# Buy Tirzepatide Peptide (Tirz) in Australia

Supplied by Australian Research Peptides Pty Ltd to laboratories and
researchers in Australia, for in vitro research purposes only. Stock is
held and dispatched within Australia.

Tirzepatide, the dual GIP and GLP-1 research peptide often shortened to tirz, is sold to laboratories and researchers in Australia by Australian Research Peptides at $129.99 for the 10 mg vial (out of stock), $189.99 for the 20 mg (out of stock) and $269.99 for the 40 mg (out of stock). Each vial holds freeze-dried tirzepatide, one laboratory-made chain of 39 amino acids modelled on the gut hormone GIP, with a 20-carbon fatty chain attached. In vitro research purposes only.

Research context: GIP and GLP-1 receptor research.

## Strengths, prices and availability

| Strength | Price (AUD) | Availability | SKU |
| --- | --- | --- | --- |
| 10 mg | $129.99 | Out of stock | 43056 |
| 20 mg | $189.99 | Out of stock | 42817 |
| 40 mg | $269.99 | Out of stock | 47263 |

- 10 mg: https://www.australianresearchpeptides.au/products/tirzepatide/10mg
- 20 mg: https://www.australianresearchpeptides.au/products/tirzepatide/20mg
- 40 mg: https://www.australianresearchpeptides.au/products/tirzepatide/40mg

## Specifications

| Property | Value |
| --- | --- |
| Scientific name | Tirzepatide (LY3298176) |
| Compound class | Synthetic 39-amino-acid peptide; dual GIP / GLP-1 receptor agonist |
| Appearance | White to off-white lyophilised (freeze-dried) powder |
| Packaging | Sealed, tamper-evident glass vial |
| Storage | Sealed vial kept cold and dry; below -15 C for long-term storage, 4 C for short periods |

## About

Tirzepatide is a laboratory-made peptide studied in metabolic research that binds two hormone receptors, GIP and GLP-1, which is why it is called a dual agonist, meaning it binds and switches on two receptor types at once. Eli Lilly developed it under the code LY3298176. By receptor count it sits between the two other GLP-1-class peptides Australian Research Peptides lists, semaglutide at one receptor and retatrutide at three.

Its structure is one chain of 39 amino acids that follows the sequence of GIP, a hormone the gut releases. Positions 2 and 13 hold aminoisobutyric acid (Aib), an amino acid the genetic code does not specify, and the last amino acid carries an amide cap, a small chemical end-group. A 20-carbon fatty diacid, meaning a fatty chain with an acid group at each end, is joined through a short linker to the lysine at position 20, which the 2018 discovery paper says lets the molecule bind albumin, a common carrier protein.

In that paper's laboratory binding tests, tirzepatide held the GIP receptor about as tightly as natural GIP and the GLP-1 receptor about five times less tightly than natural GLP-1. Those are measurements made with cells in glassware, not results in any living subject. Australian Research Peptides supplies tirzepatide as freeze-dried reference material for in vitro work, meaning glassware and cell culture.

In Australia, Australian Research Peptides offers tirzepatide to laboratories and researchers as 10 mg, 20 mg and 40 mg vials, and each strength has its own page and stock code. Buyers also search for it as tirz or tirzepatide peptide. Orders are filled from Sydney and posted domestically, so none depends on an overseas shipment clearing customs. The CoA library shows which Tirzepatide strengths, if any, have a published certificate.

## Questions

### Where to buy Tirzepatide in Australia?

Tirzepatide is listed in Australia by Australian Research Peptides, which supplies laboratories and researchers, in three vial strengths: A$129.99 for the 10 mg, A$189.99 for the 20 mg and A$269.99 for the 40 mg, all out of stock. Each strength has its own page and stock code, and every parcel is sent from Sydney to all states and territories, so nothing crosses a border; while a strength is out of stock, the email sign-up on its page sends one message when that vial returns. Searching tirz or LY3298176 finds the same listing.

### What is Tirzepatide?

Tirzepatide is a laboratory-made peptide that binds both the GIP and GLP-1 receptors, which is why it is called a dual agonist, and Eli Lilly created it as LY3298176. It is one chain of 39 amino acids following the sequence of GIP, a hormone the gut releases, with a 20-carbon fatty chain attached ([Coskun 2018](https://pmc.ncbi.nlm.nih.gov/articles/PMC6308032/)). Australian Research Peptides sells it as freeze-dried powder to laboratories and researchers for in vitro research.

