# NEXCELL > Precision in research. Possibility in discovery. ## Posts - [Vial or pen: choosing a format for your lab](https://nexcell.co.uk/vial-or-pen-choosing-a-format/): Every NEXCELL research peptide comes as a vial or a pen, in single units or packs of 10. How the formats differ, and how to choose for your workflow. - [Reconstituting lyophilised peptides: the concentration maths](https://nexcell.co.uk/reconstitution-the-concentration-maths/): Concentration is just amount divided by volume. A worked example, the two formulas you need, and good handling practice for lyophilised research peptides. - [How to read a certificate of purity](https://nexcell.co.uk/how-to-read-a-certificate-of-purity/): Batch number, method, identity and purity: what each line on a certificate of purity tells you, and how to match it to the vial on your bench. ## Pages - [Create an account](https://nexcell.co.uk/register/): /* NEXCELL My Account enhancements: auth views (log in / sign up / reset password), profile header, dashboard tiles. - [Calculator](https://nexcell.co.uk/calculator/) - [Shipping & Delivery](https://nexcell.co.uk/shipping/): Across the United Kingdom. We don't currently ship internationally. - [Refund & Returns Policy](https://nexcell.co.uk/refund-returns/): Research materials are storage-sensitive, so we can't accept returns of products that have been opened, used or stored outside our recommended conditions. - [Privacy Policy](https://nexcell.co.uk/privacy-policy/): NEXCELL ("NEXCELL") is responsible for the personal data collected on nexcell.co.uk. - [Terms & Conditions](https://nexcell.co.uk/terms/): These terms apply to every order placed on nexcell.co.uk ("the Site"), operated by NEXCELL, Unit 1, Sample Business Park, London EC1A 1AA, United Kingdom, company number 00000000 ("NEXCELL", "we", "us"). - [Support](https://nexcell.co.uk/support/) - [My account](https://nexcell.co.uk/my-account/): /* NEXCELL My Account enhancements: auth views (log in / sign up / reset password), profile header, dashboard tiles. - [Checkout](https://nexcell.co.uk/checkout/) - [Cart](https://nexcell.co.uk/cart/) - [Shop](https://nexcell.co.uk/shop/) - [Journal](https://nexcell.co.uk/journal/) - [Research Use Policy](https://nexcell.co.uk/research-use-policy/): NEXCELL supplies peptides and research compounds for in-vitro laboratory research only. - [Quality](https://nexcell.co.uk/quality/) - [About](https://nexcell.co.uk/about/) - [Home](https://nexcell.co.uk/) ## Products - [Tirzepatide 40 mg Pen](https://nexcell.co.uk/product/tirzepatide-40-mg-pen/) - [Tirzepatide 40 mg Vial](https://nexcell.co.uk/product/tirzepatide-40-mg-vial/) - [BPC (10 mg) + TB (10 mg) – 20 mg Pen](https://nexcell.co.uk/product/bpc-10-mg-tb-10-mg-20-mg-pen/) - [BPC (10 mg) + TB (10 mg) – 20 mg Vial](https://nexcell.co.uk/product/bpc-10-mg-tb-10-mg-20-mg-vial/) - [Pre-injection wipes – 100 pack](https://nexcell.co.uk/product/pre-injection-wipes-100-pack/) - [test product - color](https://nexcell.co.uk/product/test-product-color/) - [Glutathione](https://nexcell.co.uk/product/glutathione/): A tripeptide (γ-glutamyl-cysteinyl-glycine) used in oxidative-stress and cellular research models. - [Tesamorelin](https://nexcell.co.uk/product/tesamorelin/): A synthetic analogue of growth-hormone-releasing hormone (GHRH), studied in endocrine and GH-axis research models. - [IGF-1 LR3](https://nexcell.co.uk/product/igf-1-lr3/): A long-acting analogue of insulin-like growth factor 1 (IGF-1), used in cell-culture and growth-factor research. - [GLOW](https://nexcell.co.uk/product/glow/): A NEXCELL research blend of GHK-Cu, TB-500 and BPC-157, studied together in tissue-repair and skin-model research. - [Retatrutide](https://nexcell.co.uk/product/retatrutide/): A synthetic peptide agonist of the GIP, GLP-1 and glucagon receptors, studied in metabolic and energy-balance research models. - [Bacteriostatic Water](https://nexcell.co.uk/product/bacteriostatic-water/): Sterile water with 0.9% benzyl alcohol for reconstituting lyophilised research peptides. - [NAD+](https://nexcell.co.uk/product/nad/): Nicotinamide adenine dinucleotide, a coenzyme central to cellular energy and sirtuin research. - [MOTS-c](https://nexcell.co.uk/product/mots-c/): Mitochondria-derived peptide used in metabolic-homeostasis and exercise-physiology research. - [Selank](https://nexcell.co.uk/product/selank/): Synthetic analogue of tuftsin studied in stress-response and anxiolytic research models. - [Semax](https://nexcell.co.uk/product/semax/): Heptapeptide analogue of an ACTH fragment, used in neuroprotection and cognition research. - [GHK-Cu](https://nexcell.co.uk/product/ghk-cu/): Copper-binding tripeptide studied in skin, collagen and extracellular-matrix research. - [TB-500](https://nexcell.co.uk/product/tb-500/): Synthetic fragment of thymosin beta-4, studied for its role in actin regulation and cell migration. - [BPC-157](https://nexcell.co.uk/product/bpc-157/): A 15-amino-acid synthetic peptide fragment widely used in tissue-repair and gastrointestinal research models. ## Optional - [Agent (MCP protocol)](websites-agents.hostinger.com/nexcell.co.uk/mcp) [comment]: # (Generated by Hostinger Tools Plugin)