The Peptide PhDs Podcast

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...

In the series finale of the Four Pillars, we’re diving into mental and emotional well-being: the glue that holds your health together (or the reason it falls apart when you see an unwashed dish). From the "overnight therapy" of REM sleep to why your muscles are actually secret mood-boosting organs, we break down how your biology and your brain are in a constant, high-stakes group chat. P...

Welcome to the third leg of our Four Pillars of Health journey, where we’re finally giving sleep the spotlight it deserves . We will dive deep into the world of circadian rhythms, REM dreams, and why your body is actually busier than you think while you’re "resting." We explore everything from the "brain-washing" benefits of glymphatic cleansing to the critical growth hormone p...

We’re stepping into the second installment of our Four Pillars of Health series. Today, we’re moving past the "no pain, no gain" clichés to talk about the actual science of Movement. In this episode, our resident PhDs break down why "movement" is a much bigger category than just your time at the gym. We’re exploring how daily activity (or the lack thereof) dictates your metabol...

Last week, we laid the blueprint for the Four Pillars of Health. This week? We’re zooming in on Nutrition. We aren't just talking about "eating your greens"—we’re diving deep into the science of macronutrient mastery, the hidden dangers of the "under vs. over" eating trap, and the secret vibrance of phytochemicals. Plus, we’re revealing the "intelligence" behind your food. We’ll explore how natura...

Our bodies can’t run entirely on caffeine and sheer willpower. That's why Dr. Jones and Dr. Bartlett are launching a new series on the foundations of health: nutrition, movement, sleep, and emotional wellbeing. We call them the "Four Pillars," mostly because "The Stuff You Know You Should Do But Ignore" was too long of a title. We’re going to break down the science of why you feel the way you do (...

What happens when three science geeks trade their lab coats for lanyards and hit Las Vegas? In this episode, our hosts brave the neon jungle of the SupplySide Global Trade Convention—think Disneyland for supplement nerds, minus the churros. Together they hunt for peptides, pan for real scientific gold, and rack up more steps than a Fitbit challenge. Listen as they dive into the industry hype and c...

Just one day after launching RESTORED , our new restorative sleep peptide, The Peptide PhDs dive into the science of what makes great sleep truly great. We unpack sleep architecture, the rhythms of REM and non-REM, and discoveries reshaping how we understand rest. Deep sleep powers the brain’s glymphatic “night crew,” repairing muscles, tuning immunity, and clearing waste. REM sleep takes over as...

This week on The Peptide PhDs , Dr. Mark and Dr. Alan sit down with holistic health powerhouse Dr. Sarah Outlaw to talk about what to do when your health or fitness journey hits a wall. We dig into the “why” behind stalled progress, explore practical troubleshooting strategies, and look at how human behavioral science can help us stay consistent and motivated — even when the initial excitement fad...

Join the Peptide PhDs as Alan and Mark take you on a wild ride “from discovery to delivery” in the world of bioactive peptides! This episode dives into how scientists extract, validate, and manufacture nature’s powerful peptides—think AI-powered discovery, behind-the-scenes lab drama, and the magic of turning fava beans into health-boosting products. Plus, meet a multilingual guest who keeps the s...