### How much does Tirzepatide cost in Australia?

Tirzepatide costs A$129.99 for the 10 mg vial (out of stock), A$189.99 for the 20 mg (out of stock) and A$269.99 for the 40 mg (out of stock) at Australian Research Peptides. The price per milligram falls as the vial gets larger, and each strength's page works out its own rate from the live price. Every strength has to be restocked before an order can be posted, and the email sign-up on each strength's page says when that happens. Postage is added at checkout and depends on the delivery service chosen.

### Is Tirzepatide in stock in Australia?

Tirzepatide is out of stock in Australia at Australian Research Peptides in all three strengths, 10 mg, 20 mg and 40 mg, so no vial can be ordered or posted today. Every strength has its own buy box, and a strength that is out of stock shows an email sign-up there in place of Add to Cart. One message is sent when that vial returns, and signing up reserves nothing and costs nothing.

### What is the difference between Tirzepatide and Retatrutide?

Tirzepatide and retatrutide differ by one receptor: tirzepatide binds GIP and GLP-1, while retatrutide binds GIP, GLP-1 and glucagon, a hormone made in the pancreas. Both are 39-amino-acid chains built on a GIP backbone with a 20-carbon fatty diacid (a fatty chain with an acid group at each end) attached, joined at position 20 on tirzepatide and at position 17 on retatrutide ([Li 2024](https://pmc.ncbi.nlm.nih.gov/articles/PMC11255275/)). Australian Research Peptides lists both, and [Retatrutide](https://www.australianresearchpeptides.au/products/retatrutide) has its own page.

### What is the difference between Tirzepatide and Semaglutide?

Tirzepatide and semaglutide differ in how many receptors they bind and which hormone each copies: semaglutide binds GLP-1 alone and is built on GLP-1, while tirzepatide binds GIP and GLP-1 and is built on GIP. Semaglutide is 31 amino acids long with an 18-carbon fatty chain ([Knudsen and Lau 2019](https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2019.00155/full)), and tirzepatide is 39 long with a 20-carbon one. Australian Research Peptides lists both, and [Semaglutide](https://www.australianresearchpeptides.au/products/semaglutide) has its own page.

### Is Tirzepatide a GLP-1 peptide?

Yes, tirzepatide binds the GLP-1 receptor, but not only that one: it also binds the GIP receptor, so it is classed as a dual GIP/GLP-1 agonist rather than a single-receptor GLP-1 peptide like semaglutide. Its chain is modelled on GIP, not on GLP-1, which is the other way it differs from the GLP-1 copies. Australian Research Peptides lists it in the Metabolic Research range beside semaglutide and retatrutide.

### What is the difference between the Tirzepatide 10 mg, 20 mg and 40 mg vials?

The Tirzepatide 10 mg, 20 mg and 40 mg vials hold the same freeze-dried peptide in different amounts, so the number on each is simply the milligrams of tirzepatide sealed inside. The [40 mg vial](https://www.australianresearchpeptides.au/products/tirzepatide/40mg) holds four times as much as the [10 mg vial](https://www.australianresearchpeptides.au/products/tirzepatide/10mg) and twice as much as the 20 mg. Each strength has its own page, stock code and price, and the CoA library shows which strengths have a certificate published.

### How much liquid is added to reconstitute Tirzepatide?

No single volume is correct for reconstituting Tirzepatide, and Australian Research Peptides publishes no fill volume for any of its three vials, because the liquid added changes only how concentrated the solution is. The milligrams of tirzepatide in the glass are the figure on the label whatever volume goes in, so each laboratory sets the volume to suit its own method. Each strength's page also answers this for its own vial.

### How should Tirzepatide be stored?

Tirzepatide should be stored as sealed freeze-dried powder, cold and dry, and [Bachem](https://www.bachem.com/knowledge-center/handling-and-storage-guidelines-for-peptides/)'s peptide handling guidance puts lyophilised peptide below -15 °C for long-term storage, with 4 °C in a refrigerator acceptable for short periods. Let a cold vial reach room temperature in a closed, dry container before opening it, because the powder pulls moisture from the air. The 10 mg, 20 mg and 40 mg vials all store the same way.

### Is Tirzepatide legal in Australia?

Tirzepatide from Australian Research Peptides is sold in Australia only as a reference compound for in vitro laboratory research, not as a medicine, and never for use in a person or an animal. The registered medicine that contains tirzepatide is a separate, finished product dispensed by pharmacies on prescription, and research powder is not a substitute for it. Each buyer is responsible for the rules that govern its own laboratory work.

