9 min read · Updated 26 Oct 2026

BPC-157 vs TB-500: what's the difference?

BPC-157 and TB-500 are two of the most talked-about research peptides in Australia, and they're often mentioned in the same breath. Both get filed under "recovery" online, both turn up on the same vendor sites, and both have research that's mostly in animals. But they're different molecules, with different origins, different evidence and different price patterns.

This guide lines them up side by side in plain English: what each one is, what the research does and doesn't show, how they compare on listed price per mg, and what we found in lab reports. It's a comparison of information and listings. It gives no amounts to use, no how-to, and it isn't a recommendation to get either one.

One thing first. Both BPC-157 and TB-500 are sold with the label "Not TGA approved. Research use only." Neither is approved as a medicine in Australia. If you're dealing with an injury or slow recovery, talk to your GP. They can look at what's actually going on and talk you through your options.

BPC-157 and TB-500 at a glance

Here's the short comparison, drawn from our BPC-157 page and TB-500 page:

What it's based on. BPC-157 is a lab-made peptide based on a protein found in stomach juice. TB-500 is a lab-made peptide modelled on a section of thymosin beta-4, a natural protein found in most cells.
Size. BPC-157 is a 15-amino-acid peptide. TB-500 is a short synthetic peptide modelled on just one section of the full thymosin beta-4 protein.
Other names. BPC-157 is also called body protection compound 157, or a gastric peptide fragment. TB-500 is described as a synthetic fragment related to thymosin beta-4.
Commonly discussed for. BPC-157: recovery from injury. TB-500: recovery and tissue repair. In both cases the evidence is limited.
Research in people. Scarce for BPC-157. For TB-500 itself, there are no good trials in people.
Status. Not TGA approved. Research use only. Neither is approved as a medicine in Australia.
Sport. Both are prohibited in sport.

So the two are "similar" mainly in how they're marketed. Chemically and in the research, they come from quite different places.

Where each one comes from

BPC-157 was first studied in Croatia. Most of the research is in rats and cell studies, and much of it comes from a small number of labs. That matters, because results from one research group are stronger when other, independent groups can repeat them. Good-quality trials in people are lacking.

TB-500 is a synthetic peptide modelled on part of thymosin beta-4. The full protein is involved in cell movement and repair, which is why the fragment gets talked about for recovery. But research on a natural protein doesn't automatically carry over to a lab-made fragment of it. Research on TB-500 is mostly in animals and the lab, and there are no good trials of TB-500 itself in people.

A common mistake online is to read studies on the full thymosin beta-4 protein as if they were studies on TB-500. They're related, not the same thing. When you read a claim about TB-500, it's worth asking which molecule the study actually used.

What the research does and doesn't show

It's easy to come away from forums thinking both peptides are well proven. They aren't. Here's the honest picture.

Most of the research is in animals and cells. For both peptides, the bulk of the work is in rats, other animals or lab dishes. Results in those settings often don't hold up in people.
Good human trials are lacking. Neither peptide has the kind of large, well-run human trials that medicines need before approval.
"Commonly discussed for" isn't the same as "shown to work". We use that phrase on our peptide pages on purpose. It describes what people talk about, not what's been proven.
Quality is a separate unknown. Products sold online as research peptides aren't quality-checked. Even if the research were stronger, you'd still need to know that a vial contains what the label says.

If you've read something that sounds more certain than this, ask where it came from. Personal stories and before-and-after posts aren't evidence, and they're common on both of these peptides.

Why they're often mentioned together

You'll often see BPC-157 and TB-500 listed next to each other, sometimes in the same bundle or blog post. That's mostly a marketing pattern. Both sit in the "recovery" group, both are popular, and the same vendors tend to carry both.

We don't cover combining them, and there's no good human evidence for either one on its own, let alone together. Seeing two products sold side by side tells you about the shop's range, not about safety or results.

Sport and the law

Sport. Our peptide pages note that both peptides are banned in sport. We checked the World Anti-Doping Agency's 2026 Prohibited List this week. BPC-157 is named under S0 (non-approved substances), and thymosin beta-4 and its derivatives, such as TB-500, are named under S2 (peptide hormones, growth factors and related substances). Both classes are prohibited at all times, in and out of competition. If you compete in any tested sport, that alone rules them out. Your sport's governing body or Sport Integrity Australia can confirm the current rules.

