12. Peptides Part 3: Real Talk on Safety, Sourcing & Are They For You?

You've done the research. You know peptides exist. But now the real questions start: where do you actually get them, are they safe, and how do you know if they're even right for you? This is the episode no one in the peptide space wants to make — the regulatory reality, the sourcing minefield, and a clear framework for deciding whether peptides belong in your toolkit at all.

In this episode:

• You'll hear three real-world midlife scenarios — muscle loss despite lifting, post-COVID inflammation that won't resolve, and brain health concerns — and which peptides might fit each one
• You'll understand why sourcing is the most dangerous part of the peptide conversation, and what "certificate of analysis" actually means (and doesn't mean)
• You'll learn why the FDA crackdown on peptide compounding happened — and what the April 2026 reclassification actually changes
• You'll get a clear explanation of why your doctor probably can't talk to you about peptides — and what that means for your access
• You'll walk away with three questions to ask yourself before you consider any peptide protocol
• You'll get Mary's shortlist of the most credible experts in the peptide space to learn from — no “bro science” here!
• You'll hear the fascinating Cold War origin story of peptides
   

Links & Resources

Better Beyond 40 Formula — Dr. Mary's signature BB40 program helps peri/menopausal women THRIVE 

👉 Watch the FREE MasterClass that explains her BB40 approach 

Join the FREE BB40 Community on Skool

Newsletter — weekly guidance from Dr. Mary

Instagram @drmarypines

Full show notes, citations, and transcript: drmarypines.com/podcast

Peptides mentioned: 

CJC-1295

Ipamorelin

BPC-157

Thymosin Alpha-1

Thymosin Beta-4 / TB-500

Selank

Semax

GLP-1 agonists

Epitalon

Experts mentioned: Dr. Elizabeth Yurth (Boulder Longevity Institute), Dr. William Seeds (SSRP Institute), Dr. Kent Holtorf (Integrative Peptides)

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This content is for educational purposes only and is not medical advice. Please work with a qualified provider before starting any new health protocol. This content does not establish a patient-provider relationship with Dr. Mary Pines.

