What are peptides really, and why is most of what you hear about them inaccurate?
In the last two years, peptides they have become the hot topic in wellness medicine. You can find them in podcasts by longevity, in the reels of biohacking, in the protocols of famous athletes. They promise to burn fat without moving, repair tendons in two weeks, sleep like a child, slow down aging. And the public, understandably, is confused: are they a revolution or just another fad?
The most honest answer, which you rarely find in marketing, is: neither one nor the other. Peptides are a real and interesting biological class, with enormous theoretical potential. But there is a gap between theoretical potential and “it works today, on you” that marketing pretends not to see.
This week we are focusing precisely on that distance.
Technically, peptides are short chains of amino acids linked together by peptide bonds.
One peptide is a amino acid chain held together by chemical bonds called, precisely, peptide bonds. When the chain is short, conventionally up to 50 or 100 amino acids, we call it a peptide. When it's longer, we call it a protein. The difference is a convention, not a chemical revolution: from a molecular point of view, Peptides and proteins belong to the same family.
Like this pearl necklace: Each pearl represents an amino acid. If the chain contains up to 100 beads, it is called a peptide; if the chain is made up of more than 100 beads, it is called a protein. There is a peptide bond between each bead.
This is the first important point to clarify, because it helps dismantle the idea that peptides are something exotic. They are not. Your body produces them all the time.
The’insulin, which regulates blood sugar, is a peptide. The glucagon, which does the opposite, is a peptide. The’oxytocin is a peptide involved in affective bonding and childbirth. Endorphins Peptides are what give you a sense of well-being after a run. leptin, who tells you to stop eating, and the ghrelin, which tells you to do it, are peptides. Even the GLP-1, the molecule behind Ozempic and Mounjaro that has revolutionized weight loss, is a peptide.
An important clarification: all of these are peptide hormones. Structurally, they are peptides in every respect, but functionally, they behave like hormones: that is, molecules that produce a direct effect on the body, regardless of what is
This happens in all situations. Insulin lowers blood sugar even if you were fasting. Oxytocin has precise effects even if you are not in love. Pharmacological GLP-1 reduces appetite even if you didn't have a “satiety signal” to amplify.
Keep this distinction in mind, Because below we will see that most of the wellness marketing peptides work very differently. They are structurally peptides, but they are not hormones: they do not produce a direct effect. They work in another mode, and that is the source of much of the confusion.
So when you hear someone say,“Peptides are the future of medicine“ the phrase is true in a trivial sense: I already am, and have been for decades, in the form of life-saving approved medications every day. The problem is that marketing uses the same word, “peptides,” to refer to very, very different things.
The real point: peptides amplify a signal, they don't create it
Let's pick up where we left off. We've seen that many endogenous peptides (insulin, GLP-1, oxytocin) are actually hormones and produce a direct effect. Most peptides that you find sold as “tonics,” “anti-aging” agents, or “fat-burners” work differently. This is probably the most important idea in this entire newsletter, so I'll take a moment to explain it thoroughly.
Drugs that have a direct effect on the body work predictably: you take the molecule, the molecule does its thing, and you feel the result. amphetamine they still stimulate you, even if you were previously unwilling or relaxed. The T3 it speeds up your metabolism anyway, even if your thyroid was working well. The Exogenous testosterone It boosts testosterone anyway, even if your body was producing enough.
Most peptides advertised today That's not how it works.. They don't create an effect from scratch. They simply amplify a signal that your body is already emitting.
If you train, your body sends a signal for muscle growth, and a peptide can amplify this signal. If you are in a caloric deficit, your body already has a signal to lose weight, and a peptide like tesamorelina can amplify it and accelerate the process. If you are injured, healing processes are already active, and a regenerative peptide can speed them up. If you sleep, sleep phases are already present, and some molecules can make them deeper.
But if there's no baseline signal, there's nothing to amplify. Injecting yourself with a peptide thinking you'll lose weight without changing your diet, or gain muscle without going to the gym, It's like turning up the volume on a radio that's off. Peptide marketing sells exactly this illusion, and it's the main reason why most people are disappointed: they spend a ton of money expecting miracles, and in many cases, they feel nothing.
Stated positively: many peptides they reward those who are already working. If you train consistently, eat sensibly, and respect your circadian rhythm, then a well-chosen peptide can make weight loss a little faster and easier, recovery a little more complete, and adaptation a little more effective. It's an extra gear for an already running machine. But if the machine is stopped, no gear will help.
