The Peptide PhDs Podcast

A tiny peptide. Stomach acid. Digestive enzymes. A whole lot of molecular scissors. So, what actually happens during digestion? In this episode of The Peptide PhDs , Dr. Mark and Dr. Jones tackle one of the biggest questions surrounding natural peptides: Can they actually survive digestion? With a little help from “Dora the Peptide,” they follow the journey from the stomach to the small intestine,...

Muscle has apparently been running a group chat with the rest of your body this entire time, you might have just had it on mute. This week, The Peptide PhDs dive into the surprisingly chatty world of muscle. Active muscle can release hundreds of chemical messengers called myokines, communicating with everything from your brain and bones to your immune system and metabolism. The guys break down wha...

Peptides usually get talked about for things like sleep, muscle, skin and metabolism. This week? Rattlesnakes and deadly spiders enter the chat. The Peptide PhDs explore the surprisingly wild side of peptide science, from venom and nature-made defense systems to the discoveries that have helped inspire modern peptide research. They also break down why peptide sequence, target and half-life matter,...

You did it. You are about to know about everything beauty! This episode of The Peptide PhDs breaks down how collagen gives skin structure, elastin provides bounce, hyaluronic acid helps with hydration, and peptides act like tiny text messages telling skin cells what to do. They also cover what ages skin from the inside out, and it's, well, it's exactly what might think it is; oxidative str...

The Peptide PhDs are back for round 2 of their deep dive into beauty. Apparently, skin has a language, but it is not fluent in expensive moisturizer. In this episode, the Peptide PhDs explore how collagen fragments and bioactive peptides act as biological messages, telling the skin’s fibroblasts when it is time to repair, rebuild, and remodel. They unpack the science behind a smarter skin-support...

What if we told you, in this episode, Dr. Jones and Dr. Mark are talking about tanning and new clothes? Don't worry, our PhDs aren't out on the town going for a new look. No, in this episode of The Peptide PhDs, they are talking about a different outward appearance: the skin. Our skin is more than just stuff holding other stuff in, and it's certainly more complicated than what's ha...

What do our founding fathers and peptide signaling have in common? More than you might think. In this special Independence Day episode, Dr. Mark and Dr. Allen dive into myokines, metabolism, muscle, and modern peptide science. Along the way, they explore why muscle is the currency of healthy aging, how sleep and nutrition keep your internal communication systems firing, and why the most powerful h...

Protein is having a moment—and, as usual, social media has made things complicated. Are you eating too little, consuming too much, or just aggressively shaking powder into a bottle and hoping for the best? In this episode, the Peptide PhDs get under the hood of protein to explore what actually matters: amino acids, digestibility, leucine, muscle protein synthesis, and why two foods with the same n...

This week, The Peptide PhDs are putting your brain on peptides—and no, this is not another scrambled-egg public service announcement. Dr. Mark Bartlett and Dr. Alan Jones break down how peptides and amino acids help create a communication network between the brain and the rest of the body. From the gut-brain axis to inflammation, stress, sleep, nutrition, and muscle signaling, your brain is receiv...

After a long hiatus, we're back! Dr. Mark and Dr. Alan dive into body composition—aka why the number on the scale is not the whole story, and sometimes not even the right story. Come unpack the difference between weight loss and improving the ratio of lean muscle to body fat, explaining how muscle acts like a metabolic engine while excess visceral fat can drive inflammation, insulin resistance...

In this episode of Peptide PhDs , Dr. Mark and Dr. Alan wrap up their three-part tour through the 12 hallmarks of aging by tackling the final four: stem cell exhaustion, altered cellular communication, chronic inflammation, and dysbiosis. Translation: the body’s repair crews get tired, the cellular group chat starts dropping messages, the immune system gets stuck in “red alert,” and the gut microb...

In part 2 of our Hallmarks of Aging series , the PeptidePhDs are back on the case — detective hats, zombie cells, muscle talk, and all. This episode dives into five more biological “clues” behind aging. From proteins that stop folding properly to cells thatforget how to take out the trash, the conversation makes complex aging science feel surprisingly approachable. The star of the episode? Movemen...

Ever wonder why we age... at the cellular level? Have you ever heard of "zombie cells"? Well, you should, because they’re currently throwing a party inside your body—and they didn't invite you. This week, Dr. Mark and Dr. Alan kick off a brand-new series breaking down the 12 Hallmarks of Aging —the definitive, science-backed framework researchers use to decode how and why our bodies change over ti...

