{"title":"Peptides for Libido \u0026 Sexual-Health Research","description":"\u003cstyle\u003eheader.purist-hero{display:none!important}.pp-intro{background:#fff!important;padding:0!important}.pp-intro .pp-wrap{max-width:none!important;margin:0!important;padding:0!important;text-align:left!important}.pp-intro .pp-kicker,.pp-intro .pp-trust{display:none!important}.pp-body{background:#fff!important;padding:0!important}.pp-body .pp-wrap{max-width:none!important;margin:0!important;padding:0!important}.pp-body .pp-cta,.pp-faqwrap:empty{display:none!important}.px-cut{display:none!important}\n.px{--nv:#0d2233;--tl:#3a9ab5;--ink:#1f2937;--mut:#5b6b7a;--ln:#e3e8ee;--sf:#f5f8fa;font-family:Montserrat,-apple-system,sans-serif;color:var(--ink);line-height:1.6}.px *{box-sizing:border-box}.px h1,.px h2,.px h3,.px h4{color:var(--nv)!important;font-weight:800;line-height:1.15;margin:0 0 14px;padding:0;border:0}.px p,.px li,.px td,.px th,.px div,.px span{color:var(--ink)}.px a{color:#0d6c8a;text-decoration:none}.px ul{list-style:none;padding:0;margin:0}.px ul li{background:none;border:0;border-radius:0;padding:0}.px img{max-width:100%;height:auto}.px-full{width:100%;background:#fff}.px-in{max-width:1180px;margin:0 auto;padding:0 24px}.px-kick{color:var(--tl)!important;font-size:12px;letter-spacing:2.16px;text-transform:uppercase;font-weight:600;margin:0 0 12px}.px-crumb{font-size:12.5px;color:var(--mut)!important;margin:0 0 18px}.px-crumb a{color:var(--mut)!important}.px-crumb span{margin:0 6px;opacity:.6}\n.px-hero{padding:44px 0 52px}.px-g2{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}.px-hero h1{font-size:42px;margin-bottom:16px}.px-lede{font-size:16.5px;color:var(--mut)!important;max-width:580px;margin:0}.px-ticks{display:flex;flex-wrap:wrap;gap:12px 26px;margin:26px 0 28px}.px-ticks li{font-size:13.5px;font-weight:600;color:var(--nv)!important}.px-ticks li:before{content:\"\\2713\";color:var(--tl);font-weight:800;margin-right:7px}.px-btns{display:flex;flex-wrap:wrap;gap:12px}.px-b1,.px-b2{display:inline-block;padding:15px 28px;border-radius:6px;font-size:15px;font-weight:600;text-decoration:none}.px-b1{background:var(--nv);color:#fff!important}.px-b2{background:#fff;color:var(--nv)!important;border:1px solid var(--ln)}.px-img{width:100%;border-radius:14px;display:block;box-shadow:0 18px 40px rgba(13,34,51,.13)}\n.px-stats{background:var(--nv)!important;padding:28px 0}.px-stats .px-in{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}.px-stats b{display:block;color:#fff!important;font-size:26px;font-weight:800;line-height:1.1}.px-stats i{color:#a9c3d2!important;font-size:11.5px;letter-spacing:1.1px;text-transform:uppercase;font-weight:600;font-style:normal;display:block;margin-top:4px}\n.px-sec{padding:58px 0}.px-alt{background:var(--sf)!important}.px-sec h2{font-size:29px}.px-sub{color:var(--mut)!important;max-width:780px;margin:0 0 28px;font-size:15.5px}.px-sec p{font-size:15.5px}\n.px-cc{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.px-cc1{grid-template-columns:repeat(2,1fr);max-width:600px}.px-card{background:#fff;border:1px solid var(--ln);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 2px 10px rgba(13,34,51,.05)}.px-card img{width:100%;aspect-ratio:1\/1;object-fit:cover;background:var(--sf);display:block}.px-cbody{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}.px-card h4{font-size:17px;margin-bottom:4px}.px-mech{font-size:11.5px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--tl)!important;margin-bottom:10px}.px-card .px-cd{font-size:14px;color:var(--mut)!important;margin:0 0 14px}.px-cbody .px-cd+.px-lnk{margin-top:auto}.px-meta{margin-top:auto;font-size:12.5px;color:var(--nv)!important;font-weight:600;border-top:1px solid var(--ln);padding-top:10px;margin-bottom:14px}.px-lnk{display:inline-block;padding:11px 16px;border:1px solid