The law. Neither peptide is approved as a medicine in Australia. A "research use only" label doesn't make a product legal to use, and it doesn't mean anyone has checked it for safety or quality. Our plain-English guide, are peptides legal in Australia?, explains the difference between cosmetic, prescription and research-use-only peptides. For a legal question, talk to a lawyer.

How BPC-157 and TB-500 compare on price per mg

Our price per mg comparison covers both peptides. These are a snapshot, with prices as listed on 13 Oct 2026 (15 Oct 2026 for Omega Peptides Australia). Most rows carry the label "Third-party price, not yet checked". The table is the source of truth, and prices may change.

BPC-157. The table shows 14 BPC-157 listings from 10 vendors, in five, ten and twenty-milligram vials. Across the ten ten-milligram listings, the listed rate runs from AUD 5.00 per mg (Peptide Planet Australia, AUD 49.95) to AUD 10.00 per mg (Omega Peptides Australia, AUD 99.99).

TB-500. The table shows 13 TB-500 listings from 10 vendors, in five and ten-milligram vials. Across the nine ten-milligram listings, the listed rate runs from AUD 5.00 per mg (Peptide Planet Australia, AUD 49.95) to AUD 13.20 per mg (Capital Precision Labs, AUD 132.00).

A few patterns stand out:

TB-500 usually lists higher per mg. Only one ten-milligram TB-500 listing sits under AUD 8.80 per mg, while most ten-milligram BPC-157 listings sit under AUD 8.00 per mg.
The same vendor can price them very differently. Capital Precision Labs lists a ten-milligram BPC-157 vial at AUD 52.00 (AUD 5.20 per mg) and a ten-milligram TB-500 vial at AUD 132.00 (AUD 13.20 per mg). NuVion Health lists them at AUD 69.00 and AUD 99.00. Peptide Planet Australia and Omega Peptides Australia list both at the same price.
Small vials cost more per mg. The four five-milligram TB-500 listings run from AUD 11.19 to AUD 13.80 per mg. All four sit above every ten-milligram TB-500 listing except Capital Precision Labs'.

Don't compare one peptide's price against the other as if they were the same product. They're different molecules, and a lower rate on one says nothing about value or quality on the other. Our explainer on peptide price per mg covers how to compare like with like, and the price per mg calculator does the sums for two packs side by side.

Some vendors offer our readers a discount code, shown in the table's code column. Some links on our site are affiliate links, and we explain how that works on our how we make money page. It never changes the order of the table, which runs by price per mg.

What we found in lab reports

A price is only half the picture. A lab report, or COA (certificate of analysis), shows who tested a product, when, and what they found. Here's what our lab reports directory showed this week:

BPC-157: two reports. NuVion Health, tested by Janoshik Analytical, dated 24 Sept 2026. Ascend Peptides, tested by Janoshik, not dated.
TB-500: one report. NuVion Health, tested by Janoshik Analytical, dated 7 July 2026, which our directory flags as over 90 days old.
Batch numbers: none of these reports had a batch number listed in our directory ("Not stated").

So most BPC-157 and TB-500 listings in the price table have no report we could find, and the only TB-500 report is getting old. A report only covers the batch that was tested, so check the date and batch match what a vendor is actually selling. Our guide on how to read a COA walks through each line, and our COA checker lets you tick off what a report should show. You can see NuVion's reports and checked details on its vendor profile.

The short version

BPC-157 is based on a protein in stomach juice. TB-500 is a fragment modelled on thymosin beta-4. They're different molecules.
Both are commonly discussed for recovery, but research is mostly in animals and cells, and good human trials are lacking.
Both are not TGA approved, research use only, and prohibited in sport at all times.
On our price table (13 Oct 2026), TB-500 usually lists higher per mg than BPC-157, and rates vary a lot between vendors.
Lab reports are thin: two for BPC-157, one older report for TB-500. Check the date and batch before trusting any listing.

Not medical advice. Talk to your GP.