High purity, smart price
Stop Overpaying for Peptides
Browse the catalog and the COA library to see just how much you’re going to save with GreySyn. Shop the highest purity peptides at a fraction of the cost of the competition.
High purity, smart price
Stop Overpaying for Peptides
Browse the catalog and the COA library to see just how much you’re going to save with GreySyn. Shop the highest purity peptides at a fraction of the cost of the other guys
- Third-party tested — COA with every lot
- ≥99% verified peptide purity
- Cold-chain storage, secure packaging
- Same-day dispatch available
Featured catalog
Research compounds, ready to ship
A focused selection from our catalog — each with published purity, a lot number, and a downloadable Certificate of Analysis.
99.19%
LOT GS-100410702
GLUCAGON LIKE PEPTIDE
GS3 RT
GLP receptor triple agonist for metabolic research.
Size 10 mg
Purity 99.19%
$45/vial
99.61%
LOT GS-10010524
ANGIOGENESIS
BPC-157
Body-protection compound studied in angiogenesis and tissue-repair models.
Size 10 mg
Purity 99.61%
$25/vial
5.7 pH
LOT GS-20011
reconstitution solution
Bacteriostatic Water
Sterile water with 0.9% benzyl alcohol added to prevent bacterial growth.
Size 30 ml
H-Brand
$25/vial
FEATURED PEPTIDE
GS3-RT
The newest and most exciting research compound in the world, available now in multiple quantities. At a price almost 50% less than the competition, your next research project is within reach.
- Verified purity of over 99%
- Quantities avaiable from 10 - 60mg
- COA for every vial posted in the library
From synthesis to your bench
Every lot follows the same four checks
Quality isn’t a claim — it’s a process you can audit. Here’s what happens before a compound is released for sale.
1
Synthesis
Solid-phase synthesis of the target sequence, followed by lyophilization into single-use vials.
2
HPLC & MS testing
An independent US based lab measures purity by HPLC and confirms identity by mass spectrometry.
3
COA released
Results are published as a lot-specific Certificate of Analysis you can download and archive.
4
Safe Secure Shipping
Securely packaged in multiple layers of custom made protection, and dispatched fast from our US based facilities.
Laboratory protocols
Preserve the integrity of your research projects.
Material quality depends on handling after delivery too. Follow these storage guidelines to protect the stability documented on your COA.
Temperature control
Store lyophilized material frozen for long-term storage and refrigerated for short-term use. Allow vials to reach room temperature before opening.
−20 °C LONG-TERM
Moisture protection
Keep containers tightly sealed to protect against condensation. Minimize exposure to humidity to prevent hydrolysis and clumping.
SEALED + LYOPHILIZED
Light protection
Store away from direct light in original or amber packaging to limit photodegradation of sensitive amino acid chains.
DARK STORAGE
Aseptic technique
Use clean, calibrated equipment and dispose of product at a date in accordance with your lab policies.
STERILE HANDLING
The GreySyn difference
Compare before you commit
Low prices shouldn’t mean compromises on documentation. Here’s how we stack up against the typical supplier.
BIG NAME BRANDS
MASSIVE MARKUP
$154.99
Stop overpaying for the same vial
- Same purity, vial, and documentation claims
- You're paying for the affiliates, and the third party wholesalers, warehouses, and marketers
- Thrown loose in a bubble envelope to cut more corners and you still pay for the shipping
- COA doesn't match vial, mg, or batch number
UNRIVALED VALUE
$80.00
Save $74.99 on a 20mg vial GS3-RT
- Saving 48% for the same 20mg vial means $74.99 back into your research budget
- Intelligent pricing means no markup for middlemen or affiliates
- Shipped fast in layers of high quality custom packaging - always free
- Complete transparency with purity, testing, pricing
What you get
GreySyn
Typical supplier
Third-party HPLC & MS testing
✓ Independent lab
None, or faked records
Batch-specific Certificate of Analysis
✓ Every lot
On request, not batch specific
Published purity per compound
✓ ≥98%, always listed
High claims, no COAs
Research ready pricing
✓ Every day
100-150% higher prices
Support and Service
✓ Ongoing partnership
Just a quick sale
Measured, not marketed
Numbers our customers can hold us to
Average verified purity across the catalog
Batch specific COAs in our database
Median dispatch time
Orders batch-traceable to certificate
Built for the bench
Why researchers choose GreySyn
Quality, documentation, and price — without asking you to pick two.
Documentation first
Purity, identity, and net content are recorded on a lot-specific COA you can archive with your data.
Best prices, guaranteed
Honest pricing – no fees, no memberships. High purity peptides at a price that respects your budget
Fast and free shipping
Two-day shipping included on every order, no minimum purchase, and we dispatch within 24 hours.
Ready to order with confidence?
Browse the full catalog, review each Certificate of Analysis, and we’ll dispatch your order — usually the same day.