var(--nv);border-radius:6px;color:var(--nv)!important;font-size:13.5px;font-weight:700;text-align:center}\n.px-tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--ln);border-radius:12px;overflow:hidden;box-shadow:0 2px 10px rgba(13,34,51,.05)}.px-tbl th{background:var(--nv)!important;color:#fff!important;text-align:left;font-size:11.5px;letter-spacing:1.2px;text-transform:uppercase;padding:14px 20px;font-weight:700}.px-tbl td{padding:16px 20px;border-top:1px solid var(--ln);font-size:15px;vertical-align:top}.px-tbl td:first-child{color:var(--ink)!important;width:52%}.px-tbl td:last-child{font-weight:600;color:var(--nv)!important}.px-tbl td a{color:var(--nv)!important;border-bottom:1px solid rgba(58,154,181,.5)}\n.px-stk{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;max-width:900px}.px-stkc{display:block;background:#fff;border:1px solid var(--ln);border-radius:12px;padding:24px;box-shadow:0 2px 10px rgba(13,34,51,.05)}.px-stkt{display:block;font-size:18px;font-weight:800;color:var(--nv)!important;margin-bottom:8px}.px-stkd{display:block;font-size:14.5px;color:var(--mut)!important;margin-bottom:14px}.px-stka{display:block;font-size:12.5px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--tl)!important}\n.px-coas{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 24px}.px-coa{display:inline-block;background:#fff;border:1px solid var(--ln);border-radius:8px;padding:11px 15px;font-size:13px;font-weight:700;color:var(--nv)!important}.px-coa em{display:block;font-style:normal;font-size:11px;font-weight:600;color:var(--tl)!important;letter-spacing:.8px;text-transform:uppercase;margin-top:2px}\n.px-faq{max-width:900px;margin:0}.px-ac{background:#fff;border:1px solid var(--ln);border-radius:10px;margin-bottom:12px;overflow:hidden}.px-ac summary{list-style:none;cursor:pointer;padding:18px 54px 18px 22px;position:relative}.px-ac summary::-webkit-details-marker{display:none}.px-ac summary h3{font-size:16.5px;font-weight:700;margin:0;display:inline}.px-ac summary:after{content:\"\";position:absolute;right:24px;top:50%;width:9px;height:9px;border-right:2px solid var(--tl);border-bottom:2px solid var(--tl);transform:translateY(-70%) rotate(45deg);transition:transform .18s}.px-ac[open] summary:after{transform:translateY(-20%) rotate(-135deg)}.px-ac summary:hover{background:var(--sf)}.px-ac .px-ab{padding:0 22px 18px}.px-ac .px-ab p{color:var(--mut)!important;font-size:15px;margin:0}\n.px-rel{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}.px-rel a{background:#fff;border:1px solid var(--ln);border-radius:999px;padding:9px 16px;font-size:13.5px;font-weight:600;color:var(--nv)!important}.px-cta{background:var(--nv)!important;padding:52px 0;text-align:center}.px-cta h2{color:#fff!important;font-size:27px}.px-cta p{color:#a9c3d2!important;max-width:620px;margin:0 auto 24px}.px-note{padding:26px 0 34px;text-align:center}.px-note em{color:var(--mut)!important;font-size:12.5px;font-style:normal}\n.pp-body .px h1,.pp-body .px h2,.pp-body .px h3,.pp-body .px h4{color:#0d2233;border:0;padding:0;margin:0 0 14px;font-weight:800;line-height:1.15}.pp-body .px .px-sec h2{font-size:29px}.pp-body .px .px-cta h2{color:#fff!important;font-size:27px}.pp-body .px p{margin:0;font-size:15.5px;line-height:1.6}.pp-body .px .px-cta p{color:#a9c3d2!important;margin:0 auto 24px}.pp-body .px .px-ac .px-ab p{color:#5b6b7a!important;font-size:15px}.pp-body .px .px-ac summary h3{font-size:16.5px;font-weight:700;margin:0;display:inline}.pp-body .px a{border-bottom:0;font-weight:inherit}.pp-body .px .px-tbl td a,.pp-body .px .px-tbl td a:hover{color:#0d2233!important;font-weight:700;border-bottom:1px solid rgba(58,154,181,.5)}.pp-body .px .px-cbody .px-cd+.px-lnk{margin-top:auto}.pp-body .px .px-lnk,.pp-body .px .px-lnk:hover{border:1px solid #0d2233;color:#0d2233!important;font-weight:700}.pp-body .px .px-coa,.pp-body .px .px-coa:hover{border:1px solid #e3e8ee;color:#0d2233!important;font-weight:700}.pp-body .px .px-rel a,.pp-body .px .px-rel a:hover{border:1px