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Retatrutide Peptides

Our retatrutide peptides are sold under the code name RETA-3, in three vial sizes: 10mg, 20mg and 30mg. Every vial is freeze-dried, in stock and ships free worldwide, and code PEPTIRA10 takes 10% off.

Looking for something else? See our GLP-1 peptides and weight loss peptides, or browse all research peptides.

What are retatrutide peptides?

Retatrutide (LY3437943) is a 39-amino-acid peptide from Eli Lilly that acts on three receptors at once: GIP, GLP-1 and glucagon. It’s the first triple hormone receptor agonist to reach late-stage trials, and a fatty acid side chain stretches its half-life to about six days.

In the phase 2 obesity trial published in the New England Journal of Medicine in 2023, average weight loss at the highest dose reached 24.2% at 48 weeks. Lilly’s phase 3 TRIUMPH trials are now running in obesity, diabetes and related conditions.

For the published research behind this range, start with this PubMed search from the National Library of Medicine.

Retatrutide Peptides in our range

How to choose retatrutide peptides

Pick the vial size by the total amount your study needs. Larger vials cost less per milligram: RETA-3 30mg works out to about $5.97 per mg, the 10mg vial to $9.90.

Many labs order RETA-3 alongside TIRZ-2 and SEMA-1 to compare a triple agonist with a dual and a single one in the same model.

RETA-3 vs TIRZ-2 and SEMA-1

RETA-3 (retatrutide) is the only one of the three that acts on the glucagon receptor. TIRZ-2 (tirzepatide) covers GLP-1 and GIP, and SEMA-1 (semaglutide) covers GLP-1 alone.

Labs often run them side by side to see what each added receptor contributes. All three are on our GLP-1 peptides page.

Retatrutide peptides: formats and prices

There are 3 products in this range: three freeze-dried vials. Prices run from $99.00 to $179.00. Every product page lists the amount, the format and the SKU, so you can compare like for like before you order.

Quality and handling for our retatrutide peptides

Every product in this range carries a label with the product name and amount. If your lab needs batch paperwork on file, contact Peptira support before you order and ask what’s available for the current batch. Labs that check incoming material themselves usually confirm identity by mass spectrometry and measure purity by HPLC.

Store sealed vials in the freezer and reconstitute with bacteriostatic water. Every vial page lists the concentration you’ll get for each volume, and our 10 vial kit case keeps vials upright in the fridge.

Ordering and shipping

Every order ships free, with no minimum, to the US, Canada, Europe, Australia and the rest of the world. Orders are packed so vials stay upright and protected in transit, and freeze-dried powder is stable at room temperature for the journey.

Enter PEPTIRA10 at checkout for 10% off the whole order. Paying with crypto takes a little more off, and you can mix products from any category in the same cart.

Why researchers order from Peptira

One supplier for the compounds and the supplies that go with them, clear product names with the amount on every label, and a support team that answers product questions by email. Every product page lists the format, the amount and the SKU, so you can check exactly what you’re ordering before you pay.

Retatrutide peptides FAQ

Are your retatrutide peptides in stock?

Yes. Everything listed here is in stock and ready to ship.

Do you ship retatrutide peptides worldwide?

Yes. Shipping is free on every order, to the US, Canada, Europe, Australia and everywhere else we deliver.

Are retatrutide peptides for human use?

No. Everything we sell is for laboratory research only and isn’t approved for human or veterinary use.

Where can I buy retatrutide peptides?

Right here at Peptira. Pick a product on this page, add it to the cart and it ships free worldwide.

Is there a discount code?

Yes. Use PEPTIRA10 at checkout for 10% off your order, and pay with crypto for an extra discount.

Buy retatrutide peptides online

Pick a product above, add it to your cart and check out in a couple of minutes. Everything on this page is in stock, shipping is free worldwide, and code PEPTIRA10 takes 10% off. Add a few peptide lab supplies to the same order and you’ll have everything you need to start. You can also go back to the Peptira home page.

For laboratory research use only. Not for human or veterinary use.