Seattle Peptide Supply
Research peptides without the noise.
Full transparency from sourcing to COA. Fast nationwide shipping. Same-day delivery throughout Seattle. No hype, no shortcuts.
Why Seattle Peptide Supply
Most compete on gloss
and price.
We compete
on proof and practice.
Lot-by-lot verification
Every lot independently tested. The COA matches the vial.
Lot-by-lot verification
Every lot independently tested. The COA matches the vial.
Curated catalog
Each compound earns its slot. No filler. No hype listings.
Operator-led
Built for buyers who care what's in the vial—and who stands behind it.
Curated by purpose
Find your focus.
Selected compounds
The research shelf.
-
Weight Management
Tirzepatide
Research-grade Tirzepatide 5 mg, supplied as a catalog reference material for laboratory…
HPLC verified · Lot verifiedPrice range: $45.00 through $215.00Select options This product has multiple variants. The options may be chosen on the product page View this lot → -
Performance
HGH 191AA
Research-grade HGH 191AA 10 IU, supplied as a catalog reference material for…
HPLC verified · Lot verifiedPrice range: $32.00 through $450.00Select options This product has multiple variants. The options may be chosen on the product page View this lot → -
Longevity
Thymosin Alpha-1
Research-grade Thymosin Alpha-1 5 mg, supplied as a catalog reference material for…
HPLC verified · Lot verifiedPrice range: $45.00 through $72.00Select options This product has multiple variants. The options may be chosen on the product page View this lot →
Quality process
We test what we sell. We document every lot.
01
Receipt
Lot logged on intake.
Each batch enters a defined chain of custody from the moment it arrives. Documented, timestamped, sealed.
02
Assay
Identity confirmed. Purity quantified.
Independent HPLC testing against reference standards. Identity matches the vial. Purity matches the certificate.
03
Documentation
Certificate written and signed.
Results are recorded on the COA, attributed, dated, and archived. One document per lot.
05
Release
Lot ships with its paper.
The COA travels with the product—and stays searchable by lot, compound, or date.
Independent · Third-party tested
Verified
Lot
SPS-2612-0184
Compound
BPC-157
Identity
Confirmed
Purity (HPLC)
99.1%
Endotoxin
< 0.5 EU/mg
Residual solv.
Pass
Date tested
2026.07.10
Analyst
L. Chen
Quality process
Speak with a peptide professional
Book a Zoom consultation for product education, sourcing guidance, and research-use best practices—set up for how labs and clinics actually run.
Zoom consultations
30–60 minute sessions with calendar confirmation and a secure meeting link.
Same-day Seattle delivery
Local fulfillment for eligible metro orders placed before 1 PM.
What buyers say
Nothing assumed. Everything verified.
That's what earns the next order.
FAQ
Direct answers.
Shipping, testing, consultations, and research-use clarity—without the runaround.
No. All products sold by Seattle Peptide Supply are intended strictly for laboratory and research use only. They are not FDA-approved for human consumption, diagnosis, treatment, or prevention of any disease.
Yes. Orders placed before 1:00 PM local time for Seattle metro ZIP codes are eligible for same-day delivery. You will see eligibility at checkout based on your shipping address.
Most U.S. orders ship within 1 business day via tracked carriers. Standard delivery is 2–5 business days depending on destination. Expedited options are available at checkout.
Unopened products in original packaging may be eligible for return within 14 days of delivery. Due to the nature of research materials, opened vials cannot be returned. Contact support to initiate a return authorization.
Browse the Shop, add products to your cart, and complete checkout with a secure payment method. Create an account to track orders, save wishlists, and access order history.
A note from the team
Built the right way—for Seattle and beyond.
Peptides are a category often sold like a fad. The science is older. The need for clear sourcing is real.
Seattle Peptide Supply exists to bring a premium, transparent standard to research peptide commerce—third-party testing, careful fulfillment, same-day local delivery, and professionals you can actually reach.
The catalog is curated. The answers are direct. When you reach out, you reach a team that stands behind the work.
Seattle Peptide Supply
We test what we sell.
We sell what we test.
We document every lot.
Ready to experience premium peptide supply—with nationwide
shipping and same-day Seattle delivery.