A concrete example: tesamorelina versus exogenous GH
To truly understand the difference between “amplify” and “directly inject,” let's take a real-world case: the Tesamorelin.
Tesamorelin is one of the few FDA-approved peptides, indicated for lipodystrophy (increased visceral fat) associated with HIV. It is a GHRH analog, meaning it mimics the hormone that your hypothalamus produces to tell the pituitary gland to release growth hormone (GH), our body's most potent lipolytic (or “fat-burning”) agent. When you inject it, tesamorelin binds to pituitary gland receptors and stimulates a larger pulse of GH than you would have naturally.
Crucial point: this pulsation remains within the physiological range. Your body continues to regulate itself normally. Insulin, for example, is an antagonist of GH: if you eat carbohydrates 5 minutes after the injection, insulin rises, GH drops, and the effect is attenuated: in other words, you have spent money and injected a molecule for nothing.
If you instead inject Exogenous GH, ..., the actual hormone, you completely bypass this mechanism. You reach supra-physiological levels, independent of the body's negative feedback: no matter how many carbohydrates you eat or what else you do, you will still have high GH levels. The effect is more powerful, more direct, more predictable, but also much riskier, and far beyond what your organism had ever “predicted.”.
This is the difference between amplifying a signal and injecting it directly. It's why peptides are never a shortcut to skipping lifestyle changes: they are, at best, an amplifier of something you're already doing.
The theoretical potential is truly enormous
I want to be honest here and balance the discussion, because there's a risk of coming across as a total skeptic. I'm not. On paper, some of these peptides are among the most fascinating things molecular biology has ever studied.
Think about MOTS-c: It is a peptide encoded not by nuclear DNA, but by mitochondrial DNA. It is endogenous—your body produces it—and acts as a bridge between the cells“ energy powerhouses and systemic metabolism. It mimics some of the effects of physical exercise by activating the same biochemical pathways involved in fat metabolism and AMPK; this is why it is also marketed as ”exercise in a bottle.” And in animal models, higher levels of MOTS-c appear to correlate with greater longevity. Studies in humans have shown that plasma levels of MOTS-c decline by 10–20% with aging. A molecule that restores a biological parameter that declines with age—the idea is fascinating.
Think about the’Epitalona small tetrapeptide that, in the studies of the Russian group of Khavinson, induces the expression of hTERT, the enzyme that reconstructs telomeres. In simple terms: telomeres are the “protective caps” at the ends of our chromosomes, which shorten with each cell division and function as a sort of biological clock. When they are completely used up, the cell stops dividing and undergoes death, and this progressive shortening is considered one of the mechanisms underlying aging. Lengthening them, at least theoretically, would mean rewinding part of that clock., meaning to extend life and slow down aging.
Think about GHK-Cu, the peptide of youth and beauty: a copper-bound tripeptide, naturally present in our body, whose plasma levels decrease with age. Its most studied and established application is on the skin: it stimulates the production of collagen and elastin (the two structural proteins that give tone, support, and elasticity) promotes fibroblast regeneration, accelerates wound healing, and shows antioxidant and anti-inflammatory effects. For this reason, it has been found for decades in high-end dermocosmetic serums and creams. But its most intriguing aspect is another: studies from the Broad Institute have shown that it modulates the expression of over 4000 human genesa statistic that marketing loves to cite as proof that it “takes you back to youth.” (Spoiler: “modulate” doesn't mean “activate toward youth,” but the statistic is real and fascinating.)
All of this is extraordinary on paper. The problem is that “on paper” and “in practice, today, on a human being” are two very different places.
The current state of evidence, today
Where marketing almost always stumbles is here: the The available scientific literature is almost entirely preclinical..
Specifically, it means that most of what we know comes from:
- Cell culture studies in the laboratory (in vitro);
- studies on mice, rats, rabbits, occasionally dogs or monkeys (animal models);
- mechanistic hypotheses deduced from these two categories.
Human clinical trials, the well-conducted, randomized, double-blind ones with large sample sizes, are rare, and in most cases absent altogether. For many of the most hyped peptides, there isn't a single decent human clinical trial. For others, there are one or two, on a small number of participants, retrospective.
