Retatrutide 10 mg vs 20 mg vs 30 mg: which vial is better value?

Use the selected product page's current price after applicable discounts, in the same currency for every size. Check availability separately: a listed price does not mean every size can be ordered.

The rule is:

Vial price ÷ listed milligrams = cost per labelled mg.

The larger size has a lower unit cost only when its price rises by less than its listed quantity. These checks work at any price:

• 20 mg beats 10 mg on cost per mg when its price is less than twice the 10 mg price.
• 30 mg beats 10 mg when its price is less than three times the 10 mg price.
• 30 mg beats 20 mg when its price is less than 1.5 times the 20 mg price.

Include shipping when comparing the final order totals. A lower price per mg does not guarantee a lower total bill if you are buying more material than the project needs.

On 9 October 2026, the PEPTALIAS listing displayed A$90.99 for 10 mg, A$146.99 for 20 mg and A$174.99 for 30 mg during its Spring Sale. Those prices worked out to A$9.10, A$7.35 and A$5.83 per labelled mg, respectively, rounded to the nearest cent.

Here is how buying the same total quantity compared. These are dated examples before shipping, not a current quote:

The examples compare labelled amounts and container counts, not measured content or batch identity. Check the current Retatrutide selector for today's price and availability.

If your project needs separate vials, several smaller containers may suit it better despite costing more in that example. If it needs one container holding a larger listed amount, compare that option directly.

The current PEPTALIAS listings describe a 3 mL vial for all three sizes. The listed compound amount changes; the listed container capacity does not.

mg measures mass. mL measures volume. A 20 mg selection does not mean 20 mg/mL, and a 3 mL container does not mean it contains 3 mL of liquid.

A concentration such as mg/mL needs both an amount of material and a specified liquid volume. The labelled milligrams alone cannot tell you the concentration. IUPAC's mass-concentration definition explains that distinction. For laboratory concentration maths, see the PEPTALIAS calculator.

No: the label describes more material, not a different molecule. Retatrutide, also called LY3437943, is described in the original discovery paper as one peptide with activity at GIP, GLP-1 and glucagon receptors. Coskun and colleagues, Cell Metabolism, 2022.

For a broader introduction to choosing between different molecules, read What are research peptides?.

The Retatrutide supplier PDF linked by PEPTALIAS labels itself a reference template for customer consultation on its final page. It does not establish the content of each current 10 mg, 20 mg or 30 mg vial.

A purity percentage and a measured amount per vial answer different questions. If your project needs batch-specific or strength-specific evidence, contact PEPTALIAS to confirm which documents cover the selected material before ordering. The COA guide explains the fields to check.

Before buying, answer three questions:

1. How much total material does the project require?
2. How many separate vials does it require?
3. Which currently available option gives the better cost for that quantity and the documentation the project needs?

View Retatrutide sizes and current prices

Comparing other compounds? Browse the PEPTALIAS research guides.

PEPTALIAS materials are for laboratory research only, not human or veterinary use.