Transcript

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This is part three and the final episode in our three-part peptides series. If you haven't heard parts one and two, episodes ten and eleven, which covered what peptides are and the specific ones I tend to reach foremost with my clients and myself, then please go back and have a listen. So today we're jumping in at the practical turning point, some real women, real scenarios, and we're getting into the part no one really is sure about, it seems. There's a lot of conjecture in the media, la la la, but actually there are some clear pieces that we need to understand about sourcing, safety of peptides, where regulatory is at, which is a little bit murky, and how to know if peptides are right for you right now. Welcome to the Better Beyond 40 Formula podcast, where smart driven women and those who support them dish the confusion and cut through the midlife wellness nonsense. I'm Dr. Mary Pines, award-winning PhD biomedical scientist of 25 years, with a decade in women's health and longevity consulting. I specialize in transforming the health and lives of midlife women around the world from their late 30s to early 60s by delivering clarity and practical real life solutions with honesty, compassion, and a little humor. And in this podcast, I'm gonna share my top tips and tricks from within my one-on-one coaching program to help you redefine what's possible for yourself and feel unmistakably better beyond 40. Alright, so some real-world scenarios. Let's make this practical with a few instances many of you may recognize. So instance number one. I lift each protein and I'm still losing muscle or bone. Let's say you're a 54-year-old woman, you're postmenopausal, you're on good quality HRT, you're lifting three times a week, walking daily, eating 120 plus grams of protein, you sleep reasonably well, and yet your DEXA scan shows dropping bone density, your muscle mass isn't improving no matter what you do, you can't see any definition and you're feeling like you're stuck there. Maybe you got labs and they showed IGF-1 was low. Effectively, you're doing all the right lifestyle things, and this is where you're being told just exercise more, lift heavier is frankly insulting because it's not about that. So we'd still, of course, check your thyroid and your cortisol, your micronutrients, etc. Your hormone balance, of course. But if those were reasonable, I would start thinking about growth hormone signaling, and I would suggest you get an IGF-1 test. And in this case, if it was low, a carefully dosed CJC1295 and Impermerolin program taken at night can raise IGF-1 modestly to deepen sleep and improve recovery and build that muscle and bone strength back. It doesn't push growth hormone into bodybuilder territory, you will not get bulky, but it reminds your pituitary how to behave more like it did when it was like 30. So, again, we're not overriding the system, we're nudging it back towards homeostasis and useful function. Number two, I had COVID. I did all the protocols, and I still feel inflamed. Let's say you're maybe 45. You're on HRT, you're living it up with our pet or beyond 40s, lifestyle modifications, doing all the right things. Then COVID happens. Maybe once, maybe twice. Months later, you still have gut issues, maybe bloating or sensitivity, IBS-like symptoms, even. You have joint pain or tendon pain that lingers. You get frequent viruses or illness, and you have brain fog and fatigue. Standard labs, they don't show anything. You look fine, according to your doctor, maybe a little bit of nonspecific inflammation. But if we were to run deeper labs, we might see elevated PTO or delectin 3, which would indicate neuroinflammation and systemic fibrosis risk, even if you feel not that bad. So here, some basics come first diet, gut repair, sleep, stress, micronutrients. But when you plateau, this is where I might think of layering BPC157 orally for the gut, injected for more systemic tissue repair. It supports mucosal and gut healing, so the mucosa is the lining of the gut, and it has broadband benefits for other tissues and reducing inflammation. I would also definitely go with thymus analpha-1 to help rebalance your immune system to fight off any lingering infection that may still be there in the background. Often people are harboring things they don't even know or draining their energy. So thymus and alpha 1 for antiviral defense and to shift away from a chronic, misdirected, inflammatory picture or that TH1, TH2 balance I was talking about before. Thymus and beta 4 or TB500 encourages proper healing as well, rather than scar tissue in the lungs, heart, joints, possibly the brain. Again, none of this replaces treating the mold or heavy metals or chronic infections if they're present. Peptides or adjunct therapy is part of the signaling support that can help support your system to respond in an effective way. Situation number three: my brain worries me more than my waistline. The third scenario is becoming more and more common. Say you're in your late 40s or 50s, even your 60s, you're high functioning, but you notice word-finding issues, subtle memory lapses, increased anxiety or low resistance, you may have an ApoE4 gene or a history of dementia in the family. Step one is always get your metabolic health in shape. Glucose, insulin, blood pressure, use HRT appropriately and optimize estrogen, progesterone, testosterone, DHEA started in the right window or profoundly neuroprotective. And of course, sleep, exercise, cognitive challenges, social connection, those kinds of things. And then on top of that, in a higher risk woman, I might consider GLP1 agonists, actually, not