Retatrutide (20mg)

Retatrutide 20mg — reta 20mg, the first real bulk saving

This is the 20mg retatrutide vial at $269.99, or $13.50 per mg. Searched variously as retatrutide 20mg, reta 20mg or 20mg retatrutide, it is the point on the ladder where bulk pricing starts to matter: 16 percent below the 10mg vial per milligram and 33 percent below the 5mg.

Twenty milligrams in one sealed vial suits a study past the pilot stage with a known material requirement, or a lab running two or three arms concurrently from one solution. It is also the largest size a single researcher can realistically consume inside the 28 day reconstituted window at typical aliquot rates, which makes it the practical ceiling for small-scale work.

Filled from the same COA-verified batches as every other size. All sizes are selectable from one listing on the main Retatrutide page.

How to get retatrutide 20mg in Australia

Retatrutide is not registered on the Australian Register of Therapeutic Goods and is not stocked by retail pharmacies, so it is not available through Chemist Warehouse, Priceline or similar. It is supplied in Australia as a research-grade lyophilised compound by research peptide suppliers.

Omega Peptides Australia holds retatrutide in domestic stock, which matters practically: orders placed before 12pm on a business day dispatch the same day and arrive on tracked domestic delivery, rather than waiting on an international shipment and customs. Every batch carries an independent certificate published in the COA library, so the batch number on the vial you receive can be matched against its HPLC and mass spectrometry report before use.

All material is supplied strictly for in-vitro laboratory research.

What a 20mg vial actually yields

Twenty divides cleanly, which is part of why this size is popular.

• Twenty 1mg aliquots from the single vial.
• Ten 2mg aliquots, with nothing left over.
• Five 4mg aliquots, exact.
• Six 3mg aliquots plus a 2mg remainder, so 3mg divides awkwardly here.

Plan around the 28 day refrigerated window rather than the vial contents. Ten 2mg aliquots drawn weekly would run ten weeks, well past that limit, so a 20mg vial is generally opened when a study is ready to run at pace or split across concurrent arms rather than opened speculatively.

Reconstituting a 20mg retatrutide vial

These volumes are calculated for 20mg. Run the water down the inside wall of the vial onto the powder, then swirl until the solution is clear. Do not shake.

2.0 mL is the usual choice at this size: a round 10 mg/mL, a 2mg aliquot at a readable 20 units on a U100 syringe, and a total volume that sits comfortably in a standard vial. The 4.0 mL fill is worth considering only when the protocol uses sub-milligram aliquots and needs the extra measurement resolution.

One 10mL bottle of bacteriostatic water covers five 20mg vials at 2.0 mL each. The reconstitution calculator handles any concentration not shown.

Retatrutide 20mg price against the rest of the range

$269.99 for 20mg is $13.50 per mg. Against the 10mg vial at $16.00 per mg that saves $2.50 on every milligram, or $49.99 across the vial compared with buying two 10mg vials.

Two 10mg vials cost $319.98 for the same 20mg, so the single vial is $49.99 cheaper. The counter-argument is the expiry clock: two separate vials give two independent 28 day windows, one 20mg vial gives you one. For studies running past a month the Box of 10 x 10mg solves that properly. Larger single vials at 30mg and 60mg continue the per-mg drop.

Storing a 20mg vial

Sealed and lyophilised, hold at 2–8°C short term or −20°C long term, away from light and moisture, without repeated freeze-thaw. In the sealed state there is no practical stability difference between vial sizes.

After reconstitution the 28 day refrigerated limit applies to the whole 20mg at once, which is the real planning constraint here. Work out total consumption for the four weeks following reconstitution before opening the vial. If that number is below about 10mg, a smaller vial or the multi-vial box will waste less material than this one.

Running two arms from one 20mg vial

The most common use for a 20mg vial is not one long protocol but two or three shorter ones running at the same time, and the arithmetic works neatly.

