confusion, so much misinformation. And I think despite everyone having an opinion on it, there's probably not that many people who are qualified to do so. And so I think that a really good place to start would be why you are so qualified to do so you know i know you spent your career studying um these mitochondrial derived peptides specifically and then maybe give us like a really high level definition of what they are and i think we hear differing opinions here too a nice easy one to start

PC
Pinchas Cohen2:21

First of all, Chris, it's great to be here, and I really think this is a very important vision to communicate. I'm an endocrinologist by training, and my entire career has been focused on hormones and how they can be used to improve human health. And before the concept of peptides became a thing, many of the hormones that we worked with were in fact peptides. The best example is insulin, which is a peptide that has profound effects on blood sugar and metabolism. And my career transitioned from working on the standard hormones like insulin and growth hormone, which was my area of expertise, in the 20th century to work specifically on peptides. Because in the turn of the century, I was working on an obscure molecule known as IGF-BP3, which was a regulator of IGF-1, which is also a peptide. And in fact, there are forms of IGF-1 that are among the different peptides people tend to use these days.

CW
Chris Wharton3:42

IGF being insulin growth factor.

PC
Pinchas Cohen3:43

Insulin-like growth factor. And we were intrigued by the fact that this IGF-BP3 molecule seemed to have done all sorts of things beyond binding the insulin-like growth factor, IGF. so we used a technique called yeast to hybrid system which is a very complicated genetic screen for protein protein interaction and we cloned a new molecule that later became known as humanin which the intriguing part about it it

Episode notes

What's actually in the syringe when you buy a peptide off the black market?

Now that the FDA regulation around 6 of these black market peptides is changing, should you be taking them?

Should you be concerned about the link between GLP-1 use and lean tissue loss?

Dr. Pinchas Cohen, PhD, is the scientist who co-discovered humanin and MOTS-c — two of the mitochondrial-derived peptides now driving the biggest wave of interest in longevity science — and he currently serves as Dean of the USC Leonard Davis School of Gerontology.

Peptides have become a catch-all buzzword for a category that actually spans thousands of distinct molecules, most of them still unstudied. Dr. Cohen's lab discovered several of the ones people are now injecting themselves with, and he's spent the last year watching an unregulated market grow around his own research — to the point where he tested his friends' black-market MOTS-c and found some vials contained none of the peptide at all.

Up to 30% of the weight lost on GLP-1 drugs is muscle. A genetic variant found in Ashkenazi Jews makes carriers roughly 20 times more likely to live to 100 and appears to blunt the effects of the biggest known Alzheimer's risk gene. In mice, MOTS-c extended lifespan by 10% and prevented the muscle and bone loss associated with GLP-1 use. And in July, 2026, Dr. Cohen testified in front of the FDA panel now reviewing

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