Furthermore, essential data is missing to use them judiciously: standardized dosages, optimal treatment duration, long-term safety profiles, and interactions. Stated more directly: we don't know what dose, how often, and for how long they should be taken to achieve the maximum theoretical benefit. We don't know the interactions with other drugs or supplements, we don't know the long-term risks, we don't even know what happens in specific populations: pregnant women, the elderly, people with pre-existing conditions.
In addition to this, there is a structural problem with the market: most of these peptides are not legally approved for human use, and therefore do not go through regular pharmaceutical channels. They are found on independent websites that legally protect themselves by selling the product as “for research purposes only” and “not for human consumption.” In practice, this means there's no serious control over quality, purity, contamination, or actual dosage. The vial you receive might contain the declared molecule in the declared quantity. Or the right molecule at a completely different concentration. Or something else entirely. Impurities also matter: they can be responsible for side effects, skin rashes, allergic or pseudo-allergic reactions completely independent of the peptide itself.
So when a peptide is sold to you as “revolutionary, safe, effective,” the most honest translation is: “interesting in theory, plausible mechanistically, but in practice, today, we know almost nothing about how it actually behaves in you.”. In the most optimistic scenario, it works as theory suggests. In an intermediate scenario, you don't feel anything at all and have just wasted money. In the worst-case scenario, you end up with side effects and none of the benefits.
Where does the average effect really fit in?
It must be said immediately: There is a small number of peptides that, even today, seem to work in a fairly predictable and consistent manner. They are a minority compared to the vast number of products sold on independent sites, but they exist, and the anecdotes collected from users converge quite neatly. As always, there are exceptions in both directions: people for whom the effect is more pronounced than expected, and people for whom it falls short of expectations. But the underlying signal is recognizable.
One thing worth stating clearly, because you'll hardly find it in a popular science article. Having frequented communities that truly discuss peptides for a long time (forums, private groups, coaching, Reddit, dedicated Facebook groups, industry Instagram pages, where people share their real-world experiences), the impression is quite clear: in most cases, the actual effect falls between “I absolutely heard nothing.” and “Yes, I sensed something, but much less than I expected.”. The cases where the effect truly matches the theory or even surpasses it are a minority. Cases of only side effects, with no benefit, are also a minority but they exist. In short, the distribution is not what marketing leads one to imagine.
It should be said that many of these disappointments do not necessarily depend on the molecule itself. Often, incorrect usage methods, products of uncertain quality, randomly chosen dosages, or a basic lifestyle that isn't producing any signals to amplify come into play. Or The amplification is indeed there, but it's so marginal that it's imperceptible in the short and medium term. And if the effect is so subtle, even in the long term it becomes almost impossible to say how much any improvement is due to the peptide, how much to the new lifestyle, how much to the placebo, and how much to the simple fact that all these things have happened together. When an experimental starting molecule is used in an equally uncertain context, the final result is inevitably difficult to interpret.
Obviously, we need to distinguish based on the type of peptide: let's take I as an example GLP-1. As we were saying, they are peptide hormones and they produce a direct effect: they act on satiety centers and concretely reduce hunger. People who have lived for years with that constant background noise of hunger and food cravings can finally turn it off and live freely: here the theoretical and practical effect truly coincide, apart from the exceptions that always exist in medicine. For most other wellness peptides, however, the picture is much more nuanced.
Why perception often surpasses reality
One last element worth mentioning is the role of perception. The placebo effect here is particularly strong, for two additional reasons compared to the usual. First: you pay for it, often a lot. When you invest non-trivial amounts of money in a product, there's a natural psychological resistance to concluding that it's not working: the brain looks for signals compatible with the investment. Second: there's the gesture of the injection itself, which carries its own almost ritualistic aura, something “more serious” and “medical” than a pill, and this amplifies the expectation of a visible result.
In addition to this, there is a curious but widespread logical fallacy. Many peptides are prohibited by WADA, the World Anti-Doping Agency. For some of the public, this is read as proof of effectiveness: “If they banned them, then it really works, otherwise they wouldn't have bothered.”. It's a line of reasoning that sounds logical, but it's tricky: WADA includes many substances on its lists that are “not approved” for medical use, even if only because they are potentially doping substances on paper, and regardless of whether there is real clinical evidence of their efficacy. Being on WADA's blacklist says something about theoretical potential of the molecule, not on its Proven efficacy in humans.
The parallel with supplements
I find the most useful way to understand the situation is to compare it to that of certain supplements many of us are familiar with.
