High-purity research peptides, third-party tested.

Independent lab testing for identity and purity, with a Certificate of Analysis for every lot. For laboratory and research use only.

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100% Third-party assayed

COA Per lot, per compound

24H Same-day fulfillment

4.9 /5

Based on 6,200+ reviews

Independently verified

★★★★★
Oct 13, 2026

Fast shipping. Great service.

MH
★★★★★
Oct 13, 2026

Amazing authentic products, quick delivery time, excellent customer service. I really appreciate all the information and effort that there has been providing to me as a first time customer. A+

Rhys Chang Glow, Nad, Selank, Tirzepatide
★★★★★
Sep 21, 2026

Super impressed with the product. The shipping was fast & the customer service was very helpful with all my questions. Highly recommend

Gina Westwell Verified Glow
★★★★★
Sep 20, 2026

the best peptides in the game right now, totally has changed the standard of peptides.

Madi Verified motss-c
★★★★★
Sep 20, 2026

Happy with the fast shipping and customer service.

FN Verified
★★★★★
Sep 20, 2026

Really happy with the customer service, and the really fast shipping! Never ordering from anywhere else ever again! Highly recommend!

Anonymous Verified Ghk-cu
★★★★★
Sep 20, 2026

I’m happy with the fast shipping and customer service.

Lynn Lyn Verified
★★★★★
Sep 20, 2026

I am super happy with the results of the peptides. The shipping was fast and reliable. I highly recommend it.

Marina Leyderman Verified GLOW
★★★★★
Sep 20, 2026

Synapse research has great customer service and fast shipping! Very happy 😃

Damian Verified GLP3-RTA
★★★★★
Jul 24, 2026

From the packaging to the little handwritten thank-you note, everything feels considered. Synapse Peptides has quietly become the only supplier I recommend to friends.

Aisha M. Verified
★★★★★
Jul 19, 2026

The multi-pack pricing is fantastic value. Shipping is quick, tracking is accurate, and I have never once had a vial arrive damaged.

Ryan B. Verified TB-500
★★★★☆
Jul 15, 2026

Four stars because I would love a larger vial option, but the NAD+ quality itself is excellent and every batch matches its certificate of analysis exactly. Consistency you can count on.

David T. NAD+

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Verified compounds

LOT SPRETA001

GLP3-RTA

99.85% Purity COA ↗

MW 4731.4 g/mol

Price range: $130.00 through $2,320.00 View

Select options This product has multiple variants. The options may be chosen on the product page
Sale LOT SPTESA001

Tesamorelin

99.32% Purity COA ↗

MW 5135.9 g/mol

Price range: $120.00 through $1,680.00 View

Select options This product has multiple variants. The options may be chosen on the product page
LOT SPTIRZ001

GLP2-T

99.72% Purity COA ↗

MW 4813.5 g/mol

Price range: $130.00 through $1,040.00 View

Select options This product has multiple variants. The options may be chosen on the product page
LOT SPKLOW001

KLOW / 80mg

99.92% Purity COA ↗

Price range: $200.00 through $1,600.00 View

Select options This product has multiple variants. The options may be chosen on the product page