Image supplied by Eon Peptides

Metabolic research

GLP-3 RT

Prices checked October 4, 2026

Research synopsis

Previously known as “Reta” on S7 Sciences. GLP-3 RT, also called retatrutide, helps researchers explore how three hormone signals work together to influence appetite, blood sugar, and energy use. Human studies have reported weight loss in people with obesity. It remains an investigational compound, and these research vials are not approved medicines.

Vendor listings

Images, sizes, prices, and COA access.

Prices exclude shipping and taxes. Subscription or volume pricing may differ from the one-vial price shown here.

Vendor stock is checked at 6:00 AM, 12:00 PM, and 6:00 PM Pacific every day and updated accordingly.

Image supplied by Eon Peptides

S7SCIENCESEnter at checkoutSingle use only

Eon Peptides

GLP-3 RT (Retatrutide / LY3437943)

$40.50–$202.50

~~Vendor price $45.00–$225.00~~

BOGOBuy 1 Get 1 Free: select two eligible items; the lower-priced item in each pair is freeConfirm the offer in the vendor cart.Extra 5% off with card payment. See Offers for current gifts and eligibility.

5 mgView product Best price: $40.50~~Vendor price $45.00~~BOGO: 2 vials totalEst. $20.25 per vial with the eligible one-use-per-customer codeWith card payment: $19.13 per vial for two matching items.Confirm the offer in the vendor cart.
10 mgView product: $72.00~~Vendor price $80.00~~BOGO: 2 vials totalEst. $36.00 per vial with the eligible one-use-per-customer codeWith card payment: $34.00 per vial for two matching items.Confirm the offer in the vendor cart.
20 mgView product Best price: $103.50~~Vendor price $115.00~~BOGO: 2 vials totalEst. $51.75 per vial with the eligible one-use-per-customer codeWith card payment: $48.88 per vial for two matching items.Confirm the offer in the vendor cart.
30 mgView product: $130.50~~Vendor price $145.00~~BOGO: 2 vials totalEst. $65.25 per vial with the eligible one-use-per-customer codeWith card payment: $61.63 per vial for two matching items.Confirm the offer in the vendor cart.
60 mgView product Best price: $202.50~~Vendor price $225.00~~BOGO: 2 vials totalEst. $101.25 per vial with the eligible one-use-per-customer codeWith card payment: $95.63 per vial for two matching items.Confirm the offer in the vendor cart.
COA access: Public download
Coupon: S7SCIENCES

Coupon required for the displayed price

Enter S7SCIENCES at checkout to receive 10% off.

Limited to one use per customer.

S7SCIENCES is single use only: one use per customer. Enter it at checkout for 10% off eligible paid items, including orders with automatic Buy 1 Get 1 Free. If you have already used the code, the coupon discount does not apply again. Select two eligible items for BOGO; the lower-priced item in each pair is free. Current base prices already include Eon's price adjustment. Confirm the code, free items, shipping, and final total in the vendor cart.

Public reference documents are linked in Eon's official COA library; confirm the exact strength and current batch before ordering

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Add to cart at Eon Peptides Open COA library

Image supplied by MSAmino

S7SCIENCESEnter at checkout

MSAmino

GLP-3 (RT) / Retatrutide

$55.99–$163.99

~~Vendor list $69.99–$204.99~~

BOGOAutomatic Buy 1 Get 1 Free, get an additional 20% with the S7SCIENCES codeConfirm the offer in the vendor cart.

10 mgView product Best price: $55.99~~Vendor list $69.99~~BOGO: 2 vials totalEst. $28.00 per vial at the displayed S7 price
20 mgView product: $107.99~~Vendor list $134.99~~BOGO: 2 vials totalEst. $54.00 per vial at the displayed S7 price
30 mgView product: $151.99~~Vendor list $189.99~~BOGO: 2 vials totalEst. $76.00 per vial at the displayed S7 price
50 mgView product Best price: $163.99~~Vendor list $204.99~~BOGO: 2 vials totalEst. $82.00 per vial at the displayed S7 price
COA access: Public download
Coupon: S7SCIENCES

Coupon required for the displayed price

Enter S7SCIENCES at checkout to receive 20% off.

If already applied by the link, confirm the code in your cart. This code can be used on repeat orders.

Automatic sitewide Buy 1 Get 1 Free includes a matching free item with each paid item. S7SCIENCES gives another 20% off eligible paid items and can be used on repeat orders. Confirm the code, free items, shipping, and final total in the vendor cart.

