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Research guides

Buying, verifying, storing and combining peptides

The practical questions, answered at length: where to order, what a certificate has to show, how to keep a vial, and how the classes differ. Every guide links to the profiles it mentions.

Buying guide9 min read
Buying Research Peptides in the Netherlands, Belgium and Luxembourg

A supplier checklist, what a lot certificate has to show, delivery times within the Benelux and the rules to check before you order.

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Quality8 min read
Checking a Certificate of Analysis, Line by Line

What each line of a peptide CoA means: the HPLC trace, the mass spectrum, the lot number, and the signs of a recycled certificate.

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Bench protocol8 min read
Storage and Reconstitution: A Bench Protocol

Freezer, fridge or bench: temperatures for powder and solution, working with bacteriostatic water, and how long a vial keeps.

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Fundamentals8 min read
Research Peptides Explained: From Amino Acid to Assay

What a peptide is, how the main classes act on their receptors, why half-life matters, and where medicine ends and research material begins.

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Comparison8 min read
Semaglutide, Tirzepatide and Retatrutide Compared

One receptor, two or three: how the incretin peptides differ in mechanism, half-life, trial results and regulatory status.

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Comparison8 min read
GH Secretagogues Compared: Ipamorelin, GHRP-2, GHRP-6 and Hexarelin

Selectivity, appetite, cortisol and fading responses across the ghrelin mimetics, with CJC-1295 and tesamorelin as the GHRH counterpart.

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Advanced7 min read
Peptide Combinations: What Is Studied Together and Why

The reasoning behind GHRH plus ghrelin mimetic and BPC-157 plus TB-500, and the evidence that combination studies still lack.

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DailyResearch blog
A new research article every day

Short, sourced reads on peptide science, quality control and the European market.

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Research peptides with the paperwork to match.

Sent from the Netherlands · HPLC purity 98%+ · certificate per lot · 1–2 business days NL, 3–5 to Belgium and Luxembourg.

Order at King Peptides Research use only · no customs inside the EU