### Can I buy Tirzepatide at Chemist Warehouse?

Chemist Warehouse is a pharmacy, so the only tirzepatide it can hand over is the registered medicine, dispensed against a prescription, and that is not the product Australian Research Peptides sells. Australian Research Peptides supplies tirzepatide to laboratories and researchers as freeze-dried research powder in sealed glass for in vitro work. The compound name is shared; the product, the way it is supplied and its permitted use are not.

### Can Australian compounding pharmacies still make Tirzepatide?

No, Australian compounding pharmacies can no longer make Tirzepatide, because the [TGA](https://www.tga.gov.au/news/media-releases/update-glucagon-peptide-1-receptor-agonists-glp-1-ras-pharmacy-compounding-changes) says that from 1 October 2024 pharmacists may not compound and supply medicines containing GLP-1 receptor agonists, in any form. The TGA's notice names tirzepatide among the medicines that change covers. Australian Research Peptides does not compound or dispense anything: it supplies research powder to laboratories and researchers for in vitro work.

### Is research-grade Tirzepatide the same as a registered tirzepatide medicine?

No, the Tirzepatide vial Australian Research Peptides supplies is not a registered medicine, nor a replacement for one: it is plain freeze-dried powder in a sealed vial, supplied for in vitro laboratory research. A registered medicine is a finished, assessed product with its own manufacturer, strength and label. The two share a compound name, and nothing more is claimed for the research vial.

### What is tirz?

Tirz is the common short name for Tirzepatide, the dual GIP and GLP-1 research peptide, so tirz peptide and the full name mean the same compound. People shorten the long name when they search for it or write about it. Tirzep is a second shortening, and both short forms open the same listing in the Australian Research Peptides site search.

### How does Tirzepatide work?

In laboratory binding tests, Tirzepatide binds and switches on two hormone receptors, GIP and GLP-1, where a receptor is the protein on a cell's surface that a hormone locks onto. [Coskun 2018](https://pmc.ncbi.nlm.nih.gov/articles/PMC6308032/) measured binding constants of 0.135 nM (nanomolar, a concentration unit) at the GIP receptor, about the same as natural GIP, and 4.23 nM at the GLP-1 receptor, about five times weaker than natural GLP-1; a lower number means a tighter hold. These are measurements in cells in glassware, not effects in any living subject.

### What does 'dual agonist' mean?

A dual agonist is one molecule that binds and switches on two different receptor types, and tirzepatide is called one because it acts at both the GIP and GLP-1 receptors. 'Agonist' is the pharmacology word for a molecule that activates a receptor, and 'dual' counts the receptors. A single-receptor peptide such as semaglutide acts at one, and a triple agonist such as retatrutide acts at three.

### How many amino acids are in Tirzepatide?

Tirzepatide has 39 amino acids in one continuous chain, built on the sequence of GIP, and two of those positions, 2 and 13, hold aminoisobutyric acid (Aib), an amino acid the genetic code does not specify. The last amino acid carries an amide cap (a small chemical end-group), and the 20-carbon fatty chain on the lysine at position 20 is a side chain, not an extra amino acid in the count ([Coskun 2018](https://pmc.ncbi.nlm.nih.gov/articles/PMC6308032/)).

### What exactly is in a Tirzepatide vial?

A Tirzepatide vial contains only freeze-dried tirzepatide, a white to off-white powder sealed in glass under a tamper-evident cap, with no liquid, carrier or second peptide added. Its 20-carbon fatty chain is part of the molecule itself, joined to the chain by a chemical bond, so the powder is one compound rather than a blend. The 10 mg, 20 mg or 40 mg on the label is the weight of tirzepatide inside.

### Who developed Tirzepatide?

Eli Lilly developed Tirzepatide, which its scientists described in 2018 under the development code LY3298176 as a dual GIP and GLP-1 receptor agonist built on the GIP sequence ([Coskun 2018](https://pmc.ncbi.nlm.nih.gov/articles/PMC6308032/)). The same company holds the United States approvals for the finished medicines that contain it. Australian Research Peptides has no connection with Eli Lilly and supplies research-grade tirzepatide powder for laboratory use.

### What else is Tirzepatide known as?

Tirzepatide goes by Eli Lilly's development code LY3298176 as well as its generic name, and the 2018 paper that first described it uses the code throughout. Chemistry databases list the molecule as [ChEBI:194186](https://www.ebi.ac.uk/chebi/CHEBI:194186). In searches it is shortened to tirz or tirzep, which mean the same compound. It is often grouped with GLP-1 peptides, but it acts at the GIP receptor as well, so it is a dual agonist rather than a GLP-1 copy. Australian Research Peptides lists it by the generic name.