just for weight, blood sugar, etc., but for their ability to reduce systemic and brain inflammation, to improve insulin signaling in the brain and support mitochondrial function there as well. In Alzheimer's trials, they've slowed brain atrophy and improved inflammatory markers, even if cognitive test scores didn't transform rapidly over a year. The data is pretty amazing. And at one point, I was told by somebody in the space, I haven't actually been able to find the evidence for this myself, but someone had said GLP1s were initially discovered as supports for reversing Alzheimer's, which is a very bold claim. I was like, what? So they were discovered in Alzheimer's clinical trials, but then the trials had to be stopped because the patients lost too much weight. And then obviously, as someone smart was like, oh, we can leverage these things as weight loss drugs. But initially, it seems like they have had, for a very long time, anyway, like a really profound effect on brain health. I would also consider braid direct a peptides like Clang and CMAX. Has nasal sprays or injectable to support attention, calm neuroinflammation, and assist recovery. Okay, lastly, let's talk access, regulatory, safety sourcing, and why Instagram peptides worry me. This is the very unsexy part of all of this discussion. I'm sorry, it's a bummer, but we gotta go there. So let me just give you like a 10,000-foot view of why it's so tricky with peptides. When peptides first entered clinical practice, they were typically prescribed by a few clinicians who had done extra training in regenerative or functional medicine. And they were sourced from compounding pharmacies that are inspected, regulated, and required to test products for purity, potency, sterility, and contaminants. The pharmacy, in that case, stands behind the product. If the clinician prescribes something and something is wrong with that product, they can go back to the regulated entity and ask what the heck happened here. That's very different from what is now happening. Anyone can go online now and buy research grade peptides from a website that says in bold letters on each vial, not for human use, for research only. Many of these companies will provide a certificate of analysis, but they're not held to the same standards as compounding pharmacies. So trace levels of contaminants, including heavy metals or bacterial endotoxins, can be present while the certificate of analysis or COA looks fine. Third-party testing to a very high standard is essential. So, like HPLC or Mass SPEC. There is no meaningful oversight for sterility, storage, handling, or contamination from these kinds of sources. And many companies are now producing cheap or impure, not safe peptides out of typically China and India are flooding the market under the guise of shops operating out of North America. In my opinion, those are not of high enough purity to be introduced into the body by injection. You don't have any filter, you don't have a liver to filter up the toxins when you just put it straight into your bloodstream. Difference between eating something and injecting it into your body. So there are very few companies I trust, actually, in North America, and they make their products in ISO certified facilities to the highest purity standards. I have spoken to the company owners, I have seen the actual data, they do independent third-party testing for all of the things, but they are very hard to come by. So what happened in the broader picture with peptides is that they really started to gain traction in the 2010s and 2020s. And because of that, the FDA got suspicious, and rightfully so. They then cracked down even on peptide compounding by official legit pharmacies in 2023 and 2024, which was terrible for the many clinicians who rely on these things, their patients rely on these things to get well. People who are very, very sick. Unfortunately, many of these clinics and clinicians have gone underground and have turned to other suppliers for peptides or have their own peptides made privately. Now it seems that the tide is changing again on regulatory, as RFK Jr. announced on a podcast just about a month ago at the time of this recording. It would have been in March 2026, that some of the most popular peptides would be reclassified so that they can be compounded again. And just yesterday, which was April 15th, 2026, the official announcement was made by the FDA that they have gone ahead and done this. Move from category two into category one, which means they can be compounded again, but they're underwatch. They're not officially regulated drugs yet. It's a major win. We still have a long way to go, and it'll be a long time till we see regulatory open up so we can access peptides more easily and freely if that happens, but still great news. Big picture, unfortunately, related to this in rapidly evolving scientific domains like peptide research. Regulatory frameworks trail behind innovation. We see this a lot in medical schools, which tend to be 14 to 23 years behind the research. This lag is not a failure of oversight. It's the reality of regulatory systems. So scientific discovery moves iteratively and globally while regulatory bodies must validate safety, standardization, and long-term implications before issuing formal guidance. Recent commentary from the FDA and Health Canada's ongoing evaluations of compounded and research use peptides reflects this dynamic environment. And it's super frustrating because clinically they've been used for decades by many top-tier functional medicine physicians with stunning success to help people when standard approaches just can't. But here we are. Anyway, in this crazy