Briefings on 15 research peptides, practical guides for ordering within the Netherlands, Belgium and Luxembourg, and a new article every day. We sell nothing ourselves: order links go to King Peptides, which sends each lot from the Netherlands with its certificate of analysis.
Each briefing says how the peptide works, how far the evidence goes, from cell dish to licensed medicine, and which doses published studies report. Safety findings and molecular data are included.
Weekly dual agonist built on the GIP sequence. In SURMOUNT-1 the 15 mg arm lost 20.9% of body weight on average over 72 weeks. Authorised in the EU under the name Mounjaro.
Fifteen amino acids taken from a protein described in human gastric juice. In rats it is reported to speed the repair of tendon, muscle and gut. No controlled trial in humans has been published, and one Zagreb group produced most of the work.
Five-residue ghrelin-receptor agonist designed at Novo Nordisk. It triggers a growth hormone pulse while leaving ACTH and cortisol largely alone, the property that set it apart from the earlier GHRPs.
A single weekly peptide aimed at three receptors: GIP, GLP-1 and glucagon. The phase 2 obesity trial reported a mean weight change of -24.2% after 48 weeks on the highest dose. Still investigational, with phase 3 under way.
The reference GLP-1 receptor agonist, with EU authorisations for type 2 diabetes and for weight management. STEP 1 recorded 14.9% mean weight loss at 68 weeks on 2.4 mg a week, against 2.4% on placebo.
Gly-His-Lys carrying a copper ion, found in human plasma in 1973. The amount in blood drops with age. Studies look at collagen synthesis, wound closure and shifts in gene expression; the human data are mostly from products applied to skin.
We are an information site. We hold no stock and take no orders: we read the literature, explain what a certificate should show, and point you to one supplier.
Mechanism, evidence level, doses reported in studies and safety findings for each peptide, with comparison guides for the larger classes.
Learn what an HPLC trace, a mass spectrum and a lot number should look like, so you can judge any supplier’s paperwork yourself.
The shop sends research peptides from the Netherlands with a certificate for the lot: usually 1–2 business days within the Netherlands, 3–5 to Belgium and Luxembourg.
Profiles are filed by the pathway they act on, so that you compare a ghrelin mimetic with another ghrelin mimetic and not with an incretin.
Seven longer reads on the practical side of peptide research in the Benelux: where to order, what the paperwork must show, how to keep a vial and how the classes differ.
A supplier checklist, what a lot certificate has to show, delivery times within the Benelux and the rules to check before you order.
Read the guideWhat each line of a peptide CoA means: the HPLC trace, the mass spectrum, the lot number, and the signs of a recycled certificate.
Read the guideFreezer, fridge or bench: temperatures for powder and solution, working with bacteriostatic water, and how long a vial keeps.
Read the guideWhat a peptide is, how the main classes act on their receptors, why half-life matters, and where medicine ends and research material begins.
Read the guideOne receptor, two or three: how the incretin peptides differ in mechanism, half-life, trial results and regulatory status.
Read the guideSelectivity, appetite, cortisol and fading responses across the ghrelin mimetics, with CJC-1295 and tesamorelin as the GHRH counterpart.
Read the guideShort pieces on peptide research, quality control and the Benelux market, each tied to the published literature. Open the archive →
HPLC and mass spectrometry are essential tools for confirming tirzepatide purity and identity before receptor binding assays. This guide explains retention time profiles, fragmentation patterns and how to interpret certificates of analysis.
Read articleMass spectrometry fragmentation patterns and HPLC retention times create a unique analytical signature for retatrutide, enabling researchers to verify triple-receptor molecular identity and detect impurities before binding experiments.
Read articleAutumn humidity in the Benelux peaks from September to November, creating conditions where lyophilised peptides absorb atmospheric water without upgraded desiccant protection. Learn why standard amber vials fail and how Karl Fischer titration validates storage integrity.
Read articleThey are sold as research material for laboratory and scientific work. Research material is not a medicine and is not meant for human or veterinary use, even when the same molecule is licensed as a medicine elsewhere. National rules and the policies of your institution differ, so check what applies to you before ordering. The Benelux buying guide sets out what to look at.
By the certificate of analysis for that lot. It should show an HPLC purity figure with the chromatogram it came from, a mass spectrum that matches the expected molecular weight, and a lot number that is also on your vial. A percentage without a trace or a lot number proves nothing. Our guide to checking a certificate line by line shows how to read one.
King Peptides sends tracked parcels from the Netherlands. Count on three to five business days for a Belgian or Luxembourg address, against one or two within the Netherlands. All three countries are in the EU, so nothing has to clear customs.
Much of the laboratory work in the Benelux is done in English, by staff and students from many countries. The language menu at the top translates any page into Dutch, French or German. That is machine translation: useful for reading along, but the English text is the reference.
Every order button opens the matching product page at King Peptides, or the closest product when the shop does not list that peptide. 5% discount at checkout with code PEPTIDENBENELUX5. We have a commercial relationship with the shop: orders placed through our links help pay for the site, at no extra cost to you. The About page explains how that works and what it does not influence.
Sent from the Netherlands · HPLC purity 98%+ · certificate per lot · 1–2 business days NL, 3–5 to Belgium and Luxembourg.