The Peptide Aisle That Does Not Exist. What BPC 157 And Its Neighbours Actually Are, And Why They Will Never Be On Our Shelf.
We promised this article last week, in a single line at the bottom of a piece about growth hormone, and here it is. Research peptides have moved from forums into ordinary gym conversation across the last two years, and almost nobody discussing them has read what the evidence actually is. This is the honest version, including the regulatory position in Australia, the anti doping position, and the reason there is no aisle for this and never will be.
Opening. The promise at the bottom of last week's page
Last Thursday we published a long piece on growth hormone, and at the bottom of it we answered the obvious follow up question in three lines and promised to come back and do it properly.
This is that article.
Marc is thirty one and competes. In the last eighteen months he has been offered research peptides four times. Once by a training partner, once in a message from an account he has never followed, and twice by clinics with good websites and a doctor's name on the homepage. The language was identical every time. Recovery. Tendons. Sleep. Nothing illegal.
He declined all four, because he competes under a code and reads the rules. Most people being offered the same thing have neither of those protections.
So here is the picture in one place, and why a retailer that takes itself seriously has to say no out loud rather than quietly not stocking them.
Section one. What a peptide actually is, and why the word is working so hard
A peptide is a short chain of amino acids. Longer chains are proteins. There is no sharp boundary, and the dividing line is a convention rather than a law of nature.
That single fact is what the whole category rests on.
Collagen peptides are peptides. Whey protein is full of peptides. The casein in your yoghurt is dismantled into peptides in your gut. All of that is food, and nobody has ever needed a disclaimer for it.
The compounds in this article are something else. Synthetic molecules designed to act on specific receptors, injected because digestion would dismantle them, manufactured for laboratory research rather than for people.
So when somebody tells you peptides are natural, or that your body already makes peptides, they are using the breadth of a word to carry something across a line. It is the oldest move in this industry and it works because the first half of the sentence is true.
The useful question is never is it a peptide. It is whether this specific molecule has been approved for human use by a regulator anywhere, and for everything below the answer is no.
Section two. BPC 157, honestly
BPC 157 is a synthetic chain of fifteen amino acids, derived from a sequence in a protein found in human gastric juice. The initials stand for body protection compound, a name chosen by researchers rather than a description of anything demonstrated in people.
The preclinical literature is genuinely interesting and large. Rodent studies report accelerated repair of tendon, ligament, muscle and gut tissue across many injury models, along with effects on blood vessel formation. Read a few and you will understand why people are excited.
Now the three things that rarely accompany the excitement.
The great majority of that work comes from one research group, led by Predrag Sikiric at the University of Zagreb, across decades. That is not an accusation. It is a serious limitation, because independent replication by unrelated groups is how a finding becomes knowledge rather than a hypothesis, and here that replication is thin.
The work is overwhelmingly in animals. A rodent tendon model is a long way from a thirty one year old with a six month patellar problem, and sports medicine is substantially a history of rodent findings that did not carry across.
And the human evidence is close to absent. We have looked, and we have not found a published randomised controlled trial of BPC 157 for tendon, ligament or muscle repair in people. If somebody says one exists, ask for the citation, the journal and the year, and notice what happens next.
So the honest summary is a mechanistically interesting compound with a substantial animal literature, a narrow authorship base, and no human efficacy evidence worth the name. That is a fair description of a research project and a poor description of something to inject.
Section three. The neighbours
BPC 157 is the famous one. It arrives with a group.
TB 500 is a synthetic fragment related to thymosin beta 4, a protein involved in cell movement and tissue repair. Same shape of story. Preclinical interest, no human efficacy evidence of any weight.
Then the growth hormone secretagogues, the family our growth hormone article pointed at. Sermorelin, CJC 1295, ipamorelin, hexarelin and the compounds sold as GHRP 2 and GHRP 6. These act on the pituitary or the ghrelin receptor, and several genuinely do raise growth hormone release. That part is not in dispute.
Which brings us to the most useful study here, and it is about the oral one.
MK 677, also called ibutamoren, is not a peptide at all. It is a small molecule that mimics ghrelin and can be swallowed, which is why it circulates more widely than the injectables. It was studied properly. Nass and colleagues published a randomised trial in the Annals of Internal Medicine in 2008, giving it daily to healthy older adults for two years. Growth hormone and insulin like growth factor one rose and stayed raised. Fat free mass increased.
Then the part that matters. No demonstrated improvement in strength or physical function. Signals in the wrong direction on blood glucose and insulin sensitivity, and an increase in reported fluid retention.
Read that against the 2007 review we covered last week and the pattern is identical. The number moves. Body composition moves a little. The thing the person actually wanted does not follow.
Section four. The two rules that settle it in Australia
Everything above is interesting. The next two paragraphs are decisive.
The first is Australian law. None of these compounds is an approved therapeutic good here, and none appears on the permitted ingredients determination governing what can lawfully go into a listed complementary medicine. Importing, supplying or advertising an unapproved therapeutic good carries real consequences, and the Therapeutic Goods Administration has taken BPC 157 through its scheduling process with a restrictive outcome. We will not quote you a schedule number from memory and you should not accept one from anybody else either. The Poisons Standard is a public document. Look it up before you believe a seller.