### Does Tirzepatide come as a tablet, a capsule or a liquid?

No, Tirzepatide from Australian Research Peptides comes only as freeze-dried powder sealed in a glass vial, not as a tablet, capsule, liquid or ready-made solution, in 10 mg, 20 mg and 40 mg strengths. The powder is dissolved in the laboratory before any in vitro work, by whatever method that laboratory uses. No other form of the compound is listed, and nothing else is supplied in the vial.

### Which Tirzepatide vial costs least per milligram?

The 40 mg Tirzepatide vial costs the least per milligram and the 10 mg costs the most, with the 20 mg in between, at Australian Research Peptides' current prices. Each strength's page works out its own rate per milligram from the live price. The trade-off is volume: a larger vial makes more solution once it is mixed, and a mixed peptide solution keeps for a limited time.

### Does Australian Research Peptides sell Tirzepatide 5 mg, 15 mg, 30 mg or 60 mg?

Australian Research Peptides does not list Tirzepatide 5 mg, 15 mg, 30 mg or 60 mg, because the strengths it supplies are 10 mg, 20 mg and 40 mg vials, the three shown on this page. Other suppliers choose their own vial sizes, which is why strengths differ from shop to shop. More than 40 mg on one order simply means more than one vial, each in its own sealed glass.

### How do you reconstitute Tirzepatide?

Tirzepatide is reconstituted, meaning dissolved back into solution, by adding a diluent to the sealed vial and letting the liquid run down the glass wall rather than straight onto the powder. The vial is then rolled or swirled gently, never shaken, until no specks remain. Australian Research Peptides supplies the powder dry and sets no fill volume, because the volume added only decides how concentrated the solution is.

### How long does reconstituted Tirzepatide keep?

Australian Research Peptides has no tirzepatide-specific stability data for a laboratory-mixed solution, so its storage panel applies: 2 to 8 °C, used within eight to twelve weeks, out of light and never refrozen after thawing. [Bachem](https://www.bachem.com/knowledge-center/handling-and-storage-guidelines-for-peptides/) advises against keeping peptide solutions long term, especially where the chain contains glutamine or tryptophan, and tirzepatide's chain contains both. For longer holds, Bachem prefers single-use portions frozen below -15 °C.

### Is it normal for a Tirzepatide vial to look empty?

Yes, a Tirzepatide vial can look almost empty, especially the 10 mg, because ten milligrams of freeze-dried peptide is a thin white film or small disc on the base of the glass. The 20 mg and 40 mg vials hold two and four times as much and show a more obvious cake. Holding the vial against a dark background usually makes the powder visible, and an intact seal is the check that matters.

### Why is Tirzepatide cloudy after mixing?

Cloudiness in freshly mixed Tirzepatide is most often trapped air: a stream aimed at the powder, or a shake instead of a swirl, fills the liquid with tiny bubbles that scatter light and rise away within minutes. If a haze is still there after ten minutes at room temperature, some powder has not gone into solution or the peptide has clumped. A properly dissolved vial reads clear and colourless against the light.

### Does a Tirzepatide vial come with a diluent?

No, a Tirzepatide vial comes without a diluent, which is the liquid a dried solid is dissolved into, because each sealed vial holds only freeze-dried tirzepatide. The laboratory supplies its own diluent, glassware and measuring equipment to suit its method, and that choice also sets how concentrated the finished solution is. Australian Research Peptides supplies the vial for in vitro research purposes only.

### Is Tirzepatide tested before it is supplied in Australia?

Yes, Tirzepatide from Australian Research Peptides is independently lab-tested before release, and the single-peptide certificates in its library report two results: purity by HPLC, which separates a sample, and identity by mass spectrometry, which weighs the molecule. Identity matters most for tirzepatide, because a batch missing its fatty chain or an Aib position would still look like the same white powder. No matching certificate is currently published for this product at any strength.

### What does the testing on Tirzepatide actually establish?

The analytical testing behind a Tirzepatide certificate establishes purity by HPLC, a method that separates a sample into its parts, identity by the molecule's measured mass and, where the report states it, the milligrams of peptide in the vial. Purity is the share of the sample under the main peak. The mass check confirms that peak has tirzepatide's weight with the fatty chain attached. Neither test covers sterility or endotoxin (a bacterial contaminant), and neither says anything about use in a living subject.

### Which certificate applies to my Tirzepatide vial?

The certificate that applies to a Tirzepatide vial is the one for its exact strength, because the 10 mg, 20 mg and 40 mg are separate listings, and the CoA library shows which of them has a certificate published. One strength's document never stands in for another's, so a 40 mg vial is matched only against a 40 mg certificate. No matching certificate is currently published for this product at any strength.

