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The Standard for Research-Grade Peptides

High-purity, third-party tested peptides — prepared for laboratory and scientific study. Trusted quality, discreet USPS Priority shipping, and a Certificate of Analysis behind every batch.

Shop the Catalog → Shop Retatrutide – 25% Off

99% Verified Purity

13+ Research Compounds

1–2d USPS Priority

HPLC Verified

Lyophilized · Sealed

99% Purity

HPLC verified

Fast Shipping

USPS Priority

Third-Party Tested

Independent labs

Lab-Grade

Lyophilized, sealed

Minimum Purity Standard

Compounds in Catalog

Typical Dispatch Window

Batches With a COA

Explore the Catalog

Research Compounds by Category

Every compound is supplied as lyophilized powder for laboratory research and analytical study.

Metabolic Research

Studied for energy and metabolic signaling pathways.

Retatrutide · Tirzepatide · MOTS-C · Tesamorelin

Repair & Structural

Investigated for tissue and cellular repair mechanisms.

BPC-157 · TB-500 Blend · GHK-Cu · Glow

Cognitive & Neuro

Studied for neurological signaling and receptor interaction.

Selank · Semax

Lab Supplies

Reconstitution and handling essentials for the bench.

Bacteriostatic Water · Sterile Water · Guide Book

Best Sellers

Featured Research Peptides

99% Pure

Repair & Structural

BPC-157 10mg

Lyophilized · Research use only

$45.00 ~~$60.00~~ +

99% Pure

Repair & Structural

GHK-Cu 50mg

Lyophilized · Research use only

$35.00 +

99% Pure

GLOW research peptide blend vial - tissue repair research compound

Repair & Structural

Glow 70mg

Lyophilized · Research use only

$100.00 ~~$120.00~~ +

99% Pure

Repair & Structural

Bacteriostatic Water 10ml

Lyophilized · Research use only

$15.00 +

View All 13 Products →

Simple & Secure

How to Pay

Ordering takes three easy steps. No complicated checkout — just a quick, secure manual payment.

Place Your Order

Add your research compounds to the cart and complete checkout with your shipping details.

Pay Securely

Send payment via Shop Pay, Apple Pay, Google Pay, Credit, Debit, Venmo or CashApp. You'll receive simple instructions and a confirmation right after ordering.

Fast Dispatch

Your order ships via USPS Priority within 1–2 business days, in discreet, protective packaging.

Questions about payment? Read the full How to Pay guide →

The King's Standard

Why Researchers Choose Us

Built for people who take their research seriously — and expect the same from their supplier.

Verified Purity

Every compound is sourced to a 99% purity standard and backed by third-party HPLC and mass-spec testing, with a Certificate of Analysis available per batch.

Discreet, Fast Fulfilment

Orders ship domestically via USPS Priority in protective packaging, so your research materials arrive quickly and intact.

Real Support

Direct, responsive support before and after your order — plus clear guidance on payment, handling, and documentation.

Certificate of Analysis · Library ● 99%+ Verified

Retatrutide 10mg

Batch KC-RETA-0426 · HPLC · MS

View PDF

BPC-157 10mg

Batch KC-BPC-0426 · HPLC · MS

View PDF

Tirzepatide 30mg

Batch KC-TIRZ-0426 · HPLC · MS

View PDF

Transparency First

Every Batch, Documented.

We publish a Certificate of Analysis for every compound we carry — organised by product and batch, not buried in random file uploads. Confirm identity, purity, and molecular data before you ever open a vial.

Independent HPLC and mass-spectrometry results verify what's on the label. If a batch number doesn't match its COA, we want to hear about it.

Browse the COA Library →

Research Library

Learn Before You Order

Neutral, science-first overviews to support informed research decisions. Purely educational — no medical advice or dosing.

Fundamentals

What Are Research Peptides?

A plain-language overview of peptides, how they function as signaling molecules, and why they're studied in laboratory settings.

Read Overview →

Handling

Reconstitution & Storage

Best practices for preparing, storing, and handling lyophilized peptides to preserve stability and purity on the bench.

Read Guide →

Support

Frequently Asked Questions

How do I pay for my order? +

We currently accept Credit, Debit, Shop pay, Google pay, Apple Pay, Venmo and CashApp. After you place an order, you'll receive simple payment instructions and confirmation. See our "How to Pay" section for the full step-by-step walkthrough.

Are your compounds third-party tested? +

Yes. Every compound is supplied to a 99% purity standard and backed by independent HPLC and mass-spectrometry testing. A Certificate of Analysis is available for each batch in our COA Library.

How quickly do orders ship? +

Orders are fulfilled via USPS Priority Mail and typically ship within 1–2 business days, in discreet, protective packaging.

What does "research use only" mean? +

All products are intended strictly for in-vitro laboratory research and analytical study. They are not for human or veterinary use, and nothing on this site is medical advice. You must be 18+ to purchase.

Legal Disclaimer

King's Compounds products are intended for research purposes only. They are not intended for human consumption, diagnostic, therapeutic, or any other medical use. All products are strictly for in-vitro and laboratory research use only.

These statements have not been evaluated by the Food and Drug Administration (FDA). These products are not intended to diagnose, treat, cure, or prevent any disease or medical condition.

By accessing this site and purchasing our products, you confirm that you are 18 years of age or older. This site is restricted to adults only.

No Refund Policy: All sales are final. Due to the nature of our products, we do not accept returns or issue refunds once an order has been placed and processed. If you believe there is an error with your order, please contact us within 48 hours of receipt.

This website and its contents are not intended to provide medical advice. Always consult a qualified healthcare professional before making any health-related decisions.