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Featured protocol
GLP-3: our most powerful weight-loss protocol.
Clinical study
24%body-weight lost in year one
In the Phase 3 TRIUMPH-1 trial, adults averaged 24% body-weight loss in the first year — most of it in the early months — and nearly half lost 30% or more.
Front-loaded · TRIUMPH-1
~70% of year-one weight loss lands in the first 6 months.
Average body-weight lost (%)
Hatter LabsMonths on protocolRetatrutide 12 mg · first year
Data from the Phase 3 TRIUMPH-1 trial of retatrutide (12 mg, n=2,339): ~24% mean body-weight loss in the first year, rising to ~28% by week 80, vs −3.9% placebo. Individual results vary; all protocols require physician approval.
How it works
From your first goal to your first dose — one guided path.
Pharmaceutical Grade
Quality You Can Trust
All peptides are manufactured under strict current Good Manufacturing Practices (cGMP) and in accordance with FDA CFR Title 21 guidelines. Every batch is third-party tested for purity >98%, potency, and the absence of contaminants.
GMP Certified
All peptides synthesized in FDA-registered, GMP-compliant facilities
COA Verified
Every batch includes a Certificate of Analysis for full transparency
>98% Purity
RP-HPLC and mass spectrometry verified purity exceeding 98%
USP Standards
Meets or exceeds U.S. Pharmacopeia quality standards
Fast Shipping
Ships within 48 hours with temperature-controlled packaging
Nationwide
Available in all 50 states, Puerto Rico & US territories
The Difference
Why Choose Hatter Labs?
Not all peptide providers are equal. See how we compare.
Hatter Labs
Research Sites
Physician-supervised protocols
Pharmaceutical-grade purity
Unknown
Third-party COA testing
Personalized dosing
GMP-certified compounding
Ongoing monitoring
Multi-peptide stacking
DIY risk
Pricing
Pay as you go, or join and save.
No membership required to order. Every order — member or not — is reviewed and approved by a licensed physician.
Pay as you go
No commitment. Order when you want.
$0/month
Peptides at list price
- Physician review & approval included
- Buy any peptide at list price
- Member portal & dosing guidance
- No recurring fee — pay only for what you order
Best value
Hatter Labs Membership
Member pricing + perks. Pays for itself fast.
$39/month
$468 billed annually
- Licensed physician oversight & protocol approval
- Member pricing on every peptide
- Personalized dosing & stacking guidance
- Member portal — education & progress tracking
- Modify, pause, or skip anytime
- On-demand lab testing at member rates
- Priority physician support
One membership. Physician-guided peptide therapy, member pricing on everything.
Protocol Builder
Find Your Protocol
Select your goal and experience level to see a recommended peptide stack.
1. Choose your goal
2. Your experience level
Got Questions?