### Who supplies Tirzepatide in Australia?

Australian Research Peptides (ARP), a Sydney company, supplies Tirzepatide to laboratories and researchers across Australia and posts each order domestically rather than importing vials once an order arrives. Its listing pairs the generic name with Eli Lilly's development code LY3298176, and the 10 mg, 20 mg and 40 mg each carry their own stock code. It takes PayID or bank transfer, and no buy-now-pay-later, wallet or crypto payment.

### How do I get Tirzepatide online in Australia?

Tirzepatide can be ordered online in Australia from Australian Research Peptides by choosing the 10 mg, 20 mg or 40 mg strength on its listing, adding it to the cart and completing the checkout form. The parcel cannot be sent while every strength is out of stock, and each buy box then shows an email sign-up in place of Add to Cart. The order reference shown after checkout is what a PayID payment or bank transfer quotes.

### How do I pay for Tirzepatide?

Tirzepatide is paid for by PayID or bank transfer at Australian Research Peptides, both sent from the buyer's own banking app, so no card or bank login is entered on the site. Each payment quotes the order reference so it can be matched to the right order, and dispatch follows the match.

### How long does Tirzepatide take to arrive in Australia?

Tirzepatide is posted from Sydney by Express Post or Standard tracked post, and the [shipping page](https://www.australianresearchpeptides.au/shipping) lists the business days each service takes to every state and territory, with Express Post the faster of the two. Transit is counted from when the parcel is lodged with the carrier, and dispatch follows once payment is matched to the order. The parcel travels within Australia only, so it never waits on customs. Nothing can be posted until a strength is back in stock.

### Does a Tirzepatide order qualify for free shipping in Australia?

A single 40 mg Tirzepatide vial clears the free Standard tracked post threshold in Australia by itself, while one 10 mg or 20 mg vial does not, and the 20 mg falls just short. Any two Tirzepatide vials together clear it, and a pair that includes a 20 mg or 40 mg also reaches the higher free Express Post threshold. Australian Research Peptides checks both against the goods total before any discount code.

### Will customs seize Tirzepatide ordered from overseas?

Tirzepatide sent from an overseas seller can be stopped by the Australian Border Force, and a parcel held at the border may never be released, taking the money paid for it with it. Tirzepatide from Australian Research Peptides avoids that risk because it is posted from Sydney to Australian addresses, so the parcel never crosses a border on its way to the buyer. Import rules for therapeutic goods are set by the TGA and fall on the person importing, not on the overseas seller.

### Is Tirzepatide FDA approved?

Yes, the US Food and Drug Administration approved tirzepatide in May 2022, but only as the active ingredient of Eli Lilly's finished prescription medicines, and that approval does not extend to research powder ([Drugs@FDA](https://www.accessdata.fda.gov/scripts/cder/daf/index.cfm?event=overview.process&ApplNo=215866)). Each approval covers one manufacturer's product with its own label, set strengths and quality controls. Tirzepatide from Australian Research Peptides is unregistered freeze-dried powder for in vitro laboratory work, not an approved medicine.

### Which receptors do Tirzepatide, Retatrutide and Semaglutide bind?

Tirzepatide binds two receptors, GIP and GLP-1; retatrutide binds three, GIP, GLP-1 and glucagon; and semaglutide binds one, GLP-1 alone, which makes receptor count the simplest way to tell the three apart. Tirzepatide and retatrutide are both built on GIP, while semaglutide is built on GLP-1. Australian Research Peptides lists all three for laboratories and researchers, each on its own page with its strengths and live prices.

### What do published Tirzepatide studies measure?

Published Tirzepatide studies include laboratory receptor-binding assays, which measure how tightly it holds each receptor, and registered clinical trials of the finished medicine rather than of research powder. Australian Research Peptides does not reproduce trial results on this page, because those trials tested a manufactured medicine, and it draws no conclusions of its own. The 2018 discovery paper is the main laboratory source cited here ([Coskun 2018](https://pmc.ncbi.nlm.nih.gov/articles/PMC6308032/)).

## Also searched as

Tirz, LY3298176

## Ordering

- Standard post $12.99, free on orders over $199.00
- Express post $16.99, free on orders over $299.00
- Payment: PayID or bank transfer
- Dispatched from within Australia; orders do not cross a border

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Product page: https://www.australianresearchpeptides.au/products/tirzepatide
Shop: https://www.australianresearchpeptides.au/shop