solid #e3e8ee;color:#0d2233!important;font-weight:600}.pp-body .px .px-b2{border:1px solid #e3e8ee;color:#0d2233!important;font-weight:600}.pp-body .px .px-stkc,.pp-body .px .px-stkc:hover{border:1px solid #e3e8ee}.pp-body .px .px-stkc .px-stkt{color:#0d2233!important}.pp-body .px .px-stkc .px-stka{color:#3a9ab5!important}.pp-body .px ul,.pp-body .px ul li{background:none;border:0;padding:0;border-radius:0}.pp-body .px em{color:#5b6b7a;font-size:inherit}.pp-body .px .px-coa em{color:#3a9ab5!important;font-size:11px;font-weight:600}.pp-body .px .px-note em{font-size:12.5px}\n@media(max-width:1000px){.px-cc{grid-template-columns:repeat(2,1fr)}}@media(max-width:900px){.px-g2{grid-template-columns:1fr;gap:28px}.px-hero h1{font-size:30px}.px-stats .px-in{grid-template-columns:repeat(2,1fr);gap:20px}.px-sec{padding:42px 0}.px-sec h2,.pp-body .px .px-sec h2{font-size:23px}.px-tbl td:first-child{width:auto}}@media(max-width:560px){.px-cc,.px-cc1{grid-template-columns:1fr;max-width:none}.px-hero{padding:28px 0 36px}.px-hero h1{font-size:27px}}\n\u003c\/style\u003e\n\u003cdiv class=\"px px-top\"\u003e\n\u003cdiv class=\"px-full px-hero\"\u003e\u003cdiv class=\"px-in px-g2\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"px-crumb\"\u003e\n\u003ca href=\"\/\"\u003eHome\u003c\/a\u003e\u003cspan\u003e\/\u003c\/span\u003e\u003ca href=\"\/collections\"\u003eCollections\u003c\/a\u003e\u003cspan\u003e\/\u003c\/span\u003eLibido \u0026amp; Sexual Health\u003c\/div\u003e\n\u003cdiv class=\"px-kick\"\u003eLibido \u0026amp; Sexual Health\u003c\/div\u003e\n\u003ch1\u003ePeptides for Libido \u0026amp; Sexual-Health Research\u003c\/h1\u003e\n\u003cdiv class=\"px-lede\"\u003ePeptides for libido are compounds studied for the endocrine and neurological signalling associated with sexual health. The two compounds in this category approach it from opposite directions — HCG through the hormonal axis and gonadotropin receptors, and Melanotan II through melanocortin pathways in the central nervous system.\u003c\/div\u003e\n\u003cul class=\"px-ticks\"\u003e\n\u003cli\u003e99%+ Verified Purity\u003c\/li\u003e\n\u003cli\u003eIndependent HPLC Assay\u003c\/li\u003e\n\u003cli\u003eThird-Party Lab Tested\u003c\/li\u003e\n\u003cli\u003eLyophilised \u0026amp; Sealed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"px-btns\"\u003e\n\u003ca class=\"px-b1\" href=\"#px-grid\"\u003eView the 2 compounds\u003c\/a\u003e\u003ca class=\"px-b2\" href=\"#px-choose\"\u003eHow to choose\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"px-img\" alt=\"Purist Peptides research vials for libido and sexual health research\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0984\/2422\/6090\/files\/hf_20260226_142914_4f09844d-ab75-4b9c-8ba6-bfc18ab639ec.jpg?v=1772797277\u0026amp;width=900\" width=\"900\" height=\"900\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-stats\"\u003e\u003cdiv class=\"px-in\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e2\u003c\/b\u003e\u003ci\u003eCompounds in category\u003c\/i\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e99%+\u003c\/b\u003e\u003ci\u003eMinimum verified purity\u003c\/i\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003eHPLC\u003c\/b\u003e\u003ci\u003eIndependent assay method\u003c\/i\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e100%\u003c\/b\u003e\u003ci\u003eBatches assayed\u003c\/i\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"px-cut\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"px px-bot\"\u003e\n\u003cdiv class=\"px-full px-sec\"\u003e\u003cdiv class=\"px-in px-g2\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"px-kick\"\u003eMechanisms\u003c\/div\u003e\n\u003ch2\u003eTwo distinct pathways, not two versions of the same thing\u003c\/h2\u003e\n\u003cdiv class=\"px-lede\" style=\"max-width:none\"\u003eHCG (human chorionic gonadotropin) is a glycoprotein hormone analogue studied for its action on the LH\/CG receptor, and is referenced in endocrine and testicular-function research, frequently in the context of hormone-support protocols. Melanotan II is a melanocortin peptide studied for α-MSH signalling; while best known for pigmentation research, its libido and mood-pathway applications are a documented and separate research use, generally investigated at 250–500 mcg, 2–3× weekly with evening timing preferred and lower doses often sufficient.