Live & Well Podcast, July 23. Featuring Dr. Daniel Ghiyam, MD.
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The peptide space is booming. A $7 to $10 billion gray market last year alone proves it. But here’s the problem: most people have no idea what a peptide actually is. And more importantly, most people buying them online have absolutely no idea what they’re getting.
Host Melissa Magsaysay sits down with Dr. Daniel Ghiyam to break down the science of peptides in a way that actually makes sense—and why the wild west of online peptide retailers should concern everyone.
What Is a Peptide, Actually?
Start with the basics. A peptide is how your body talks to itself. It’s text messaging between different parts of your body.
Scientifically, peptides are made of amino acids. Think of amino acids like Lego blocks—there are 20 of them. When you chain 3 to 5 together, it’s called a peptide. When they get bigger, they become proteins and hormones that do different things.
Here’s a real example: your brain releases a peptide that says you’re hungry, so you want food. Then when you eat, your stomach releases a different peptide that says food arrived—turn off the hunger signal. That same peptide (GLP-1, which everyone’s heard of) tells your stomach to slow down digestion, tells your liver to stop making sugar, and tells your pancreas to make more insulin.
The scale is staggering. Your body releases 3 to 500,000 peptides any given day.
The Peptide Market Has Exploded—For Better and Worse
The reason peptides have entered mainstream conversation is GLP-1s. Ozempic. Zepbound. These medications work, people see results, and suddenly the entire category got attention.
But with that attention came a massive problem: the gray market. Last year, an estimated $7 to $10 billion worth of peptides were sold through unregulated, illegitimate sources. These aren’t tiny numbers. This is a massive market operating in a regulatory gray area.
Dr. Ghiyam puts it bluntly: “A lot of people just ChatGPT this stuff, ordering it on some website they don’t even know where it’s coming from, and then just inject themselves.”
It’s like ordering insulin from a random website for your dad without any blood testing or follow-up. The stakes are real.
The FDA Approval Question Is Complicated
Here’s where it gets confusing. Some peptides have been around for decades—insulin is a peptide. There are blood pressure medications that are peptides. Some have robust FDA-approved studies behind them.
Others? Not so much. Many came from Russian research in the 1970s and 80s when researchers were trying to create “super soldiers” and astronauts. China repeated some of those studies. European countries have done their own work. But not all of it meets FDA criteria.
The challenge is that getting a drug approved takes 10 to 12 years and over $2 billion. Many peptides are hard to patent because they’re just 3 or 4 amino acids your body already makes. So why would a pharmaceutical company spend billions to get approval for something they can’t monopolize?
That’s why GLP-1s got modified. The natural GLP-1 your body makes doesn’t last long—it signals hunger for a few hours then stops. Pharmaceutical companies added modifications to make it last longer. First it was twice daily injections. Then once daily. Now it’s once weekly. That innovation is what they can patent and profit from.
In April 2024, the FDA actually removed many peptides from a “do not compound” list, acknowledging that compounding pharmacies could legally make them during shortages. But the legitimacy question remains: just because something is legal to make doesn’t mean the gray market versions are safe.
GLP-1s Changed Everything—But There Are Risks
GLP-1s are doing great things. People are losing weight. They’re feeling better. But there’s a huge caveat that no one talks about: what happens when you stop?
If you’re taking a GLP-1 and only suppressing your appetite without building muscle through resistance training, you’re in trouble. Here’s why: when you lose 20 pounds, roughly a third of that is muscle—if you’re not actively doing strength training to maintain it.
Muscle is your metabolic engine. Each pound of muscle helps burn calories and energy. If you lose 20 pounds and lose 7 to 8 pounds of muscle, then you get off the medication, you don’t have that muscle to burn calories anymore. You’re working with a downgraded engine. It’s like dropping from a V8 to a V4.
So people rebound. Fast. And often they gain back more than they lost because they’ve lost the metabolic capacity to burn calories.