Lo zinc It's a perfect example. It's an essential enzyme cofactor for testosterone production, thyroid function, the immune system, and hundreds of other processes. It's a fundamental nutrient for male hormonal health.
What does it mean in practice?
- If you are deficient in zinc, supplementing it really helps. You correct a real deficit, and biological parameters improve measurably.
- If your levels are normal, supplementing with zinc won't push your testosterone to supra-physiological levels. You won't become Superman. You're simply ensuring the machine has enough fuel to do what it was already doing.
The peptides On paper, they function similarly. They can optimize, they can amplify, they can give a small advantage if the system is already in motion. But they don't replace your lifestyle and they do not produce miraculous transformations in people without a biological signal to amplify.
In summary
Peptides are a real biological class, important and with extraordinary theoretical potential. Many of them could one day become frontline drugs for problems we currently manage poorly: aging, sarcopenia, chronic injuries, metabolic and degenerative diseases.
But today, in 2026, We are still predominantly in the promise phase, not the proof phase. The distance between “the mechanism is elegant” and “the clinical study shows it works” is precisely the distance that separates science from marketing.
The takeaway message is simple: Peptides are neither the absolute evil nor the revolution. I am signal amplifiers, and amplifying zero always gives zero. Lifestyle: training, nutrition, circadian rhythm, stress management, and so on remains the foundation. If that foundation is there, some well-chosen, high-quality peptide might add something. If it's not there, no peptide in the world will build it for you.
I would like to know what you think. Had you heard about peptides before?
Did you have the idea that they were something completely different from what I described here?
Tell me in the comments, I'm curious to read concrete experiences, doubts, or even just immediate opinions.
Thank you for your time and willingness to delve deeper.
Oliver
English 
Italian 
German 
Good morning, my orthopedic surgeon, to alleviate the pain in my poor shoulders (after more than 40 years of working out), recommended I use BPC-157 + TB-500 peptides. However, after reading your article, I have doubts about the product's quality. Since I can't buy them from an Italian pharmacy, but rather from an online site (Nordic), can I trust it? I'd like to try them, but I don't know any other way to buy them. However, after reading your article, my curiosity is very high due to the innumerable benefits they could bring. Thank you.
BPC-157 and TB-500 are the two most well-known peptides in the peptide world. Together, they are often called the “Wolverine Stack.” The reference to the Marvel character who regenerates instantly is intentional, and it's exactly what the marketing promises: faster healing.
They are also two of the few peptides that I personally consider among the most “valuable.” Not for the scientific evidence, which remains rather scarce, but for the enormous amount of testimonials and the fact that they are among the most used (and abused) peptides online. When a molecule has been tried by so many people and the anecdotes continue to converge, there is probably something real, even if science hasn't quite grasped it yet.
Regarding when they are used: typical indications include tendinitis and tendinopathy, muscle injuries, joint and ligament problems, post-injury or post-surgical recovery, and generally chronic overuse pain; precisely the type of condition that can arise after many years of intense activity. They are most often used in connective tissue that is “slow to heal.”.
Regarding the results, however, you should expect a very varied picture. There are those who report pain present for months or years, on which nothing else had worked, resolved in a short time, minor ailments vanished, clearly better recoveries. There are those who feel absolutely nothing. And there are those who perceive something modest, but only after using the product consistently for several weeks in a row. There is no way of knowing in advance which group you will end up in.
One last thought on your orthopedic doctor's advice. If he suggested them to you without having an affiliate code or financial interest in the site from which you are supposed to buy them, meaning without profiting anything from recommending them, it is reasonable to think that he has seen good results with these peptides in his patients. Not with everyone, because as I said, the response is individual, but enough to consider them a sensible option to suggest to you.
Interesting, thank you. I had heard of it, but not so clearly.
I had only heard of them in the context of cosmetics. I'm 53 years old, and looking for an anti-aging face cream, it seems that the ’key“ ingredients have been collagen and, precisely, peptides for a while now.
I didn't know exactly what they were anyway.
Thank you for your insight
Thank you 🙏 for the very valuable information. To get results, one must always work from all angles.
Thank you for the information. I knew almost nothing about this topic!
Thank you, all very interesting… I'd like to delve deeper into both emotional eating and nerves in general… what do they depend on, is there a correlation,… (My husband, hypertensive, but still a big worker in his vineyards…
Hello, I'm doing a lot of research because there are certificates of resolution for problems personally experienced by some patients.