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"px-img\" alt=\"Purist Peptides research compounds in a laboratory setting\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0984\/2422\/6090\/files\/ChatGPT_Image_Mar_7_2026_11_45_56_AM.png?v=1772864180\u0026amp;width=800\" width=\"800\" height=\"800\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-sec px-alt\"\u003e\u003cdiv class=\"px-in\"\u003e\n\u003cdiv class=\"px-kick\"\u003eStudy design\u003c\/div\u003e\n\u003ch2\u003eResearch framing and availability\u003c\/h2\u003e\n\u003cdiv class=\"px-sub\" style=\"max-width:900px\"\u003eThis is endocrine and neuroendocrine research, not hormone therapy, and no medical claim is made for either compound. Both are supplied strictly for laboratory use. Please note HCG availability is limited and the category may not always show full stock. Melanotan II protocols also warrant attention to the transient flushing and nausea responses documented on its product page, which is why evening administration and lower starting doses are standard in the literature.\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-sec\"\u003e\u003cdiv class=\"px-in\"\u003e\n\u003cdiv class=\"px-kick\"\u003eThe range\u003c\/div\u003e\n\u003ch2\u003eCompounds in this category\u003c\/h2\u003e\n\u003cdiv class=\"px-sub\"\u003eThe compounds grouped here, each with the pathway it is studied for and the protocol shape most often used.\u003c\/div\u003e\n\u003cdiv class=\"px-cc\"\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ca href=\"\/products\/hcg\"\u003e\u003cimg alt=\"HCG research peptide vial by Purist Peptides\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0984\/2422\/6090\/files\/purist-peptides-hcg-5000iu-gonadotropin-hormone-research-peptide-vial.jpg?v=1784719137\u0026amp;width=520\" width=\"520\" height=\"520\" loading=\"lazy\"\u003e\u003c\/a\u003e\u003cdiv class=\"px-cbody\"\u003e\n\u003ch4\u003eHCG\u003c\/h4\u003e\n\u003cdiv class=\"px-mech\"\u003eGonadotropin analogue\u003c\/div\u003e\n\u003cdiv class=\"px-cd\"\u003eA glycoprotein hormone analogue studied for LH\/CG receptor activity, endocrine signalling and testicular function, commonly referenced in hormone-support research contexts. Stock is limited.\u003c\/div\u003e\n\u003ca class=\"px-lnk\" href=\"\/products\/hcg\"\u003eView HCG\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ca href=\"\/products\/melanotan-ii\"\u003e\u003cimg alt=\"Melanotan II research peptide vial by Purist Peptides\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0984\/2422\/6090\/files\/purist-peptides-melanotan-ii-melanocortin-research-peptide-vial.jpg?v=1784719132\u0026amp;width=520\" width=\"520\" height=\"520\" loading=\"lazy\"\u003e\u003c\/a\u003e\u003cdiv class=\"px-cbody\"\u003e\n\u003ch4\u003eMelanotan II\u003c\/h4\u003e\n\u003cdiv class=\"px-mech\"\u003eMelanocortin agonist\u003c\/div\u003e\n\u003cdiv class=\"px-cd\"\u003eAlso studied for pigmentation and photoprotection. A melanocortin peptide studied for α-MSH-related libido and mood pathways at 250–500 mcg, 2–3× weekly over 4–6 weeks, with evening dosing preferred\u003c\/div\u003e\n\u003ca class=\"px-lnk\" href=\"\/products\/melanotan-ii\"\u003eView Melanotan II\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-sec px-alt\" id=\"px-choose\"\u003e\u003cdiv class=\"px-in\"\u003e\n\u003cdiv class=\"px-kick\"\u003eSelection\u003c\/div\u003e\n\u003ch2\u003eHow to choose\u003c\/h2\u003e\n\u003cdiv class=\"px-sub\"\u003eStart from the research question, not the compound name.