Bestseller
Retatrutide
$60–$95
GLP-3 · 10 / 20 MG · ≥99.5%
Triple-agonist research peptide
Made in Silicon ValleyReference-grade peptides,
Reference-grade peptides,
delivered honestly.
Independent third-party HPLC verification on every lot. Manufactured and shipped same-day from California. The reference-grade peptides researchers have been waiting for.
Featured · LOT PT-2604-A
Retatrutide
GLP-3 · 10 MG
HPLC verified
≥99.5%
≥99.5%
Average HPLC purity
Verified per lot
24h
Same-day shipping cutoff
Before 2pm PT
CA·USA
Manufactured & shipped
Never offshore
99.5%
Gold-standard purity
≥99% HPLC verified by independent ISO 17025–accredited labs. COA on every lot.
CA, USA
100% US-based
Manufactured, packaged, and shipped from our California facility. Never offshore.
$199+
Free 2-day shipping
Free priority shipping on orders over $199. Tracked and insured.
2pm PT
Same-day fulfillment
Orders placed before 2pm PT ship the same business day.
06 / Reference-grade compounds
The catalog
Every vial is lyophilized in a temperature-controlled facility, third-party HPLC tested, and shipped same-day from California.
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Bacteriostatic Water
$10
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Insulin Syringes
$5
10 PACK · 10 PACK · Medical grade
Sterile 1 mL insulin syringes
For research use only. All Pept products are intended for laboratory and research applications. Not for human consumption, ingestion, or any in-vivo use.
The lab
How we verify every lot.
Every batch is tested by an independent ISO 17025–accredited lab. We publish the COA on each product page, traceable by lot number. Most lots exceed 99.5% purity.
- 01
Synthesis
Reference-grade SPPS in a US-based, FDA-registered facility. Documented chain-of-custody from raw amino acids onward.
- 02
Lyophilization
Each vial filled and freeze-dried in a Class-7 cleanroom. Stoppered and capped under inert atmosphere.
- 03
Verification
Lot samples sent to an ISO 17025–accredited lab. HPLC, LC-MS, and endotoxin testing per batch.
HPLC · LOT PT-2604-APASS · 99.4%
0 minRetention time12 min
Method
Reversed-phase HPLC
Column
C18 · 4.6 × 250 mm
Detection
UV @ 220 nm
Endotoxin
< 0.05 EU/mg
What researchers say
Trusted by 1,000+ labs & researchers.
4.9 / 5
From 1,247 verified purchases
Lab tested and legitimate.
Third-party COA matched the spec exactly. Vials arrived sealed, labeled, and properly lyophilized. The level of QA documentation is unmatched at this price.
Marcus T.
Austin, TX · Retatrutide Verified
Quality you can verify.
I run a research lab and we've cycled through several suppliers. Pept's purity reports and chain-of-custody documentation are by far the most thorough I've seen.
Dr. R. Patel
San Diego, CA · GHK-Cu Verified
Same-day shipping is real.
Ordered Tuesday morning. Arrived Thursday. Protected packaging, vials intact. Free 2-day was a deciding factor and they delivered.
Jenna K.
Brooklyn, NY · Glow Stack Verified
Premium without the markup.
Comparable purity to vendors charging 3x. The label design alone tells you these people care about their product.
David L.
Denver, CO · BPC-157 Verified
Questions