from$105
Every lot tested by an independent US lab
Research peptides with a certificate of analysis on every lot
Synthesized, third-party tested and shipped same day from the USA. The certificate of analysis for every lot is published before the vial is listed, so the number on the label is the number in the report.
99%+Purity by HPLC on every lot
100%Lots third-party tested before listing
2,400+Researchers served
7Tests on every lot before it is listed
Shop the catalog
49 compounds, every lot with a certificate
GLP-1 & Metabolic 6Repair & Recovery 7Peptide Blends 8Growth Hormone Axis 6Longevity & Skin 9Nootropics & Neuro 7Bioregulators 6Lab supplies 2Liquid Sprays 4Dissolving Strips 3
from$100
from$60
from$60
from$55
from$108
#1 research peptide this quarter
Retatrutide
Triple-agonist research peptide with GIP, GLP-1 and glucagon receptor activity in a single lot-matched vial. Synthesized by solid-phase synthesis, verified to ≥99% by mass spectrometry, backed by a downloadable certificate for every lot.
- 10 mg lyophilized
- Lot RT-2609-A · 99.4% HPLC
- Endotoxin < 0.5 EU/mg
- Ships same day
from$105
How ordering works
Four steps from catalog to bench
Choose a compound
Twelve compounds across five categories. Every card shows the current lot purity and the lot number, so you compare certificates rather than marketing.
+What does 99% purity actually mean?Confirm research use
One checkbox at checkout, verified once per account, usually the same day. It keeps the catalog research-only, and it keeps us shipping.
+Who can order?Read the lot report
The certificate for your exact lot is already in the library: identity by LC-MS, purity by HPLC-UV, endotoxin by LAL. The number on the label is the number in the report.
+How do I read a certificate?Shipped the same day
Orders before 2pm Eastern leave our US facility that afternoon with tracking. Sealed vials travel at ambient temperature; cold packs on request.
+Do you ship internationally?Shop the catalog
Which research peptides can you order today?
12 compounds across 5 categories, each synthesized to order and verified against a lot-matched certificate of analysis.
from$105
from$100
from$60
from$60
from$55
from$108
from$90
from$40
from$120
from$50
from$100
from$100
from$170
from$200
from$60
from$80
from$60
from$82
from$70
from$125
from$70
from$110
from$60
from$85
from$60
from$200
from$150
from$70
from$85
from$140
from$55
from$55
from$55
from$75
from$150
from$60
from$65
from$65
from$120
from$70
from$140Sold out
from$90
from$55
from$60
from$60
from$60
from$60
from$60
from$60
from$25
from$49.99
from$100
from$90
from$90
from$110
from$40
from$60
from$174
What 99% pure doesn't tell you
How is every lot tested before it's listed?
Purity is one number. A lot survives seven checks over about 18 days before it appears in the catalog, and the report for each one is published.
Research bundles
Which bundles save 10% or more?
Made here, tested here, shipped here
Synthesized, tested and shipped in the U.S.A.
No re-labelled imports. Every vial is filled in our facility, tested by a laboratory we don't own, and tracked from our dock to your bench.
See how we workResearch guides
What do researchers ask before their first order?
Protocol
How to reconstitute a lyophilized peptide
Bacteriostatic water volumes, swirl-don't-shake, and how to read the concentration off the label.
Read the guide →
Quality
How to read a certificate of analysis
What HPLC purity, LC-MS identity and endotoxin numbers mean, and the three lines most COAs leave out.
Read the guide →
Handling
Storage and stability by compound
Freezer, fridge or bench: a table of storage windows before and after reconstitution.
Read the guide →FAQ
What do researchers ask most?
How do I know the peptides are really tested?
Every lot is sent to an independent US laboratory for identity by LC-MS, purity by HPLC-UV and endotoxin screening before it is listed. The certificate for each lot is published in the COA library, and the lot number on your vial matches the certificate.
What does 99% purity actually mean?
Purity is the share of the peptide-related material in the vial that is the target sequence, measured by HPLC-UV. It does not tell you the net peptide content, sterility or endotoxin level, which is why we test and publish those separately.
When will my order ship?
Orders placed before 2pm Eastern on a business day ship the same day from our US facility with tracking. Orders over $300 ship free.
Can I buy peptides for personal use?
No. Every product on this site is sold for in-vitro laboratory research only and is not for human or animal consumption. Orders require confirmation that the buyer is a qualified researcher or laboratory.
How should lyophilized peptides be stored?
Store sealed vials at -20°C away from light. After reconstitution, keep at 2-8°C and use within the period stated on the certificate of analysis for that lot.