\u003c\/div\u003e\n\u003ctable class=\"px-tbl\"\u003e\n\u003ctr\u003e\n\u003cth\u003eIf the research question is…\u003c\/th\u003e\n\u003cth\u003eStart with\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHormonal and endocrine-axis research\u003c\/td\u003e\n\u003ctd\u003eHCG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMelanocortin and central-pathway research\u003c\/td\u003e\n\u003ctd\u003eMelanotan II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePigmentation rather than libido endpoints\u003c\/td\u003e\n\u003ctd\u003esee \u003ca href=\"\/collections\/skin-peptides\"\u003ePeptides for Skin\u003c\/a\u003e, where Melanotan II also appears\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEndocrine research alongside body composition\u003c\/td\u003e\n\u003ctd\u003ethe \u003ca href=\"\/pages\/hormone-optimisation-peptide-stack\"\u003eHormone Optimisation Stack\u003c\/a\u003e pairs HCG with Retatrutide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrowth-hormone axis instead\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/collections\/lean-muscle-growth-peptides\"\u003ePeptides for Lean Muscle\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-sec\"\u003e\u003cdiv class=\"px-in\"\u003e\n\u003cdiv class=\"px-kick\"\u003ePre-paired\u003c\/div\u003e\n\u003ch2\u003eStacks built on this category\u003c\/h2\u003e\n\u003cdiv class=\"px-sub\"\u003eTwo pathways studied in parallel, priced and packaged as one protocol.\u003c\/div\u003e\n\u003cdiv class=\"px-stk\"\u003e\u003ca class=\"px-stkc\" href=\"\/pages\/hormone-optimisation-peptide-stack\"\u003e\u003cspan class=\"px-stkt\"\u003eHormone Optimisation Stack\u003c\/span\u003e\u003cspan class=\"px-stkd\"\u003eHCG + Retatrutide — endocrine axis alongside body composition.\u003c\/span\u003e\u003cspan class=\"px-stka\"\u003eView the stack\u003c\/span\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-sec px-alt\"\u003e\u003cdiv class=\"px-in px-g2\"\u003e\n\u003cdiv\u003e\u003cimg class=\"px-img\" alt=\"Independent laboratory testing of Purist Peptides research compounds\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0984\/2422\/6090\/files\/ChatGPT_Image_Mar_7_2026_01_51_37_PM.png?v=1772871717\u0026amp;width=800\" width=\"800\" height=\"800\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"px-kick\"\u003eVerified quality\u003c\/div\u003e\n\u003ch2\u003eTested before it ships\u003c\/h2\u003e\n\u003cdiv class=\"px-sub\"\u003eMinimum 99% verified purity, independently third-party assayed each batch · documented protocol, dose-titration and tolerance guidance on each product page, including transient-response notes for Melanotan II · lyophilised, refrigerate 2–8 °C after reconstitution. See Quality Standards.\u003c\/div\u003e\n\u003cdiv class=\"px-btns\"\u003e\u003ca class=\"px-b2\" href=\"\/pages\/quality-standards\"\u003eSee Quality Standards \u0026amp; all COAs\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-sec\"\u003e\u003cdiv class=\"px-in\"\u003e\u003cdiv class=\"px-faq\"\u003e\n\u003cdiv class=\"px-kick\"\u003eQuestions\u003c\/div\u003e\n\u003ch2\u003eLibido research FAQ\u003c\/h2\u003e\n\u003cdetails class=\"px-ac\" open\u003e\u003csummary\u003e\u003ch3\u003eHow do HCG and Melanotan II differ?\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"px-ab\"\u003e\u003cp\u003eThey act on unrelated systems. HCG is a gonadotropin analogue acting on the LH\/CG receptor, studied in endocrine and testicular-function research. Melanotan II is a melanocortin peptide studied for α-MSH signalling in central libido and mood pathways.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"px-ac\"\u003e\u003csummary\u003e\u003ch3\u003eIs Melanotan II only for pigmentation?