environment where peptides are certainly still in a weird gray area, clinicians and research professionals are not merely participants. Unfortunately, we have to act as gatekeepers. Both so people don't buy bad, contaminated, or dangerous products, and so they use peptides safely and correctly. We don't want them hurting themselves or wasting their money. And it sucks. It sucks to be in this position, to be legally exposed. And I just frankly hate gatekeeping this stuff. Because the fact is that being in this space comes with pretty considerable exposure to liability in terms of getting shut down. Both myself, ourselves, and our suppliers, the legit companies that are producing really good product. And this is why I just can't announce publicly go to this website, they're great, or here's my supplier, because it's a scary space to be in that way. And I'm just gonna bluntly and unabashedly say that Big Pharma is not supportive of natural medicine of peptides because they're not making money on them yet. This means they lose money on drugs that sick people would be taking. And this is not me being a conspiracy theorist. I do have a couple of very close insider friends in the industry. One is very high up in a compounding pharmacy, and another was on Health Canada's drug regulatory board at the top, top, top of the, you know, pyramid. They have warned me in no uncertain terms that I should be very careful about promoting peptides, that I should scrub the internet of my home address, that I should operate under a pseudonym. Like the list goes on. It's frightening and it's a sad state of affairs. And the last thing I want is the men in black showing up at my door. So while I will offer this education and this service, it's a bit of a thing to shout it from the rooftops. So there you go. Am I afraid? No, not at the moment, not at the scale I'm working at, but it crosses my mind as we grow as a better beyond 40 formula is exploding in popularity. So we'll see. And I gotta say, sorry, I'm on my soapbox a little bit, but to me, the risk is worth it. Like I can protect myself legally mostly, I think. But if I can get people better and support them to access these things to be in less pain and less suffering, less anguish, then goddammit, I will. And I may have to go underground at some point, but that's a risk that I take. And I do have the advantage that many providers don't have, in that I don't have a regulatory board breathing down my neck. A doctor cannot talk to you about most of these peptides. That's why I get referrals from GPs and from experts and functional medicine providers and naturopaths. Like, can you work with this person? Yes, I can. Because if they cannot, they will get shut down. Physios, too, all of these, all these people who have bored. So I feel like given what I've seen and what I know about how helpful they can be, it is my duty to leverage that knowledge to help people, but I do have to be careful and I cannot help everybody with this. All this is to say, peptides themselves are not unsafe. The danger generally comes from poor quality manufacturing or in some cases misuse. Regulatory is hard and sticky and sucky, and until they're more freely available, yeah, it's a pain and it's it sucks. It's important to never take cheap peptides or take them from an unknown source, as many are impure and can cause side effects or tissue damage or permanent damage. I get asked almost daily whether new supplier X, Y, or Z is okay. And honestly, my blanket answer is no, don't do it. If you're really convinced that this is a good company, that their stuff is made, you know, blah blah blah. We could talk about it, but so here's some simple guidance. If you're going to explore peptides, do it with a clinician who understands and has training in how to administer them. Not something Shandy on TikTok. Beware of any spa or clinic or supplements you see online or peptide program that doesn't start with your labs, your history, your goals, your health status. Peptides are not here to replace your foundations. If someone is selling you peptides instead of talking about your sleep, your nutrition, your blood work, hormone balance, etc., that is a huge red flag. Run the other direction. So should you consider peptides? Good question. Let's land all of this with a very practical framework. If you're wondering about whether peptides belong in your life, please ask yourself three simple questions. One, are my foundations truly in place? Am I sleeping reasonably well most nights? Am I eating enough protein and whole foods, veggies, fiber, healthy fats, and not under eating or overeating? Am I moving, especially lifting something heavier than my handbag or my eight-pound dumbbells? Have I done some work on stress and if need be trauma? And so on. Number two, have I had a critical look at my hormones and basic labs with someone who understands them and can help me optimize? And especially if you're dealing with perimenopause or menopause or menopause issues, this is extra important. Along with that, are my thyroid iron B12, vitamin D, and blood sugar at least reasonably addressed? Number three, what specific problem am I hoping that peptides can help me with? Are we looking at gut repair and joint healing or immune resilience and autoimmunity? Is it about muscle or bone or wound healing, surgical recovery? Is it for brain fog or neuroinflammation? Are you just generally interested in longevity? If you can articulate those things clearly and your base is reasonably solid, then peptides can be incredibly elegant tools potentially. So, foundations first, hormones next, peptides as precision tools. And one last bit here before I say