{"product_id":"s-23-mastorin-br-50x15mg","title":"S-23 Mastorin\u003c\/br\u003e50x15mg","description":"\u003ch2\u003ePremium Grade | UK Supply | Research SARM | \u0026gt;99% Purity | Worldwide Delivery\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eBatch Documentation-Identity \u0026amp; Purity Control\u003c\/h2\u003e\n\u003cp\u003eBuy SARMs UK from BioPlex Peptides, with a capsule range built around our own raw powder sourcing, selected manufacturing specification, and stronger control over final product quality. Rather than relying on generic ready made stock, BioPlex sources its own raw SARMs powders and has capsules produced in the UK to our chosen specification. This gives us greater control over capsule strength, colour coding, presentation, and batch consistency across the range. Where many sellers offer standard 10mg capsules, BioPlex also offers stronger 15mg capsule specifications on selected lines, helping set our SARMs capsules apart within the UK market.\u003c\/p\u003e\n\u003cp\u003eBy sourcing our own raw powders and controlling how they are manufactured into capsules, we are able to maintain a more consistent standard across our SARMs for sale UK range. This supports clearer product identity, tighter internal control, and a more premium finished capsule compared with many off the shelf alternatives sold online. Our aim is to offer some of the best quality SARMs capsules available to buy online in the UK.\u003c\/p\u003e\n\u003cp\u003eBioPlex also offers trade customers the option to buy SARMs raw powders and arrange capsule production to their own required specification. Through our \u003ca href=\"\/tr\/pages\/wholesale\"\u003e\u003cstrong\u003e\u003cem\u003eTrade Supply Range\u003c\/em\u003e\u003c\/strong\u003e\u003c\/a\u003e and \u003ca href=\"\/tr\/pages\/product-catalogue\"\u003e\u003cstrong\u003e\u003cem\u003eProduct Catalogue Page\u003c\/em\u003e\u003c\/strong\u003e\u003c\/a\u003e, customers can enquire about custom capsule strengths, colour coded capsule options, and tailored production formats to suit their own supply requirements. This gives trade buyers greater flexibility while benefiting from BioPlex sourcing standards and UK based capsule manufacturing support.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eResearch Compound Summary\u003c\/h2\u003e\n\u003cp\u003eS-23 is studied as a selective androgen receptor ligand used to interrogate androgen receptor signalling in controlled experimental systems. The androgen receptor is a nuclear hormone receptor that, when activated by a ligand, can translocate to the nucleus, bind androgen response elements on DNA, and recruit coactivator or corepressor proteins that reshape transcription. In AR expressing cell models, S-23 is used to map ligand driven transcriptional programmes and compare signalling strength, duration, and selectivity versus other reference ligands. Typical approaches include receptor binding and competition assays, AR reporter systems, nuclear localisation imaging, and chromatin occupancy studies, paired with transcript panels such as KLK3, FKBP5, and TMPRSS2 plus broader RNA sequencing readouts.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specification\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSynonyms:\u003c\/strong\u003e Mastorin, S-23, S23, S 23\u003cbr\u003e\u003cstrong\u003eChemical Class:\u003c\/strong\u003e Selective androgen receptor modulator\u003cbr\u003e\u003cstrong\u003eLong Chemical Name:\u003c\/strong\u003e (IUPAC style listing): (2S)-3-(4-chloro-3-fluorophenoxy)-N-[4-cyano-3-(trifluoromethyl)phenyl]-2-hydroxy-2-methylpropanamide.\u003cbr\u003e\u003cstrong\u003eMolecular Weight:\u003c\/strong\u003e 416.75 g\/mol.\u003cbr\u003e\u003cstrong\u003eFormula:\u003c\/strong\u003e C18H13ClF4N2O3\u003cbr\u003e\u003cstrong\u003eContains:\u003c\/strong\u003e 9.99% Mastorin (S-23)\u003cbr\u003e\u003cstrong\u003eCAS\/Batch:\u003c\/strong\u003e OS001-03-2026\u003cbr\u003e\u003cstrong\u003eStorage:\u003c\/strong\u003e Store between 10-15°C\u003cbr\u003e\u003cstrong\u003ePurity:\u003c\/strong\u003e 99.4% documented under batch specific testing\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eRelated Research Compounds\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003e\u003ca href=\"\/tr\/products\/gw-0742-fitorine-br-50x15mg\" style=\"color: #3a8f52; text-decoration: none;\"\u003eGW-0742-Fitorine\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"\/tr\/products\/rad-140-tesolone-br-50x15mg\" style=\"color: #3a8f52; text-decoration: none;\"\u003eRAD-140-Testolone\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"\/tr\/products\/lgd-4033-ligandrol-br-50x15mg\" style=\"color: #3a8f52; text-decoration: none;\"\u003eLGD-4033-Ligandrol\u003c\/a\u003e\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eDisclaimer\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/tr\/policies\/legal-notice\" style=\"color: #3a8f52; text-decoration: none;\"\u003e\u003cstrong\u003e\u003cem\u003eFor research purpose only, Not for human consumption.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"BioPlex Peptides ","offers":[{"title":"Default Title","offer_id":57968080978304,"sku":"(Mastorin)","price":55.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0991\/6783\/0400\/files\/BioPlexBottleMockup-S-23Mastorin15mgCAPSULES-35x70-140426.png?v=1777977458","url":"https:\/\/bioplexpeptides.co.uk\/tr\/products\/s-23-mastorin-br-50x15mg","provider":"BioPlex Peptides ","version":"1.0","type":"link"}