Reconstituted at the standard 2.0 mL for 10 mg/mL, a 20mg vial supports two arms drawing 2mg weekly for five weeks each, or three arms drawing 1mg weekly for six weeks each, both comfortably inside the 28 day window if the arms run concurrently rather than sequentially. Every aliquot comes from one solution prepared once, which removes preparation variance between arms as a source of noise.

Sequential arms are the case where this breaks down. Two arms run back to back at five weeks each is a ten week span against a four week window, and the second arm would be drawing from expired solution. For sequential designs, separate sealed vials are the correct structure and the box of ten 10mg vials is the cheapest way to hold them.

Specifications

Batch testing and COA

Janoshik Analytical tests every batch independently. HPLC verifies purity at 99 percent or above and mass spectrometry confirms the measured mass matches the expected molecular weight, verifying identity rather than purity alone. Match the batch number on your vial to its certificate in the COA library. Orders before 12pm leave the same business day from Australian stock.

Other retatrutide sizes

Every retatrutide size Omega Peptides Australia stocks, with the per-mg cost of each. All sizes can also be selected from a single listing on the main Retatrutide page.

• Retatrutide 5mg — smallest vial, $20.00 per mg, $99.99
• Retatrutide 10mg — the standard single vial, $16.00 per mg, $159.99
• Retatrutide 20mg — this page, the first bulk tier, $269.99
• Retatrutide 30mg — established-protocol size, $12.00 per mg, $359.99
• Retatrutide 60mg — lowest cost per mg, $9.83 per mg, $589.99
• Retatrutide Box (10 x 10mg) — ten sealed vials, $11.00 per mg, $1,099.99

Background on the compound itself sits on the Retatrutide product page and in the retatrutide research guide, rather than being repeated on each size page.

Ordered with a 20mg vial

• Bacteriostatic water — a 10mL bottle reconstitutes five 20mg vials at the standard 2.0 mL fill.
• Retatrutide Premium Kit — vials, diluent and consumables in one order.
• Tirzepatide — the dual agonist comparator, useful for isolating which receptor pathway drives an effect.

Frequently asked questions

How much is retatrutide 20mg in Australia?
$269.99 for the 20mg vial, which is $13.50 per mg. That is 16 percent below the 10mg vial at $16.00 per mg and 33 percent below the 5mg vial at $20.00 per mg.

How many doses are in a 20mg retatrutide vial?
Twenty 1mg aliquots, ten 2mg aliquots or five 4mg aliquots exactly. A 3mg aliquot divides less cleanly, giving six with 2mg remaining.

How much bacteriostatic water do I add to a 20mg vial?
2.0 mL is the standard fill, giving 10 mg/mL so a 2mg aliquot reads 20 units on a U100 syringe. Use 1.0 mL for 20 mg/mL or 4.0 mL for 5 mg/mL if you need finer resolution on small aliquots.

Is 20mg cheaper than two 10mg vials?
Yes. One 20mg vial is $269.99 against $319.98 for two 10mg vials, saving $49.99 on the same total material. The trade-off is a single 28 day reconstituted window instead of two.

How do I get retatrutide 20mg in Australia?
Retatrutide is not on the Australian Register of Therapeutic Goods and is not stocked by retail pharmacies, so it is supplied as a research-grade compound by research peptide suppliers. Omega Peptides Australia holds it in domestic stock with same-day dispatch before 12pm and a published COA for every batch.

Is 20mg too much to reconstitute at once?
It depends on consumption rate. Reconstituted retatrutide holds 28 days refrigerated, so 20mg suits work drawing roughly 5mg a week or more, or several concurrent arms. Below that, a smaller vial or the multi-vial box wastes less.

What concentration does a 20mg vial give?
1.0 mL of bacteriostatic water gives 20 mg/mL, the highest practical concentration for this vial, where a 1mg aliquot is just 5 units on a U100 syringe. Most protocols prefer 2.0 mL and 10 mg/mL for easier measurement.

Does the 20mg vial ship the same day in Australia?
Yes, for orders placed before 12pm on a business day, from Australian stock with tracked domestic delivery in discreet unbranded packaging.

⚠ For in-vitro research and laboratory use only. Not for human or veterinary use.