I've been in touch lately with Dr. F. B. [longevity medicine], who has achieved results regarding his shoulder,
deputy for intervention, and not only that, but at the same time, some hip pain was eliminated
Would you recommend TB500 and BPC-157 for my carpal tunnel pain?.
That's all I have to say
For now, I'm doing acupuncture and I don't want to combine the two treatments. I'm Dr. Tomasi's patient, therefore, the doctor knows everything about me. Thanks for this space where I can express myself.
I'm pasting a response I gave to another question about BPC-157 and TB-500 below, as it contains much of what I would tell you:
“BPC-157 and TB-500 are the two best-known peptides in the world of peptides. Together, they are often referred to as the “Wolverine Stack.” The reference to the Marvel character who regenerates instantly is intentional, and that is exactly what the marketing promises: faster healing.”.
They are also two of the few peptides that I personally consider among the most “valuable.” Not for the scientific evidence, which remains rather scarce, but for the enormous amount of testimonials and the fact that they are among the most used (and abused) peptides online. When a molecule has been tried by so many people and the anecdotes continue to converge, there is probably something real, even if science hasn't quite grasped it yet.
Regarding when they are used: typical indications include tendinitis and tendinopathy, muscle injuries, joint and ligament problems, post-injury or post-surgical recovery, and generally chronic overuse pain; precisely the type of condition that can arise after many years of intense activity. They are most often used in connective tissue that is “slow to heal.”.
Regarding the results, however, you should expect a very varied picture. There are those who report pain present for months or years, on which nothing else had worked, resolved in a short time, minor ailments vanished, clearly better recoveries. There are those who feel absolutely nothing. And there are those who perceive something modest, but only after using the product consistently for several weeks in a row. There is no way of knowing in advance which group you will end up in.
One final thought on your orthopedist’s recommendation. If he suggested them to you without having an affiliate code or a financial interest in the website where you’d be purchasing them—that is, without standing to gain anything by recommending them—it’s reasonable to assume that he’s seen good results with these peptides in his patients. Not with everyone—because, as I said, the response varies from person to person—but enough to consider them a sensible option to suggest to you.”
In summary: they are two of the peptides with the most evidence in the world of recovery. The typical indications are tendon pain, joint pain, and overuse injuries, but individual responses are highly variable and unpredictable.
Regarding the choice not to overlap acupuncture and peptides, however, I agree with you: pursuing one path at a time is almost always the best way to understand what really works.
But there’s something else I especially wanted to tell you: if you and the other readers would like, I’d be happy to devote an entire article to BPC-157 and TB-500. These are peptides that, for the people they work for, make a real difference and deserve serious examination: when they’re used, what results are reported in testimonials, what we know, and what we don’t.
The only thing I want to be honest about from the start is this: it's really difficult to know in advance if they will work on a specific person, and you always have to account for a portion of the placebo effect. But, and I say this without irony, as long as the pain goes away and the person feels better, whether it's thanks to the peptide or partly the placebo matters to a certain extent. The relief remains real in both cases.
Thank you again for writing, and please let me know if the article would be of interest to you.
First of all, thank you! I read everything with great interest, and I finally understand it a little better! I’d heard about all this before, but I really hadn’t understood what it was all about, and I have to say my initial reaction was negative—it’s scary to inject something into your body without knowing the exact dosages or side effects. I’ve heard about serious intestinal problems, blindness, and U.S. class-action lawsuits against some of the giants that produce these drugs! Terrifying! But your clarity and precision have helped me put everything into context, and perhaps by waiting for science to continue its research, we’ll be able to reap real and safe benefits. But above all, what you highlighted is extremely interesting and fundamental regarding the starting point that must be: quality of life, dietary changes, exercise, and alignment with the body’s circadian rhythms. Things that I’ve learned to
Practice as Dr. E does—and as you do! This is the true message that, along with the excitement for this revolution, should always be conveyed—something I don’t hear very often! I was hoping you’d address this, and as always, I found clarity and intellectual honesty! Thank you again for all your work—it truly is a beacon in the night! Warm regards! And thank you always!
What a wonderful message, thank you so much. Knowing that the article helped you organize such a confusing topic is exactly why I write these newsletters.