The second is the sport rule, and it is broader than almost anyone realises. The World Anti Doping Agency Prohibited List has a class, S0, covering any pharmacological substance not currently approved for human therapeutic use by any government regulatory health authority. Prohibited at all times, in and out of competition. BPC 157 is named there, and the important part is that a compound does not need naming to be caught, because the class covers everything unapproved by definition. The secretagogues sit in S2 alongside the hormone itself.
So for Marc the question was closed before any discussion of evidence. If it is not approved for human use somewhere, it is prohibited for you, and no supplier's reassurance changes a strict liability rule.
Section five. What is actually in the vial
Set the law aside for a moment, because the quality question is the one that worries us most.
These products are sold as research chemicals, labelled for laboratory use and not for human consumption. That phrase is not a safety note. It is a legal device moving responsibility from the seller to you, and it works.
Nobody is auditing those vials. No batch release testing you can inspect, no identity standard applied, no requirement that contents match the label, no accountable manufacturer at the end of the chain.
The closest published evidence on what that market delivers comes from the adjacent class. Van Wagoner and colleagues published an analysis in the Journal of the American Medical Association in 2017 of products sold online as selective androgen receptor modulators. Only a minority contained what the label said. Some held unlisted substances, some held none of the stated compound, and the doses present frequently did not match the label. There is no reason to think an unregulated injectable market behaves better than an unregulated oral one.
And the history is not theoretical. Melanotan products sold online for tanning led to warnings from Australian regulators and to documented harm, including changes to moles, in an unapproved injectable bought by people who believed they knew what they were buying.
Injecting an unidentified compound from an unaccountable source, on the strength of rodent studies, is a different category of decision from choosing a magnesium form.
Section six. What is actually defensible instead
This is the part that gets skipped, and it is the part we owe you. If the problem is a tendon that will not settle, something has to go in that slot.
Load, correctly dosed. Heavy slow resistance remains the most consistently supported approach for building tendon capacity, and we wrote the long version in The Tendon Decade. It is unglamorous, it works, it takes months, and that last part is why people go looking for a vial.
A clinician who assesses rather than guesses. That appointment costs less than a month of research chemicals and is the only item here with a person accountable for the outcome.
The documented inputs. Adequate daily protein. Creatine monohydrate, the best evidenced compound in the aisle. Collagen peptides with vitamin C before connective tissue sessions, which show acute rises in collagen synthesis markers with long term outcomes still unproven, stated exactly that honestly.
Sleep, in the first half of the night, where your own largest growth hormone pulse arrives for nothing.
And time. The real competitor to a peptide is not another product. It is patience, and patience has no sales channel, which is most of the reason this market exists.
Section seven. The mastermind frame
A retailer's values are visible in one place, which is the list of things it decided not to sell.
We could stock a great deal that is legal, profitable and unsupported. Every supplement business can. The gap between what the rules allow and what the evidence justifies is where much of this industry makes its margin, and we have written our position on that gap into our standards, because a position that is not written down is a preference rather than a policy.
The peptide question sits well past that gap. It is not a close call about evidence quality. It is an unapproved pharmaceutical class, bought from unaccountable sellers, prohibited for anybody who competes, and outside the law to supply here. There is no version of it we could sell responsibly, which is why there is no aisle, no quiet back shelf and no knowing conversation at the counter.
Marc already knew. Most of the people being offered this do not, and they are not reckless. They are in pain, or stalled, or afraid of getting older, and somebody arrived with a confident explanation and a vial.
We sell the supplements that support the work. We do not sell the work, and we do not sell the shortcut, because the shortcut in this case is an unidentified liquid and a signature on somebody else's risk.
Frequently asked questions
Are peptides illegal in Australia?
The question needs splitting. Collagen peptides and protein derived peptides are food and are sold openly. The compounds in this article are a different thing, and none is approved for human use here or permitted as a supplement ingredient. Supplying or advertising them as therapeutic goods is unlawful. A seller telling you otherwise is telling you what you want to hear.
My doctor prescribed a peptide. Is that the same thing?
No, and that distinction matters. A prescriber who has examined you, working inside the regulated system with an identified product and accountability for the outcome, is a different situation from a vial bought online. That is a conversation to have with your doctor, including about what evidence supports it in your case. It is not a conversation a retailer should be in the middle of.
But the rodent studies look strong. Does that count for nothing?
It counts as a reason to run human trials, which is exactly what it is for. The history of sports medicine is full of compounds with excellent animal data that did nothing measurable in people. Preclinical work earns a hypothesis. It does not earn a syringe.
I compete at club level. Do the anti doping rules really apply to me?
Usually yes, if your sport sits under a national federation that has adopted the World Anti Doping Code, and that catches far more amateur competition than people expect. Check your own code before you accept anybody's reassurance, because strict liability means the explanation afterwards does not help you.
Will you ever stock these if the evidence improves?
If a compound is approved for human use by a regulator, cleared for supply here, and supported by human trials rather than animal work, it stops being this category and becomes a normal question about evidence and dose. Until all three of those are true, no. That is not caution for its own sake. It is the only standard that means anything.
Written for the Supplement Superstore Vault. We sell the supplements that support the work. We do not sell the work. Information here is educational and is not medical advice. Speak with a qualified health professional before changing any protocol, especially during pregnancy, breastfeeding, competitive training or while managing any clinical condition.