\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"px-ab\"\u003e\u003cp\u003eNo. Pigmentation is its best-known research application, but libido and energy-pathway research through α-MSH signalling is a documented separate use, typically at lower doses of 250–500 mcg, 2–3× weekly with evening timing.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"px-ac\"\u003e\u003csummary\u003e\u003ch3\u003eIs this hormone therapy?\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"px-ab\"\u003e\u003cp\u003eNo. Both compounds are supplied strictly for in-vitro research and laboratory use by qualified researchers. No therapeutic or medical claim is made, and endocrine research is simply one context in which they are studied.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"px-ac\"\u003e\u003csummary\u003e\u003ch3\u003eWhy is evening dosing preferred for Melanotan II?\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"px-ab\"\u003e\u003cp\u003eResearch protocols commonly use evening administration to reduce the transient flushing and nausea responses documented on the product page. Lower starting doses are also standard for the same reason.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"px-ac\"\u003e\u003csummary\u003e\u003ch3\u003eIs HCG in stock?\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"px-ab\"\u003e\u003cp\u003eHCG availability is limited and fluctuates. Current stock is shown on the product page; where unavailable, register interest so you are notified when a batch arrives.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-sec px-alt\"\u003e\u003cdiv class=\"px-in\"\u003e\n\u003cdiv class=\"px-kick\"\u003eKeep exploring\u003c\/div\u003e\n\u003ch2\u003eRelated research categories\u003c\/h2\u003e\n\u003cdiv class=\"px-rel\"\u003e\n\u003ca href=\"\/collections\/lean-muscle-growth-peptides\"\u003eLean Muscle \u0026amp; Growth\u003c\/a\u003e\u003ca href=\"\/collections\/skin-peptides\"\u003eSkin \u0026amp; Collagen\u003c\/a\u003e\u003ca href=\"\/collections\/anti-aging-longevity-peptides\"\u003eAnti-Ageing \u0026amp; Longevity\u003c\/a\u003e\u003ca href=\"\/collections\/fat-loss-peptides\"\u003eFat Loss\u003c\/a\u003e\u003ca href=\"\/collections\/all-peptides\"\u003eThe full range\u003c\/a\u003e\u003ca href=\"\/pages\/peptide-stacks\"\u003eAll peptide stacks\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-cta\"\u003e\u003cdiv class=\"px-in\"\u003e\n\u003ch2\u003eResearch-grade, verified, traceable.\u003c\/h2\u003e\n\u003cp\u003eEvery batch assayed by an independent laboratory before release — minimum 99% verified purity.\u003c\/p\u003e\n\u003cdiv class=\"px-btns\" style=\"justify-content:center\"\u003e\n\u003ca class=\"px-b1\" style=\"background:#fff;color:#0d2233!important\" href=\"#px-grid\"\u003eShop this category\u003c\/a\u003e\u003ca class=\"px-b2\" style=\"background:transparent;color:#fff!important;border:1px solid rgba(255,255,255,.35)\" href=\"\/pages\/quality-standards\"\u003eQuality Standards\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"px-full px-note\"\u003e\u003cdiv class=\"px-in\"\u003e\u003cem\u003eResearch use only. Not for human or veterinary consumption. Supplied strictly for qualified researchers and laboratory settings.\u003c\/em\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\n(function(){var th=document.querySelector('header.purist-hero h1');if(th)th.remove();var g=document.querySelector('[id*=\"collection_products\"]');if(g\u0026\u0026!document.getElementById('px-grid')){var a=document.createElement('span');a.id='px-grid';a.style.cssText='display:block;position:relative;top:-90px';g.parentNode.insertBefore(a,g);}})();\n\u003c\/script\u003e","products":[{"product_id":"melanotan-ii","title":"Melanotan II","description":"\u003cp\u003e\u003cspan data-path-to-node=\"2,2,1,0\"\u003e\u003cspan class=\"citation-270\"\u003eThe compound is noted for its molecular stability, which supports its use in advanced receptor signaling research\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-path-to-node=\"2,2,1,1\"\u003e\u003cspan