Has Dr. Jones been replaced?! With him away in Barcelona, Dr. Mark flies solo—luckily, Crystal is here to keep him honest! This week, we're diving into a major Science News article asking the big questions: Are peptides truly proven health aids, and is the FDA about to open the door regardless? We break down the facts to give you a clear, science-backed perspective on the future of the industr...

The mitochondria is the powerhouse of the cell. Great. Now that we’ve cleared high school biology, let’s talk about why you’re actually exhausted. Most people think "low energy" is just a sleep deficit. Spoiler alert: It’s usually not. In this episode, Dr. Mark Bartlett and Dr. Alan Jones go sub-atomic to show you what’s really happening inside your engine. We’re breaking down: The ATP B...

Dr. Mark Bartlett and Dr. Alan Jones are back on the Peptide PhD Podcast to remind us that weight loss is great, but muscle is better. They continue their deep dive into body recomposition and why building and keeping muscle matters way more than just losing weight. In this episode, they break down the essentials: high-quality protein, the magic of deep sleep, and the risk of losing "the good...

Stop letting a piece of bathroom floor plastic gaslight you every morning. In this episode, Dr. Mark and Dr. Alan break down why "losing weight" and "getting healthy" aren't always on speaking terms. If you’ve ever hit your goal weight only to realize you still feel like a bag of smashed potatoes, this one is for you. The highlights: Why body composition is the metric that...

Turns out, "Pirate’s Disease" isn't just for 17th-century sailors on wooden ships. This week, we’re breaking down why your modern weight loss journey shouldn't leave you looking like a scurvy soldier. In this episode, we cover: The GLP-1 Nutrition Gap: "Yo ho ho" and a bottle of... Vitamin C? Why intense appetite suppression requires a serious strategy for protein and m...

We usually blame aging on gray hair and sensible shoes, but the real culprit is The Great Muscle Vanishing Act. Science is now proving that muscle isn’t just for mirror selfies—it’s actually your primary organ of longevity and your best defense against "throwing your back out while sneezing." In this episode, we’re diving into the biological levers that control your strength. We’ll explo...

This week, we take a closer look at the "gray market" peptides often found in fitness circles. These are not FDA-approved medications or natural bioactives; they are "research use only" compounds that sit in a regulatory legal gray area. We looked past the anecdotes to see what the data really says. Here is the reality of the peptide "Wild West": Clinical Scarcity: Mo...

In this episode, we’re debunking the biggest myth in fitness: that turning 30 (or 40, or 50) means your metabolism is headed for a permanent vacation. Spoiler alert: Your internal engine is actually doing just fine! The real issue is that we tend to trade the gym for the couch and muscle for... well, not muscle. What you need to know: Muscle = Currency: It’s the most active tissue you’ve got. Don&...

Sorry, we nerded out a little too hard last time. If our last episode felt like a 400-level biochemistry lecture, consider this your palate cleanser. We heard your feedback: the science was heavy, and your brains were full. This week, we’re stripping back the jargon and getting back to basics. What’s on the menu: Peptides 101: What they actually are (without the PhD). The "Why": How they...

Think of peptides as the body’s internal group chat—and this week, we’re eavesdropping on the conversation. Join Dr. Mark and Dr. Alan as they strip peptides down to the bare essentials. We’re moving past the buzzwords to explain how these short-chain amino acids act as the ultimate biological messengers. In this episode, we’re breaking down: - The Lock-and-Key Club: How cells actually "talk&...

Welcome back to the sequel your metabolism has been waiting for. In Part 2 of our GLP-1RA deep dive, Dr. Mark Bartlett and Dr. Alan Jones make sure you don’t accidentally trade your biceps for a smaller belt size. While these drugs certainly move the needle, we’re peeling back the curtain on the "muscle tax"—the reality that a significant chunk of rapid weight loss can come from the very...

In this opening episode of our two-part series, Dr. Mark Bartlett and Dr. Alan Jones introduce the fundamental science behind GLP-1 receptor agonists, moving beyond the headlines to explore how these therapies actually function within the body. We weigh the significant metabolic benefits against potential drawbacks, providing a balanced look at the pros and cons of synthetic therapy. A central foc...