# XL Peptides

> Premium Research-Grade Peptides

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## Sitemaps

- [XML Sitemap](https://xlpeptides.com/sitemap.xml): Contains all public & indexable URLs for this website.

## Posts

- [Blog](https://xlpeptides.com/blog/): With the XL Peptides blog, you can discover everything about using research peptides and buying research peptides in the UK.
- [What Causes Peptides to Degrade?](https://xlpeptides.com/what-causes-peptides-to-degrade/): Learn what causes peptides to degrade in laboratory research, including heat, moisture, light, oxidation, pH changes and poor sample handling.
- [Peptides vs Amino Acids: What's the Difference?](https://xlpeptides.com/peptides-vs-amino-acids-whats-the-difference/): Peptides vs amino acids explained clearly. Learn how peptide bonds, amino-acid residues, sequences and molecular weight distinguish laboratory research materials.
- [Peptide Purity vs Peptide Content: What's the Difference?](https://xlpeptides.com/peptide-purity-vs-peptide-content-whats-the-difference/): Learn the difference between peptide purity vs peptide content, how each is measured, and what to check on a laboratory research peptide COA.
- [Do Peptides Need to Be Refrigerated?](https://xlpeptides.com/do-peptides-need-to-be-refrigerated/): Do peptides need to be refrigerated? Learn how storage temperature, moisture, light and peptide form affect research material stability.
- [What Is Peptide Purity?](https://xlpeptides.com/what-is-peptide-purity/): Learn what is peptide purity, how HPLC and mass spectrometry are used, and how to interpret purity percentages and peptide COAs in laboratory research.
- [How Are Peptides Made? Peptide Synthesis Explained](https://xlpeptides.com/how-are-peptides-made/): Learn how synthetic peptides are made using solid-phase peptide synthesis (SPPS), including amino-acid coupling, purification, HPLC, mass spectrometry and lyophilisation for laboratory research.
- [Peptide Bond Formation: A Simple Guide](https://xlpeptides.com/peptide-bond-formation-a-simple-guide/): Learn how peptide bond formation works during laboratory synthesis, including coupling, protecting groups, common issues, and quality checks.
- [How Long Do Lyophilised Peptides Last?](https://xlpeptides.com/how-long-do-lyophilised-peptides-last/): How long do lyophilised peptides last? Learn how temperature, moisture, oxygen, storage conditions and vial handling affect peptide stability in laboratory research.
- [What Is Solid-Phase Peptide Synthesis (SPPS)?](https://xlpeptides.com/what-is-solid-phase-peptide-synthesis/): Learn what solid-phase peptide synthesis (SPPS) is, how resin, coupling and deprotection work, and how research peptide batches are checked.
- [How Is Peptide Purity Tested? HPLC and Mass Spectrometry Explained](https://xlpeptides.com/how-is-peptide-purity-tested/): Learn how is peptide purity tested using HPLC and mass spectrometry, what purity percentages mean, and how laboratory researchers interpret analytical results.
- [How Long Do Peptides Last at Room Temperature?](https://xlpeptides.com/how-long-do-peptides-last-at-room-temperature/): How long do peptides last at room temperature? Learn how form, moisture, light and sequence affect research peptide storage stability.
- [What Are Lyophilised Peptides?](https://xlpeptides.com/what-are-lyophilised-peptides/): Learn what lyophilised peptides are, how freeze-drying works, and what matters for laboratory storage, sample handling and research preparation.
- [What Is a Peptide Certificate of Analysis (COA)?](https://xlpeptides.com/peptide-certificate-of-analysis/): Learn what a peptide Certificate of Analysis (COA) shows, how to read purity and identity results, and what to check for laboratory research.
- [MOTS-C Stability: What Researchers Need To Know](https://xlpeptides.com/mots-c-stability/): Learn how temperature, moisture, oxidation, solvents and freeze-thaw cycles can affect MOTS-C stability during controlled laboratory storage and research handling.
- [Bacteriostatic Water vs Sterile Water: What’s the Difference?](https://xlpeptides.com/bacteriostatic-water-vs-sterile-water/): Bacteriostatic water vs sterile water explained. Learn the key differences in preservatives, laboratory handling, storage and research preparation.
- [Peptides vs Proteins: What’s the Difference?](https://xlpeptides.com/peptides-vs-proteins-whats-the-difference/): Peptides vs proteins explained simply. Learn how they differ in size, structure, molecular complexity, laboratory handling and research material preparation.
- [PT-141 Reconstitution: Step-by-Step Guide](https://xlpeptides.com/pt-141-reconstitution-step-by-step-guide/): Reconstituting PT-141 should be a controlled laboratory process, not a matter of adding an arbitrary amount of liquid and hoping the material dissolves. The solvent, final concentration, handling method and storage conditions can all affect the consistency of the prepared research solution. A small calculation error or an unsuitable diluent may change the concentration, cause
- [BPC-157 Reconstitution: Step-by-Step Guide](https://xlpeptides.com/bpc-157-reconstitution-step-by-step-guide/): Learn the essentials of BPC-157 reconstitution, including preparation, storage, handling and accuracy for controlled laboratory research.
- [How Long Can Peptides Be Out of the Fridge? Simple Research Storage Guide](https://xlpeptides.com/how-long-can-peptides-be-out-of-the-fridge/): Unsure how long can peptides be out of the fridge? Learn the simple research-only answer for dry and liquid peptide storage.
- [What Is TB-500 Peptide?](https://xlpeptides.com/what-is-tb-500-peptide/): Learn everything about TB-500 peptide, how it differs from thymosin beta-4, its sequence, laboratory research context and key sample checks.
- [Are Peptide Bonds Covalent?](https://xlpeptides.com/are-peptide-bonds-covalent/): Are peptide bonds covalent? Learn how peptide bonds form, why they are classed as amide bonds, and why this matters in research.