class=\"citation-270 citation-end-270\"\u003e\u003csup data-turn-source-index=\"3\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-path-to-node=\"2,2,1,2\"\u003e. \u003cspan data-path-to-node=\"2,1,1,0\"\u003e\u003cspan class=\"citation-271\"\u003eIts receptor activity provides a framework for investigating biological signaling mechanisms, cellular regulation, and communication processes\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-path-to-node=\"2,1,1,1\"\u003e\u003cspan class=\"citation-271 citation-end-271\"\u003e\u003csup data-turn-source-index=\"2\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-path-to-node=\"2,1,1,2\"\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-path-to-node=\"2,2,1,2\"\u003e\u003cspan data-path-to-node=\"2,1,1,2\"\u003eKey Features:\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-huuid=\"1670997690341634579\"\u003e\u003cspan\u003e\u003cstrong\u003eMelanin Production Support:\u003c\/strong\u003e Linked to darker pigmentation and tanning-focused goals.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-huuid=\"1670997690341634561\"\u003e\u003cspan\u003e\u003cstrong\u003eSkin Pigmentation Focus:\u003c\/strong\u003e Associated with skin tone discussions and pigmentation signaling.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-huuid=\"1670997690341634543\"\u003e\u003cspan\u003e\u003cstrong\u003eUV Response Context:\u003c\/strong\u003e Referenced in conversations regarding skin response to UV exposure.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-huuid=\"1670997690341634525\"\u003e\u003cspan\u003e\u003cstrong\u003ePurity\u003c\/strong\u003e \u003cstrong\u003eVerified:\u003c\/strong\u003e Analytically assessed to be 99% pure.\u003c\/span\u003e\u003c\/span\u003e\n\u003cdiv class=\"CM8kHf j86kh\" data-hveid=\"CAwQAQ\"\u003e\n\u003clink href=\"https:\/\/www.gstatic.com\/external_hosted\/xits_woff\/xits.css\" rel=\"stylesheet\" nonce=\"\"\u003e\n\u003cdiv data-expression=\"\\geq99\\%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb data-path-to-node=\"12,2,1,6,0\" data-index-in-node=\"0\"\u003eRegulatory Note:\u003c\/b\u003e Research Use Only.\u003c\/p\u003e","brand":"Purist Peptides","offers":[{"title":"Default Title","offer_id":51215244689706,"sku":null,"price":400.0,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/2422\/6090\/files\/purist-peptides-melanotan-ii-melanocortin-research-peptide-vial.jpg?v=1784719132"},{"product_id":"hcg","title":"HCG","description":"\u003cp\u003eHCG (Human Chorionic Gonadotropin) is a glycoprotein hormone analogue structurally similar to luteinizing hormone (LH), used in laboratory research on the LH\/CG receptor and endocrine signaling pathways.\u003c\/p\u003e\u003cp\u003eKey Features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eLH Receptor Activation:\u003c\/b\u003e Studied for its interaction with LH\/CG receptor signaling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSteroidogenic Pathway Research:\u003c\/b\u003e Used in studies of hormone synthesis signaling pathways.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReceptor Binding Studies:\u003c\/b\u003e Selected for endocrine pathway research applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturing:\u003c\/b\u003e Produced to strict purity standards and verified for batch consistency.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eRegulatory Note:\u003c\/b\u003e Research Use Only. Not for human consumption.\u003c\/p\u003e","brand":"Purist Peptides","offers":[{"title":"Default Title","offer_id":51215245410602,"sku":null,"price":750.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/2422\/6090\/files\/purist-peptides-hcg-5000iu-gonadotropin-hormone-research-peptide-vial.jpg?v=1784719137"}],"url":"https:\/\/puristpeptides.co.za\/collections\/libido-sexual-health-peptides.oembed","provider":"Purist Peptides","version":"1.0","type":"link"}