Retatrutide for Sale: R-30 & R-10 Vials, Price & COA

Which Vial to Buy: R-30 or R-10

Buy the R-30 if you plan a full cycle.

At $250, or $125 with code PEPTIDEDECK, the R-30 works out to about $4.17 per milligram. The R-10 costs $100, or $50 with the code, which is $5.00 per milligram. Same compound, same lab, same shipping. The bigger vial is simply cheaper per dose.

That gap matters because retatrutide doses climb. A common schedule starts at 2 mg a week and steps up every four weeks, to 4 mg and then 8 mg. Those first 12 weeks use about 56 mg, so most people need two R-30 vials for a first cycle.

The R-10 earns its place in one situation: a first order, when you want to check your tolerance and the seller before spending more. After that, the R-30 is the better buy.

Retatrutide Price Check: Cost Per mg Across Six Sellers

Prices move every few weeks, so we date ours.

On September 23, 2026 we checked the price of a single 30mg retatrutide vial at six sellers, and we rechecked Ascension's on September 30 after it raised the R-30 from $200 to $250. The comparison table on this page lists each one per milligram.

Here's the honest part. RetaHQ lists a 30mg vial at $95, which is $30 under the $125 you pay at Ascension with our code. Kits4Less sits at $129, Royal Peptides at $180, PeptideLabs at $206.99 and Alpha Liquids at $230. Without the code, Ascension's $250 list price is the highest of the six, so the code is what makes it competitive.

So why do we still send you to Ascension? Its product page links the lab report for the exact batch it ships: batch number, purity, net content and an identity test. RetaHQ points to a general COA library instead of a report for the batch on the listing. That $30 is the cost of knowing what's inside the vial you actually receive.

How to Verify a Retatrutide COA Before You Buy

A COA only helps if it matches your vial.

Check five things on any retatrutide certificate of analysis before you order.

1. The batch number on the report matches the batch on the vial you receive. The current R-30 batch is 43-05260628.

2. Purity is measured by HPLC and sits above 98%. The R-30 batch reads 99.832%.

3. Identity is confirmed by mass spectrometry (LC-MS). Purity alone can't tell you the powder is retatrutide rather than a cheaper peptide.

4. Net content is within 10% of the label. The R-30 batch holds 32.43 mg in a 30 mg vial.

5. The lab can be checked independently. Kovera Labs reports carry a report number and an access code you can enter at koveralabs.com/verify.

One caveat on the smaller vial: the current R-10 batch (03-05260628) tested at 98.863% purity with 10.57 mg in a 10 mg vial. That is inside specification, but it's a notch below the R-30 batch.

Red Flags When You Buy Retatrutide Online

Cheap retatrutide is usually expensive retatrutide.

Walk away from any listing that shows a certificate with no batch number, or the same certificate for every size it sells. Walk away when the purity figure has no named lab behind it.

Be careful with "retatrutide pens". Eli Lilly has not released a retatrutide pen, so any pen sold online was filled by a third party. You have no way to check what went into it.

Treat 30mg prices that look like 10mg prices with suspicion, too. An underfilled or low-purity vial doesn't just waste money. It makes a dose that should work look like a dose that doesn't.

Buying Logistics: Shipping, Stock and Checkout

Both vial sizes were in stock when we checked on September 23, 2026.

Ascension ships from inside the US. Orders are dispatched within 24 hours and usually arrive in 2 to 5 business days. Enter code PEPTIDEDECK at checkout for 50% off the listed price; it applies to both vial sizes.

Is Retatrutide Legal to Buy?

Short answer: it's complicated, and it depends on where you live.

Retatrutide has no FDA approval yet. Eli Lilly's phase 3 program is still running; results from the TRANSCEND-T2D-1 trial in type 2 diabetes were published in The Lancet in June 2026. Until approval, no pharmacy can fill a prescription for it, and it is sold online as a freeze-dried peptide vial.

The rules on buying and holding it for personal use vary by country and are not settled. Talk to a licensed clinician before you use any GLP-1 medicine, and check your local rules before you order.

This page is for information only and is not medical advice.

Reconstitution and Storage

Mixing takes two minutes and one rule: go slowly.

Add 3 mL of bacteriostatic water to an R-30 and you get 10 mg per mL. On a U-100 insulin syringe, 20 units is then 2 mg and 40 units is 4 mg. Run the water down the side of the vial and swirl gently; never shake it.

Keep unmixed vials in the freezer. Once mixed, keep the vial in the fridge and use it within about 30 days. The PeptideDeck peptide calculator works out the units for any other water volume or dose.