## Pages

- [Home](https://xlpeptides.com/): Buy research peptides UK including BPC-157, TB-500, GHK-Cu, and more. High-purity, lab-tested compounds. Fast UK shipping. For research use only.
- [Fraudulent & Imposter Website Warning](https://xlpeptides.com/fake/): XL Peptides warns customers about fraudulent websites, scam sellers, and suspected counterfeit products. Genuine XL Peptides products are only available from www.xlpeptides.com.
- [Research Materials](https://xlpeptides.com/research-materials/): UK RESEARCH PEPTIDE SUPPLIER In-stock research materials, dispatched within 1–2 working days. Every batch is independently tested to 99%+ purity, with a Certificate of Analysis available on request. Browse the full range below. Shop the full range Browse by category Shop by research area Find the right material for your research faster — browse our
- [Research Standards](https://xlpeptides.com/research-standards/): UK RESEARCH MATERIALS SUPPLIER Research materials, supplied to a documented standard. XL Peptides supplies high-purity research materials to laboratories, institutions and qualified researchers across the UK — with controlled storage, batch documentation and a consistent fulfilment process behind every order. Explore research catalogue Learn about XL Peptides SAMPLE SPECIFICATION Minimum purity Verification method Storage Documentation
- [COA Library / Test Results](https://xlpeptides.com/coalibrary/)
- [Newsletter](https://xlpeptides.com/newsletter/): Stay updated with XL Peptides’ latest UK research peptide offers, product news, and expert insights. Join our newsletter for exclusive updates.
- [Reconstituting / Storage](https://xlpeptides.com/reconstituting-storage/): Peptides are increasingly gaining traction in various research fields. It's crucial to understand the ins and outs of peptide storage and reconstitution.
- [Payment Information](https://xlpeptides.com/payment-information/): At XL-Peptides, we prioritize the security and convenience of your transactions. We offer various payment options to ensure a seamless shopping experience.
- [About Us](https://xlpeptides.com/about-us/): At XL Peptides, we are committed to providing our customers with the highest-quality research peptides. Learn here more about our peptide store.
- [Payment/Shipping Quick Info](https://xlpeptides.com/payment-shipping/): We accept all major credit/debit cards including Visa, MasterCard, ApplePay and American Express. There are no additional fees.
- [Contact Us](https://xlpeptides.com/contact-us/): Contact XL Peptides for more information about us, our range of peptides and purchasing research peptides in the UK. Our team is happy to help.
- [Delivery, Shipping & Returns Policy](https://xlpeptides.com/delivery-information/): As soon as your order ships, we will send you a delivery confirmation email with your tracking information. Read our shipping policy for more details.
- [Shop](https://xlpeptides.com/shop/)
- [Cart](https://xlpeptides.com/cart/): Cart [yaycurrency-switcher]
- [Checkout](https://xlpeptides.com/checkout/): Checkout [yaycurrency-switcher]
- [My account](https://xlpeptides.com/my-account/)
- [Research Use Disclaimer](https://xlpeptides.com/research-use-disclaimer/): All products sold by XL Peptides (a trading name of Bio Research Ltd, Company No. 15464334) are for laboratory research purposes only.They are not intended for human or animal use, and must not be used:• In foods, drugs, cosmetics, household items, or any products intended for ingestion, injection, or topical application;• For clinical, diagnostic, therapeutic,
- [Peptides Calculator](https://xlpeptides.com/peptides-calculator/): Calculate the precise dosage of peptides with our easy-to-use peptides calculator. A reliable and free peptide calculator for accurate research purposes.
- [Privacy Policy](https://xlpeptides.com/privacy-policy/): Last Updated: October 30 2025 This Privacy Policy explains how XL Peptides (a trading name of Bio Research Ltd, Company No. 15464334) collects, uses, stores, and protects your personal information when you visit www.xlpeptides.com (the “Site”). Registered Office: Foxhall Business Centre, 2 King Street, Nottingham, NG1 2ASEmail: info@xlpeptides.com We are committed to protecting your privacy
- [Wholesale Peptides](https://xlpeptides.com/wholesale/): As a leading wholesale peptide supplier in the UK, we're revolutionising peptide research at XL Peptides by offering bespoke peptides wholesale solutions.
- [Shop](https://xlpeptides.com/shop/): Shop research peptides in the UK at XL Peptides. XL Peptides is committed to providing our customers with the highest-quality research peptides.
- [FAQs](https://xlpeptides.com/faqs/): The XL Peptides FAQs provide immediate answers to frequently asked questions about peptides, such as how to buy research peptides in the UK and more.
- [Affiliate Program](https://xlpeptides.com/affiliate-program/): XL Peptides affiliate program is free and enables members to earn revenue by placing a link or links on their website which advertises XL Peptides products