I'm not returning the compliment about intellectual honesty because I recognize it, first and foremost, in readers like you who engage thoughtfully, not looking for shortcuts, but genuinely wanting to understand. That fear of injecting something without knowing the dosage and risks wasn't exaggerated; it was sound common sense. The serious stories you've heard almost always stem precisely from skipping the knowledge part in pursuit of a promise.
But the point you’ve made is the one that matters most of all: no molecule functions without the foundation. Sleep, nutrition, exercise, and respect for the body’s rhythms—that is the true medicine, and the only one we can practice right now, without waiting for any studies. Everything else comes later—if at all—as a way to enhance a foundation that’s already been laid.
Science will move forward, and one day we will have safer tools. In the meantime, we will continue to tell them with the same honesty. Kind regards, and thank you again.
Very clear and comprehensive.
A thousand thanks!
Thank you Oliver
I don't know much about the topic, but it was interesting, also because of the clarity and honesty.
Thank you so much; I, too, value intellectual honesty above all else.
I don't know much about the topic, and it's very interesting, and I intend to delve deeper into it.
I'm glad to hear that: I plan to explore this topic further in future articles and to devote entire newsletters to individual peptides and categories. Please let me know if there are any specific peptides that interest you.
Very well written and clear—thanks, Oliver. Now I know more both about the topic and regarding “real, documented scientific results,” which don’t exist yet. In the past few days, I saw a report on RAI 3 about peptides and their expensive promises: that was well done, too. Thank you for helping us understand and distinguish objective data from “nonsense.” In this sea of often-misleading information, a layperson has to navigate by sight.
Thank you very much, I appreciate intellectual honesty above all else in these cases and I'm glad you enjoyed the article! :)
Bravo Oliver and thank you!
I'm glad you liked it 😊
Thank you Oliver, you are always thorough, precise, and very professional. I read you with pleasure because it's an inspiration to learn, understand, and be able to choose. Thank you.
Thank you so much for your comment😊
Very interesting and useful, and above all it opens our eyes to marketing. Thank you 🙏
Thank you for the comment!
I am forwarding you a message I sent to a previous comment:
“I’d like to add a thought, because the idea that “they’re only talking about it to make a sale” deserves some clarification. In reality, those who talk about peptides can be broadly divided into three groups. There are those who talk about them purely to make money, and in that case, the marketing is exactly what you’ve seen. There are those who talk about them both for financial gain and because they’ve actually seen positive effects on themselves or on some of their clients; they aren’t necessarily acting in bad faith, they simply have a conflict of interest. And then there are those who talk about them because they see real potential: molecules that one day, along with the countless other things researchers are studying today, could help tangibly and drastically improve the quality of life for countless people.”.
Right now, I place myself in the last group, which is why I always try to talk about it as objectively as possible: without praising them to the skies, but also without completely discrediting them. Because while it’s true that we’re only at the beginning of solid evidence today—ahead of the proof—that doesn’t mean it’s all nonsense or that people are injecting themselves with water. As I mentioned in the article, these peptides amplify a signal, and often benefit those who are already leading a healthy lifestyle; others can help with the healing process, but even there, the person’s own commitment is always the foundation.
In short, they do have an effect. It's just that it's often much smaller than marketing makes it out to be; sometimes slightly smaller; and other times quite close to the promises. As long as the user is informed and starts with the right expectations, they can get real benefit from some peptides today, provided they know which ones to use and how, and aren't unlucky enough to buy a fake product.’
Oliver, thank you for the clarity you've presented with so much truth and honesty. I would like it if you could share a typical day of eating. Thank you.
Thank you very much, in these cases I appreciate intellectual honesty more than anything else.
My typical day of eating probably wouldn't be very interesting 😅
I follow Dr. Tomasi, who is very thorough. Congratulations, very well explained...
Thank you very much!
I only knew the word Peptide. Now it's much clearer what they are and what they are for.
Thank you very much for this clear and exhaustive explanation.
Thank you very much for the comment 😊
Thank you Oliver
I wasn't aware of all of that.
Very interesting😊
Thank you, and yes, I also find this field very fascinating! 🙂
Yes, I studied peptides extensively during my undergraduate biology program, but your explanation helps me understand the mechanism better. Thank you
Thank you, I've heard of it and I'm pleased to know them better. I was wondering if there is a peptide for osteoporosis.
Good morning, and thank you for your question—it’s perfect for clarifying an important point.
