In this video Dr. Ashley Frazee, a primary‑care physician who positions herself as a peptide specialist, explains why the synthetic growth‑hormone‑releasing hormone (GHRH) analog tesamorelin is uniquely effective at reducing visceral (intra‑abdominal) fat, improving liver health, and supporting cognitive function. She describes the peptide’s mechanism: it mimics the full‑length GHRH hormone, remains stable in circulation for ~40 minutes, and directly stimulates pituitary GH release while also binding GHRH‑like receptors on visceral adipocytes. This dual action drives growth‑hormone‑mediated lipolysis, induces mitochondrial browning via UCP1, and activates the PGC‑1α master regulator of mitochondrial biogenesis, leading to increased fatty‑acid oxidation and a 37 % reduction in liver fat observed in a 12‑month Mass General study. Frazee contrasts tesamorelin with other GHRH‑mimetics (Sermorelin, CJC‑1295), emphasizing its full‑length structure and resistance to DPP‑4 degradation. She outlines practical ways to track visceral fat (DEXA, InBody, Hume BodyPod) and promotes the Hume BodyPod as a home‑use alternative. The video also covers regulatory and market realities: tesamorelin is FDA‑approved only for HIV‑associated lipodystrophy, carries a high price tag (~$6,000) and is restricted to a specific diagnosis, leading many to seek it on the black market. Safety concerns—including fluid shifts, peripheral edema, carpal tunnel, and potential tumor promotion—are discussed. Frazee concludes with a call‑to‑action for viewers to like, subscribe, consider her peptide‑coaching course, and engage in the comment discussion about the drug’s limited access.
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This video is about the peptide that decimates the most dangerous fat in your body while protecting your muscle, improving your liver, and sharpening your mind. And once you understand how it works, it changes how you think about fat loss. This video is all about tesamorelin, what it does, who it's for, and a bit on why I'm mad that it's not given more attention. I'm Dr. Ashley Frazee. I'm a primary care doctor with a bit of an edge, and I've become quite the peptide expert. When you search up the peptide tesamorelin, you immediately get results on its effects on visceral fat, and I've seen it work. But have you ever wondered why it works so well on visceral fat? Well, tesamorelin helps the pituitary, the little gland that lives at the base of your brain, pulse out more growth hormone because it looks like the hormone growth hormone-releasing hormone. Growth hormone is a powerful fat oxidizer. It's the signal our fat uses to mobilize itself out of storage. But get this, visceral fat, the inflammatory sticky fat around your organs that has the potential to kill you faster, has more receptors for growth hormone than the rest of our fat. So visceral fat is essentially listening for growth hormone signaling more intently than the rest of your fat. But not only is that cool, here's where it gets better. Because there are other peptides that increase growth hormone too. But they don't do this. Tesamorelin, Sermorelin, and CJC-1295 are all growth hormone-releasing hormone mimetic peptides, but Sermorelin and CJC-1295 are both variations of just a fragment of growth hormone-releasing hormone. Tesamorelin was designed as a full-length analog of the hormone, a clone, if you will. You can think of it like this. Sermorelin and CJC-1295, they work, but they're like kids who crash your party. They're there to have a good time and bounce. But Tesamorelin is the birthday boy. It's staying for the games, the cake, the toast, the whole thing. Sermorelin and CJC-1295, once they enter the body, they're broken down by an enzyme called DPP-4. And this allows them to do their thing by telling the pituitary to wake up and pulse out more growth hormone. But Tesamorelin, not only is it the full 44-amino acid clone of the GHRH hormone, but it's more stable and designed to stick around longer in the body, about 40 minutes. And the stability and the extra time that it has in the body allows it to travel to receptors outside of the brain and pituitary, like receptors on your visceral fat. And it's here on the visceral fat receptors that Tesamorelin is able to make some real physical changes. But it's not only mobilizing fatty acids here. No, here's where it gets better. Triggering those receptors on visceral fat cells also tells the cells to turn up the heat. It triggers something called mitochondrial browning and a protein called UCP1. Now, what the heck is mitochondrial browning? Think of it this way. You have white fat and brown fat. White fat, the stuff in your belly and under your skin and your cheeks, well, its job is to be lazy, kind of like the soldiers outside the Queen's Gate. Their job is just to be there and wait. Well, brown fat is different. It's packed with mitochondria, and its job is to burn energy to create heat. Babies have a ton of brown fat, and we lose it as we age. But mitochondrial browning is the process of taking a lazy white fat cell and forcing it to act like a brown fat cell. It's kind of like installing a furnace inside of a storage locker. Suddenly, that dead space has a very high-end purpose. Tesamorelin also triggers something called UCP1, or uncoupling protein 1, in order to turn on those furnaces we just installed. So UCP1 sits on the inner membrane of the mitochondria and it uncouples the process of energy production. And this allows energy to leak out of the production chain as pure heat. Remember your workflow before AI? It was always doable, just Slow and steady. And then you got ChatGPT and suddenly you're a presentation powerhouse. Well, that's what UCP1 does to your fat cells. I know it's kind of ridiculous. But there's more. So back in 2020, researchers at Mass General Hospital noticed that tesamorelin had crazy good effects at reducing liver fat. And did you know that having a fat liver is worse for you than having visceral fat? Well, these researchers took samples of their patients' livers before and after giving them tesamorelin. They knew there was a reason to do this at the beginning of the study. And after 12 months, the participants given tesamorelin had a 