The solution? You have to do resistance training while on GLP-1s. You have to change your eating habits. You can’t just let the medication do all the work.
BPC-157: The Promise and the Reality
BPC-157 has generated massive hype. It comes from gastric juices in the stomach and helps heal the gut lining. There’s tons of animal research. Some human research, mostly from other countries. A famous study showed that when researchers severed rats’ Achilles tendons, half the ones given BPC-157 were running around within two months.
But here’s the problem: that’s animal research. There aren’t robust human trials yet. And the internet is full of stories about miraculous recoveries.
The bigger issue: people think BPC-157 is a magic cure. It’s not. Dr. Ghiyam’s analogy is perfect: “You can fix your rim if we keep hitting the curb. What are you going to do? But you have to change what’s causing the problem, what’s causing the inflammation in the stomach.”
Peptides aren’t standalone solutions. They’re tools that work within a bigger picture of gut healing—testing, figuring out if there’s a leaky gut, addressing inflammation, changing diet. It’s foundational work.
Copper Peptides Actually Have Science Behind Them
In the beauty space, copper peptides (GHK-Cu) actually have legitimate research dating back to the 1970s. Studies show they help with collagen and elastin production, tighten skin, and even support wound healing and hair growth.
The difference? These are topical, not injected. The stakes are lower. The side effects in studies are minimal—maybe some local redness or irritation. There’s decades of research showing they work.
The Gray Market Is a Disaster
This is where things get dark. Someone who tests black market peptide batches told Dr. Ghiyam that one out of every ten batches he tests isn’t right. It’s not even close to what it’s supposed to be. Some batches come from China through websites with fake addresses—you look them up on Google Earth and the building doesn’t exist.
Some require cryptocurrency payment. Many have labels saying “not for human use, research use only”—a legal workaround that lets sellers claim they’re not marketing it for human consumption even though everyone knows that’s the intent.
The risk isn’t just that you’re getting a placebo (though placebo effect is real and accounts for about 25% of results in legitimate studies). The risks are:
You don’t know the quality. Peptides are fragile. Light degrades them. Heat degrades them. They need refrigeration in dark containers. If they’ve been mishandled during shipping, they’re worthless or harmful.
You don’t know the sterility. You don’t know if there are endotoxins or impurities. You have zero recourse if something goes wrong. Good luck finding where the website is located.
And if anything negative happens? You’re on your own.
Legitimate Medical Care Looks Different
A legitimate peptide practice means:
- Seeing an actual doctor
- Telling them your concerns
- Getting appropriate testing
- Receiving a customized protocol
- Being told exactly how to take it, when to cycle on and off
- Following up with blood tests to adjust dosing
- Monitoring your health markers
That’s not what you get from a website. That’s not an experiment. That’s medical care.
The Three Pillars Come First
Dr. Ghiyam is clear about this: the biggest things for anti-aging and longevity are sleep, stress management, and resistance training. Everything else—including peptides—is supplementary.
Peptides can help you build muscle. They can support deep sleep. They can help manage stress. But they can’t replace the fundamentals.
He tells every patient: “You have to have the M and Ms before you get started with us. Means and motivation.”
His oxygen analogy is brutal and honest: “If I put your head underwater, how long can you hold your breath? 30 seconds? 40 seconds? Your desire level for oxygen after that is a 10. Now, what’s your desire to lose weight and build muscle? A four or five? Get your desire to a 10.”
Peptides are tools. Tools help you do something faster. But if you don’t have the desire, the discipline, and the foundation, they won’t work. And more importantly, whatever progress you make won’t last.
Peptides Are the Future—But It’s Still Early
When people say “peptides are the future,” Dr. Ghiyam agrees. But with emphasis on future. There’s a lot we don’t know yet. Many peptides have promising mechanisms and animal data but lack robust human trials.
The most optimistic peptide he’s working with? Imrazec—an “exercise mimetic” that helps your body access fuel sources in a different way, almost like it’s helping you exercise.
The most skeptical? Any peptide without enough research behind it.