goodbye. If you're interested, I just wanted to offer you a few resources to learn from and a little bit of history on peptides because it's kind of cool. So the best of the best, in my humble opinion, in this space in North America, are not limited to, but I'm just gonna give you three of my personal favorite humans to learn from. They are absolutely brilliant, each of them in different but overlapping ways. They have different kinds of approaches and personalities. Number one, Dr. Elizabeth Yurth, my all-time favorite hero. I absolutely adore this woman. She offers a lot of free content. She heads the Boulder Longevity Institute in Colorado. They have a free group where she does a QA every month. She actually answers your questions. She's got a whole online learning portal with a little bit on peptides, but just a generally awesome place to start. Dr. William Seeds. He is kind of like one of the godfather OGs in the peptides space. He's actually written the book on peptides. There's a little manual he has. His protocols are very different from some of the other ones that I have been learning about from other experts. But Seeds is amazing. He's very scientific, very nerdy, also wears a really cute bow tie all the time. It's quite funny. And then Dr. Kent Holtworf, also incredible science brain, super nerdy. They're all really nerdy. But he, Kent Holtworf, is absolutely awesome. And he actually has his own peptide company. They do oral formulations called integrative peptides. You have to be a provider to order from them, though. So I can order those for you if those are of interest. Definitely a source I trust. They really know what they're talking about. There are truly brilliant pioneers. There's others, but just be aware of all the bro science guys out there. Even Andrew Schuberman, I hated his podcast on peptides, frankly. He's a brilliant guy. Just lots of people, they'll go online and then they'll just learn a few bits and then they'll regurgitate them to you. And that's fine, but just beware. If you want to go deeper without investing thousands of dollars in a course, then check out their content. Lastly, I just wanted to offer you a little bit of fun peptide history before I sign off. So I mentioned that peptides were pioneered in Russia by a brilliant Russian scientist during the Cold War who studied them for over 40 years, and that was Dr. Vladimir Kavinson. And he developed an interesting kind of peptide cerium aging as he was studying these things. But he basically posits that changes in gene expression during aging result in decreased protein and peptide production, and therefore failure to replace old damaged proteins. This eventually leads to the breakdown of tissues and the development of diseases. And so he really has fostered this idea, which is very widespread in places like Russia and the Eastern Europe, that peptides are an essential Part like hormones we look at in North America of the aging support system. If you want the full story, I've linked here an interesting little video on the development of peptides in the show notes. We now know his theory of aging held true for many critical peptides, including melatonin and certain hormones, which decline with age. Dr. Cavinson also proposed that the average lifespan can be increased 105 to 110 years by reinvigorating production of certain peptides in the body and therefore slowing the aging process. And he shows this can be achieved by adding peptides back into an aging body. So strong evidence does support these theories to a degree, 105 to 110 years. I'm not so sure about that part. But labs across Europe and recently in the US are seeing pretty incredible effects on aging. And actually, a Russian study of a peptide called epitelon, another one I like, I didn't get to today, demonstrated an average of five to ten years of lifespan extension in otherwise healthy 75 to 80-year-olds, with some of them living up to 10 years longer. That's pretty cool. Epitelon, bioregulator, affects a lot of genes towards a more useful expression profile. Alright, friends, that's a wrap on our three-part peptide series. I hope you enjoyed it. If there was any topics or things you wanted me to expand on, please let me know. I love hearing from you. We covered a lot. We looked at what peptides are, how they work, the specific ones and why, some real-world scenarios from my practice, and the honest truth about sourcing and safety. I hope this has given you clarity and a much better sense of whether peptides belong in your toolkit or not, and how to approach that, if at all. And odds always, none of this replaces your foundations or your home replacement if that's where you are in life. And none of this replaces the advice of your medical provider. But I will say if you've done the work and you're still super stuck, now you know there's another layer that's potentially worth exploring. If this episode helped you feel seen or supported and you want to go deeper, you're ready for clarity, support, and a roadmap to feel truly better beyond 40, visit my website, drmarypines.com and explore my Better Beyond 40 program. Be sure to join my newsletter for weekly guidance, my free community group on school. That's S-K-O-O-L.com, also called the Better Beyond 40 formula, because in it I offer tips and tricks to keep you informed of the latest. You can also follow me on Instagram at Dr. Mary Pines for day-to-day inspo, and I'm working real hard on getting my YouTube channel going as a prime source of awesome info on peptides and more for all y'all. You are not alone in this journey. We are in it together, and you deserve to feel incredible. We'll talk to you soon. Thanks for listening.