Research-Grade Peptides

Lab-Tested Peptides of the Highest Purity

Research-grade peptides with ≥99% purity, verified by independent labs. Reliable shipping across the US with tracking.

≥99%

Lab Tested & Certified

Retatrutide for high-standard research workflows

Retatrutide is our featured product for teams that prioritize documented quality, transparent testing standards, and dependable availability.

Batch-specific CoA documentation for traceable quality control
Lab-tested purity focused on consistent research outcomes
Reliable, trackable shipping for predictable study timelines

View Retatrutide Open peptide directory

Retatrutide

Our Most Popular Peptides

Current highlights for the US market.

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Tirzepatide

Peptides

5.0(1)

$139.99

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Glow(GHK-Cu 50mg, TB500 10mg, BPC157 10mg)

Build Your Peptide Stack

Combine peptides, analyze synergies, and add your custom stack to cart.

Open Stack Builder

Why Bergdorf Bioscience

What sets us apart from the competition.

Lab-Tested

≥99% purity verified

Partner program

For creators, B2B & influencers — commission on referred orders

Secure Payment

SSL-encrypted checkout

Refer friends

Earn rewards or credit when friends order via your link

Decades of peptide research, every batch independently verified.

What Our Customers Say

Trusted by researchers and labs worldwide.

Exceptional purity and reliable delivery. This is now my go-to supplier for all research peptides.

Dr. M. K.

Scientist, University Hospital

Reliable quality batch after batch. The CoA documentation is thorough and professional.

S. R.

Lab Technician, Pharmaceutical Lab

Great selection and competitive pricing. The careful packaging gives me confidence in product integrity.

D. W.

Biotech Researcher, Research Institute

Frequently Asked Questions

Everything you need to know about our peptides and service.

What are peptides and what do they do?

Peptides are short chains of amino acids that act as natural messengers in the body, regulating vital processes such as growth, repair, and metabolism. They can support muscle growth, fat loss, skin health, and tissue regeneration by stimulating the body's own biological functions.

What is the purity level of your peptides?

All our peptides meet a minimum purity standard of ≥99%, verified through HPLC and mass spectrometry analysis.

Do you offer Certificates of Analysis (CoAs)?

Yes. Certificates of Analysis are available for all products and are provided upon request.

Where are your peptides manufactured?

Our peptides are produced in GMP-compliant laboratories using high-quality raw materials to ensure consistency and purity.