A public exact certificate is listed for 10 mg; request the current exact 50 mg batch certificate

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Add to cart at MSAmino Open COA library

More vendor prices5 additional partners

S7SCIENCESEnter at checkout

NeuroLabsNL-3 RT6 current options

View product $54.01~~Vendor price $60.01~~BOGO: 2 vials totalEst. $27.01 per vial at the displayed S7 price

View product $84.06~~Vendor price $93.40~~BOGO: 2 vials totalEst. $42.03 per vial at the displayed S7 price

View product $138.11~~Vendor price $153.46~~BOGO: 2 vials totalEst. $69.06 per vial at the displayed S7 price

View product $174.16~~Vendor price $193.51~~BOGO: 2 vials totalEst. $87.08 per vial at the displayed S7 price

View product $222.22~~Vendor price $246.91~~BOGO: 2 vials totalEst. $111.11 per vial at the displayed S7 price

View product $281.75~~Vendor price $313.06~~BOGO: 2 vials totalEst. $140.88 per vial at the displayed S7 price

Coupon required for the displayed price

Enter S7SCIENCES at checkout to receive 10% off.

BOGOBuy 1 Get 1 Free plus 10% off with S7SCIENCES — matching items and strengths onlyConfirm the offer in the vendor cart.

Listing details

Enter S7SCIENCES for 10% off eligible items. Current eligible matching-item quantity offers are calculated separately.

Available on requestThe vendor’s July 18, 2026 report identifies its 10 mg sample as GLP RT. Request a report for the exact selected strength and current batch.

View NeuroLabs Request COA

S7SCIENCES10Enter at checkout

Midwest PeptideGLP-3 RT3 current options

10 mgView product $62.99~~Vendor price $69.99~~

20 mgView product $121.49~~Vendor price $134.99~~

30 mgView product $179.99~~Vendor price $199.99~~

Coupon required for the displayed price

Enter S7SCIENCES10 at checkout to receive 10% off.

If already applied by the link, confirm the code in your cart.

Listing details

The tracked link applies S7SCIENCES10 for 10% off ordinary orders. Box Builder orders cannot combine with coupon codes. Confirm the offer in the vendor cart.

Public downloadPublic, batch-specific HPLC purity and mass-spectrometry identity records from independent laboratories

View Midwest Peptide Open COA library

S7SCIENCESEnter at checkout

Amino Science LabsGLP-3 (RT) · Retatrutide3 current options

10 mgView product $66.39~~Vendor list $97.64~~Buy 1 Get 1 Free: 2 vials totalEst. $33.20 per vial at the displayed S7 price

20 mgView product Sold out$99.99~~Vendor list $147.05~~

30 mgView product Best price$124.79~~Vendor list $183.52~~Buy 1 Get 1 Free: 2 vials totalEst. $62.40 per vial at the displayed S7 price

Coupon required for the displayed price

Enter S7SCIENCES at checkout to receive 20% off.

If already applied by the link, confirm the code in your cart. This code can be used on repeat orders.

Buy 1 Get 1 Free — 2 vials total10 mg, 30 mg

Match the same product and strength. Confirm the matching free item and S7SCIENCES code in the vendor cart.

Listing details

Current one-unit prices reflect the vendor's public 15% sale. The reusable S7SCIENCES code applies another 20% off eligible items; confirm the sale, code, and final total in the vendor cart.

Public downloadPublic, exact 10 mg, 20 mg, and 30 mg batch certificates from Freedom Diagnostics

View Amino Science Labs Open COA library

Alpha Pro Peptides GLP-3 RT 10 mg product

Alpha Pro PeptidesGLP-3 (Retatrutide)4 current options

View product $74.99BOGO: 2 vials totalEst. $37.50 per vial at the displayed price

View product $119.99BOGO: 2 vials totalEst. $60.00 per vial at the displayed price

View product $169.99BOGO: 2 vials totalEst. $85.00 per vial at the displayed price

View product $199.99BOGO: 2 vials totalEst. $100.00 per vial at the displayed price

BOGOBuy one eligible product and get one freeApplies automatically; confirm the free item in the Alpha Pro cart.

Public downloadPublic, lot-specific HPLC purity and LC-MS identity records from Freedom Diagnostics

View Alpha Pro Peptides Open COA library

S7SCIENCES10Enter at checkout

American Peptides5 current options

10 mgView product $94.50~~Vendor price $105.00~~

20 mgView product $180.00~~Vendor price $200.00~~

30 mgView product $216.00~~Vendor price $240.00~~

48 mgView product $270.00~~Vendor price $300.00~~

60 mgView product $360.00~~Vendor price $400.00~~

Coupon required for the displayed price

Enter S7SCIENCES10 at checkout to receive 10% off.

If already applied by the link, confirm the code in your cart.

Public downloadPublic, lot-matched COA library

View American Peptides Open COA library

Vendor documents

COAs are supplied by the vendor or its testing laboratory. S7 Sciences labels access but does not independently authenticate a lot.

Matched value

Each vendor's displayed vial strength or bottle volume is shown beside its current one-unit price.

Research boundary

This comparison is not a recommendation for personal use and does not address clinical safety, sterility, or effectiveness.

Research-use reference only

S7 Sciences is not the seller.

Orders, payments, fulfillment, returns, product claims, and customer support are handled by the selected third-party vendor. Nothing on this page is medical, dosing, diagnostic, or therapeutic guidance. Research summaries describe commonly studied mechanisms and do not establish safety or effectiveness. Linked materials are not intended for human or veterinary use.