Yes, there are peptides that work for osteoporosis, but with one major difference compared to the ones we’ve discussed so far: In the United States, there are two FDA-approved anabolic therapies for osteoporosis: abaloparatide (Tymlos in the U.S., Eladynos in Europe) and teriparatide (Forteo in the U.S.; Forsteo in the EU). Both are peptides in every sense of the word; teriparatide is based on parathyroid hormone (PTH 1-34), while abaloparatide is an analog of a related protein (PTHrP).
And here’s the interesting part: these aren’t “for research only” products bought from a foreign website. They are real, prescription-only medications backed by years of clinical trials. Teriparatide was the first anabolic treatment approved for osteoporosis: instead of merely slowing bone loss, it stimulates the formation of new bone, which makes it very different from traditional drugs (bisphosphonates), which work by inhibiting bone resorption. In practice, while most treatments “maintain,” these peptides “rebuild.”.
I am almost a textbook example of what I was saying in the article: peptides have real potential, and when they reach the end of the scientific process (clinical trials, approval, quality control), they become concrete and reliable clinical tools. The difference with BPC-157 or TB-500 isn’t the type of molecule—it’s the stage of development. These two have completed the journey; the others are still on their way.
A couple of clarifications I feel compelled to add, valid for everyone: they are indicated for cases with a high risk of fracture, not for any osteoporosis, and they have some very precise rules for use: for example, cumulative use for more than two years throughout one's life is not recommended. Therefore, they are not something to be taken “lightly,” but must be prescribed and monitored by a specialist (internist, rheumatologist, orthopedist, endocrinologist, etc.; not a general practitioner).
So the short answer is: yes, they do exist, and they’re among the cases where the peptide truly lives up to its promise. But that’s precisely why they’re available only through a doctor and a pharmacy, not from an online site. If this is an issue that concerns you personally, it’s worth discussing it with your doctor.
That's really interesting!! They'll say anything to make a sale. Thanks for explaining it to us.
Thank you very much!
I'll add a reflection because the “they only talk about it to sell” theme deserves a nuance. In reality, those who talk about peptides are roughly divided into three groups. There are those who talk about them purely to profit, and there, the marketing becomes what you've seen. There are those who talk about them both for economic interest and because they have genuinely observed positive effects on themselves or on some clients; they are not necessarily acting in bad faith, they simply have a conflict of interest. And then there are those who talk about them because they see real potential: molecules that one day, along with the thousand other things that research is studying today, could contribute to concretely improving the quality of life for many people.
Right now, I place myself in the last group, which is why I always try to talk about it as objectively as possible: without praising them to the skies, but also without completely discrediting them. Because while it’s true that we’re only at the beginning of solid evidence today—ahead of the proof—that doesn’t mean it’s all nonsense or that people are injecting themselves with water. As I mentioned in the article, these peptides amplify a signal, and often benefit those who are already leading a healthy lifestyle; others can help with the healing process, but even there, the person’s own commitment is always the foundation.
In short, they do have an effect. It's just that it's often much smaller than marketing makes it out to be; other times only a little smaller; and other times still quite close to the promises. As long as the user is informed and starts with the right expectations, they can derive real benefit from some peptides today, provided they know which ones to use and how, and don't have the misfortune of buying a fake product.
That's a very clear article—thanks!
Stefania
Thank you so much for your comment!
Dear Oliver, I always read your articles with great interest; they're written very clearly, thoroughly, but not complicated!!
An in-depth analysis of these BPC-157 and TB-500 peptides would certainly be appreciated.
Regarding osteoporosis, I read your response to ASSUNTA (“abaloparatide (Tymlos in the U.S., Eladynos in Europe) and teriparatide (Forteo in the U.S.; Forteo in the EU). They are both peptides in every sense; teriparatide is based on parathyroid hormone (PTH 1-34), while abaloparatide is an analog of a related protein (PTHrP”), but I didn’t understand whether these were the ones under development or BPC-157 and TB-500.
An in-depth look at osteoporosis—including the use of various bisphosphonates and other therapies, drug interactions, and side effects—would be very interesting, in relation to the peptides mentioned and, where applicable, in connection with TOS therapies—for those who are eligible—not only for those with a history of breast cancer but also for those with endometrial cancer and in cases of ovarian failure.
Good luck with your work, and I look forward to reading your post soon!!