37% reduction in fatty liver deposits. But the reason was because inducing those GHRH receptors flipped the master switch of mitochondrial biogenesis. It's called PGC-1 alpha, and that turned on the production of new mitochondria and increased fat Fatty acid oxidation. I mean, to put it as simply as I can, activating PGC-1 alpha coordinates a massive multi-departmental tactical move inside the cell, and it excites me. Watch a video I made on that if you want to know more. I'll link it at the end. I'm not even done. In all of this research, we've actually learned that tesamorelin has the ability to downregulate inflammatory cytokines or signals which visceral fat is notorious for producing. Make visceral fat less inflammatory and you're doing a lot of good for your hormonal health. Tesamorelin has even been shown to improve cognitive deficits in people, turning down neuroinflammation while turning up the activity center of the prefrontal cortex, which was shown to help with executive function and memory in a study done on older adults. If you're actively doing something like using peptides like tesamorelin to lose visceral fat, it's really best to track visceral fat and to know where you start. It's also really rewarding to see the progress. There are different ways to do this. You can get a DEXA scan. I did this and I loved it. Or if you'd rather do something that's more accessible, you can get things like an InBody scan, or you can be like me and get a Hume BodyPod analyzer that I use at home. After I got my DEXA scan, I immediately started using different home analyzers, and the Hume BodyPod just gave me eerily similar results to my actual DEXA. Actually, it gave me the same exact body fat percentage and muscle mass that my DEXA did. And it's not just a smart scale, it's a body analyzer. It uses 8 frequency sensors to scan your arms, your legs, and your torso with 98% accuracy. Instead of just knowing my weight and feeling like I'm overweight for my height based on my BMI, I like using the BodyPod because I can see exactly where my fat and muscle mass is consistently. I also like that it gives me a visceral fat index, and if you have this number, aim for an index of 6 or less, but any downward trend if you're above that is excellent. So I got Hume Health to sponsor this video. Thank you to Hume Health. If you click on the link in my description, it can combine with Hume's current discounts to give you up to 50% off the total price. Plus you can use an HSA or an FSA for it. The discount from my link is good for 7 days after you click it. So I know what you're thinking. If tesamorelin is so amazing, why aren't we prescribing it for everyone who needs to lose visceral fat? That? I mean, there are risks and safety concerns, and I'll go over those in a minute, but I also want you to understand a bit on why you can't just go to your doctor and get them to write you a prescription for it, even if it is off-label. To understand this, you have to look at how the medical system in the United States works. Tesamorelin is approved for HIV lipodystrophy, and it wasn't born as a drug for HIV patients. It was created by a pharmaceutical company that knew that they had a fat-burning tool, but they needed a specific disease to prove it. In the '90s, HIV treatments were saving lives, but the patients were developing a lot of visceral fat in their bellies. And doctors doing studies on these patients discovered that these patients weren't just gaining weight in their abdomen, their bodies had stopped pulsing out growth hormone. And the visceral fat buildup was also bullying their hormones into like a metabolic downward spiral because the more visceral fat you have, the less growth hormone you pulse out, As well. So it's kind of a cyclical problem. And here's where the drug company who had tesamorelin saw an opening. So the drug company teamed up with the doctors, funded the trials, and proved that tesamorelin could fix this problem. It worked very well. This all led to a patent on the peptide and its FDA approval for use as a specialty drug with HIV-associated lipodystrophy. And it's because of this that nobody else can have it. And I have thoughts on this. But I'd love to see yours in the comments. Well, I hope that I've wowed you a bit on this peptide, but here's something to point out. Because the branded version costs $6,000 and is locked behind a specific diagnosis, we both know people are getting it elsewhere. I can't tell you where to find research peptides— please don't ask me— but I know that the black market of peptides is booming. So it's important to understand that there are downsides to just Anyone with a credit card using Tesamorelin. And here's what they are. Tesamorelin can cause a significant fluid shift in the body. In some people, that leads to swelling and tingling in the hands and feet. Even things like carpal tunnel are pretty common with it. Secondly, and more importantly, when you're messing with growth hormone pathways, well, growth hormone tells things to grow and recover and repair. That's the whole point. But it doesn't always discriminate. And so if you have a hidden tumor or a history of cancers or a strong family history of cancers, you really don't need to be fueling that fire. But on the flip side, if you're someone living with several pounds of inflammatory visceral fat or a fatty liver, I personally feel like doing nothing is its own massive risk. And, um, I can understand why people are seeking out this peptide. So here's the reality. We have a peptide that can selectively reduce the most dangerous fat in the body improve liver health, and even support brain function. And right now, mid-2026, it's only approved for a very specific group of people. And that's a hard pill to swallow, but it is what it is. And whether that changes or not, at least now you understand what it is and how it works. I'm Dr. Ashley Frazee. I'm just a peptide nerd, I guess. If you like this video, please hit like for me, subscribe to the channel. And if you're looking to start prescribing or coaching on peptides, or you just want to know more about the research and what these things can do, consider my course. I'll link it in the description, and I hope you have the best day.
