Precision peptides
for lean research.
High-purity lyophilized powders for metabolic and weight-management research. Every vial is third-party verified and ships with a Certificate of Analysis. Purity you can actually measure.
Why PeptiLean
Research-grade, without compromise.
≥99% Purity
Every batch verified by HPLC and mass spectrometry before it ships.
Lyophilized
Freeze-dried for maximum stability and a long, reliable shelf life.
Third-Party COA
A Certificate of Analysis is included with every single order.
Cold-Chain
Temperature-controlled, discreet shipping to protect potency.
Featured Peptides
Studied for metabolism & weight
Tirzepatide 40mg
A dual mechanism of action regulates metabolism, significantly reduces body weight, and improves insulin…
NAD+ 500mg
Participates in energy metabolism processes, maintains normal cellular function, and may possess anti-aging effects.…
BPC157 5mg
Accelerates wound and tissue healing, protects gastrointestinal mucosa, and promotes tendon and ligament repair.…
WA3
Dissolves peptide-based medications; serves as a sterile injection vehicle, ensuring injection safety.
Tirzepatide 20mg
A dual mechanism of action regulates metabolism, significantly reduces body weight, and improves insulin…
Handling
Reconstitute in three steps
A quick guide for the lab. Always follow your institution's protocols and handle under sterile conditions.
Add solvent
Slowly draw bacteriostatic water down the vial wall onto the lyophilized powder.
Swirl gently
Let it dissolve on its own or swirl gently — do not shake — until fully clear.
Store cold
Label, then refrigerate at 2–8°C. Keep away from light and use within protocol.
Verified reviews
Trusted by researchers
"The COA matched our own HPLC run to the decimal. Reconstitution was clean with no residue. This is now our default supplier."
"Vials arrive cold, sealed, and properly labeled every time. Consistency batch-to-batch is exactly what I need for repeatable studies."
"Fast, discreet shipping and responsive support. Purity has been excellent across every compound we have ordered."
Are these products for human use?
No. All peptides are sold strictly for laboratory and research use only. They are not dietary supplements, drugs, or intended for human or veterinary consumption.
How do you verify purity?
Every batch is analyzed by HPLC and mass spectrometry. A Certificate of Analysis (COA) reflecting purity and mass is included with each order.
Which peptides relate to weight and metabolism?
Compounds such as Semaglutide, Tirzepatide, Retatrutide, AOD-9604 and Tesamorelin are widely studied in metabolic and weight-management research. We provide reference data, not usage guidance.
How should I store lyophilized peptides?
Keep unopened lyophilized vials cold and away from light. Once reconstituted, refrigerate at 2–8°C and use within the timeframe defined by your protocol.
How fast is shipping?
In-stock orders ship within 24 hours via temperature-controlled, discreet courier. Most domestic orders arrive in 2–4 business days with tracking.
Start your research with confidence.
$20 off your first order and a COA with every vial. Purity you can measure — shipped cold to your door.