## Products

- [Wolverine Peptide Stack | BPC-157 + TB-500 | 2 Vials](https://xlpeptides.com/product/wolverine-stack/): Buy Wolverine peptide stack UK from XL Peptides. Includes 1× BPC-157 and 1× TB-500 in two separate research vials. Not a pre-mixed blend.
- [GLOW Peptide Bundle | 5 Separate Vials](https://xlpeptides.com/product/glow-peptide-blend/): Buy GLOW peptide bundle UK from XL Peptides. Includes 2× BPC-157, 2× TB-500 and 1× GHK-Cu in five separate research vials.
- [KLOW Peptide Bundle | 6 Separate Vials](https://xlpeptides.com/product/klow-peptide-blend/): Buy KLOW peptide bundle UK from XL Peptides. Includes 2× BPC-157, 2× TB-500, 1× GHK-Cu and 1× KPV in six separate research vials.
- [BPC-157 5mg Research Peptide](https://xlpeptides.com/product/bpc-157-5mg/): Buy BPC-157 5mg UK from XL Peptides. BPC-157 research peptide for controlled in-vitro studies. UK stock, fast dispatch. Research use only.
- [TB-500 5mg Research Peptide](https://xlpeptides.com/product/tb-500-5mg/): Buy TB-500 5mg UK from XL Peptides. TB-500 research peptide for controlled in-vitro cell migration and cytoskeletal studies. Research use only.
- [Ipamorelin + CJC-1295 No DAC Bundle | 2 Vials](https://xlpeptides.com/product/ipamorelin-cjc-1295-bundle/): Buy Ipamorelin CJC-1295 bundle UK from XL Peptides. Includes 1× Ipamorelin 5mg and 1× CJC-1295 No DAC 5mg in separate research vials.
- [CJC-1295 No DAC 5mg Research Peptide](https://xlpeptides.com/product/cjc-1295-5mg/): Buy CJC-1295 No DAC 5mg UK from XL Peptides. Research peptide for controlled in-vitro GHRH receptor and GH-axis signalling studies. Research use only.
- [Ipamorelin 5mg Research Peptide](https://xlpeptides.com/product/ipamorelin/): Buy Ipamorelin 5mg UK from XL Peptides. Ipamorelin research peptide for controlled in-vitro GHSR and receptor-signalling studies. Research use only.
- [GHK-Cu 50mg Research Peptide](https://xlpeptides.com/product/ghk-cu-50mg/): Buy GHK-Cu 50mg UK from XL Peptides. GHK-Cu research peptide for controlled in-vitro peptide, copper-binding and matrix studies. Research use only.
- [KPV 10mg Research Peptide](https://xlpeptides.com/product/kpv-10mg/): Buy KPV 10mg UK from XL Peptides. KPV research peptide for controlled in-vitro peptide signalling and structure-activity studies. Research use only.
- [PT-141 10mg Research Peptide](https://xlpeptides.com/product/pt-141-10mg/): Buy PT-141 10mg UK from XL Peptides. PT-141 bremelanotide research peptide for controlled in-vitro melanocortin receptor studies. Research use only.
- [MOTS-c 10mg Research Peptide](https://xlpeptides.com/product/mots-c-10mg/): Buy MOTS-c 10mg UK from XL Peptides. MOTS-c research peptide for controlled in-vitro mitochondrial and metabolic signalling studies. Research use only.
- [Kisspeptin-10 5mg Research Peptide](https://xlpeptides.com/product/kisspeptin-10-5mg/): Buy Kisspeptin-10 5mg UK from XL Peptides. Kisspeptin research peptide for controlled in-vitro KISS1R/GPR54 receptor-signalling studies.
- [SS-31 10mg Research Peptide](https://xlpeptides.com/product/ss-31-10mg/): Buy SS-31 10mg UK from XL Peptides. SS-31 research peptide for controlled in-vitro mitochondrial, cardiolipin and bioenergetic pathway studies.
- [DSIP 10mg Research Peptide](https://xlpeptides.com/product/dsip/): Buy DSIP 10mg UK from XL Peptides. DSIP research peptide for controlled in-vitro neuropeptide signalling and assay studies. Research use only.
- [IGF-1 LR3 1mg Research Peptide](https://xlpeptides.com/product/igf-1-lr3-1mg/): Buy IGF-1 LR3 1mg UK from XL Peptides. IGF-1 research peptide for controlled in-vitro growth-factor, receptor-signalling and metabolic studies.
- [Oxytocin 2mg Research Peptide](https://xlpeptides.com/product/oxytocin-2mg/): Buy Oxytocin 2mg UK from XL Peptides. Oxytocin research peptide for controlled in-vitro OXTR receptor, peptide-signalling and assay studies.
- [HGH Fragment 176-191 5mg Research Peptide](https://xlpeptides.com/product/hgh-frag-176-191-5mg/): Buy HGH Frag 176-191 5mg UK from XL Peptides. HGH Fragment research peptide for controlled in-vitro peptide-fragment and signalling studies.
- [Peptide Vial Holder for 3ml Glass Vials](https://xlpeptides.com/product/3ml-peptide-fridge-vial-holder/): A Peptide Fridge Vial Holder used for securely holding upto 7x 3ml glass water mixing vials keeping them organised and within easy reach.
- [Epitalon — 10 Vial Bundle](https://xlpeptides.com/product/epitalon-bundle/): Buy Epitalon 10-vial bundle UK from XL Peptides. Includes 10 separate 10mg vials, commonly associated online with the Epitalon Russian protocol.
- [Epitalon 10mg Research Peptide](https://xlpeptides.com/product/epitalon-10mg/): Buy Epitalon 10mg UK from XL Peptides. Epitalon research peptide (Epitalon AEDG) for controlled in-vitro telomere and peptide-signalling studies.
- [NAD+ 500mg Research Compound](https://xlpeptides.com/product/nad-500mg/): Buy NAD+ 500mg UK from XL Peptides. NAD+ research compound for controlled in-vitro redox, metabolic and cofactor-dependent pathway studies.
- [GHRP-6 10mg Research Peptide](https://xlpeptides.com/product/ghrp-6-10mg/): Buy GHRP-6 10mg UK from XL Peptides. GHRP-6 research peptide for controlled in-vitro GHSR-1a receptor, ghrelin-signalling and assay studies.
- [5-Amino-1MQ 10mg Research Compound](https://xlpeptides.com/product/5-amino-1mq-10mg/): Buy 5-Amino-1MQ 10mg UK from XL Peptides. Small-molecule research compound for controlled in-vitro NNMT and NAD+-linked metabolic pathway studies.
- [AOD-9604 5mg Research Peptide](https://xlpeptides.com/product/aod-9604/): Buy AOD-9604 5mg UK from XL Peptides. AOD-9604 research peptide for controlled in-vitro peptide-fragment, signalling and assay studies.
- [SLU-PP-332 5mg Research Compound](https://xlpeptides.com/product/slu-pp-332-5mg/): Buy SLU-PP-332 5mg UK from XL Peptides. SLU-PP-332 research compound and ERR agonist for controlled in-vitro signalling studies. Research use only.
- [FOXO4-DRI 10mg Research Peptide](https://xlpeptides.com/product/foxo4-dri/): Buy FOXO4-DRI 10mg UK from XL Peptides. FOXO4 research peptide for controlled in-vitro FOXO4-p53 interaction and senescence-pathway studies.
- [Peptide Vial Holder for 10ml Glass Vials](https://xlpeptides.com/product/peptide-vial-holder-for-10ml-glass-vials/): A Peptide Fridge Vial Holder used for securely holding upto 7x 10ml glass water mixing vials keeping them organised and within easy reach.

## Categories

- [Peptides](https://xlpeptides.com/category/peptides/)

## Product categories

- [Peptides](https://xlpeptides.com/product-category/peptides/)
- [Misc](https://xlpeptides.com/product-category/misc/)
- [Bundles](https://xlpeptides.com/product-category/bundles/): Coming soon…

## Product tags

- [Misc](https://xlpeptides.com/product-tag/misc/)
- [peptides](https://xlpeptides.com/product-tag/peptides/)
- [AOD](https://xlpeptides.com/product-tag/aod/)
- [AOD-9604](https://xlpeptides.com/product-tag/aod-9604/)
- [Bundles](https://xlpeptides.com/product-tag/bundles/)
- [5amino](https://xlpeptides.com/product-tag/5amino/)
- [5amino1mq](https://xlpeptides.com/product-tag/5amino1mq/)
- [ss31](https://xlpeptides.com/product-tag/ss31/)