{"id":3101,"date":"2026-07-12T10:14:51","date_gmt":"2026-07-12T08:14:51","guid":{"rendered":"https:\/\/peptelia.com\/bibliothek\/"},"modified":"2026-09-24T10:52:17","modified_gmt":"2026-09-24T08:52:17","slug":"library","status":"publish","type":"page","link":"https:\/\/peptelia.com\/en\/library\/","title":{"rendered":"Library"},"content":{"rendered":"<style>\n.pl-wrap{background:#F5F7F8;font-family:'Schibsted Grotesk',system-ui,-apple-system,sans-serif;color:#101D26;padding:56px 22px 76px;margin:0 -15px;}\n.pl-wrap *{box-sizing:border-box;}\n.pl-inner{max-width:1120px;margin:0 auto;}\n.pl-eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:ui-monospace,monospace;font-size:11px;letter-spacing:1.2px;color:#0E6E6B;border:1px solid #BFD6D4;background:#EDF4F3;padding:6px 14px;border-radius:999px;margin-bottom:22px;}\n.pl-eyebrow i{width:6px;height:6px;border-radius:50%;background:#0E6E6B;animation:plPulse 2.4s ease-in-out infinite;}\n.pl-wrap h2.pl-h{font-size:44px;line-height:1.08;font-weight:800;letter-spacing:-1.4px;margin:0 0 14px;color:#101D26;}\n.pl-lead{font-size:18px;line-height:1.6;color:#42525A;max-width:640px;margin:0 0 12px;}\n.pl-note{font-family:ui-monospace,monospace;font-size:11px;letter-spacing:.5px;color:#5B6B72;margin:0 0 36px;}\n.pl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(258px,1fr));gap:18px;}\n.pl-card{background:#FFFFFF;border:1px solid #DDE4E6;border-radius:14px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}\n.pl-card:hover{border-color:#0E6E6B;box-shadow:0 10px 30px rgba(16,29,38,.07);}\n.pl-card[open]{border-color:#0E6E6B;box-shadow:0 10px 30px rgba(16,29,38,.07);}\n.pl-card summary{list-style:none;cursor:pointer;display:block;}\n.pl-card summary::-webkit-details-marker{display:none;}\n.pl-vis{height:168px;background:linear-gradient(180deg,#F7FAFA 0%,#EDF4F4 100%);border-bottom:1px solid #DDE4E6;position:relative;}\n.pl-vis canvas{width:100%;height:100%;display:block;}\n.pl-chip{position:absolute;top:12px;left:12px;z-index:2;font-family:ui-monospace,monospace;font-size:9.5px;letter-spacing:.8px;padding:5px 10px;border-radius:999px;background:#FFFFFF;border:1px solid #DDE4E6;color:#0E6E6B;}\n.pl-body{padding:18px 20px;}\n.pl-name{font-size:19px;font-weight:700;color:#101D26;margin:0 0 4px;}\n.pl-sub{font-size:13.5px;color:#42525A;line-height:1.55;margin:0;}\n.pl-more{font-family:ui-monospace,monospace;font-size:10.5px;color:#0E6E6B;letter-spacing:.5px;margin-top:14px;}\n.pl-card[open] .pl-more{display:none;}\n.pl-detail{padding:2px 20px 22px;border-top:1px solid #EEF2F3;}\n.pl-detail h4{font-size:10.5px;letter-spacing:1px;font-family:ui-monospace,monospace;color:#0E6E6B;margin:16px 0 5px;text-transform:uppercase;}\n.pl-detail p{font-size:13.5px;line-height:1.65;color:#42525A;margin:0;}\n.pl-fields{display:flex;flex-wrap:wrap;gap:6px;margin-top:7px;}\n.pl-tag{font-size:11px;padding:5px 10px;border-radius:6px;background:#EDF4F3;color:#0E6E6B;}\n.pl-quality{font-family:ui-monospace,monospace;font-size:10px;letter-spacing:.5px;color:#5B6B72;margin-top:18px;padding-top:13px;border-top:1px solid #EEF2F3;}\n.pl-btn{display:inline-flex;align-items:center;gap:7px;margin-top:16px;background:#101D26;color:#F5F7F8;text-decoration:none;font-size:14px;font-weight:600;padding:12px 20px;border-radius:8px;transition:background .18s ease;}\n.pl-btn:hover{background:#0E6E6B;color:#fff;}\n.pl-foot{margin-top:40px;font-size:12.5px;color:#5B6B72;line-height:1.65;border-top:1px solid #DDE4E6;padding-top:20px;}\n@keyframes plPulse{0%,100%{opacity:1}50%{opacity:.35}}\n@media (max-width:600px){.pl-wrap h2.pl-h{font-size:31px;}}\n<\/style>\n<div class=\"pl-wrap\">\n<div class=\"pl-inner\">\n<div class=\"pl-eyebrow\"><i><\/i>PEPT\u00c9LIA LIBRARY<\/div>\n<h2 class=\"pl-h\">The Peptide Library<\/h2>\n<p class=\"pl-lead\">Which molecule is which, and what is it studied for in research? An overview of our range \u2014 clear and free of marketing fluff.<\/p>\n<p class=\"pl-note\">FOR RESEARCH PURPOSES ONLY \u00b7 NO USE OR DOSING RECOMMENDATIONS<\/p>\n<div class=\"pl-grid\">\n<details class=\"pl-card\">\n<summary>\n<div class=\"pl-vis\"><span class=\"pl-chip\">METABOLIC \u00b7 GLP-1<\/span><canvas class=\"pl3d\" data-shape=\"helix\" data-n=\"9\" data-seed=\"1\"><\/canvas><\/div>\n<div class=\"pl-body\">\n<p class=\"pl-name\">Semaglutide \u00b7 GLP-1<\/p>\n<p class=\"pl-sub\">GLP-1 receptor agonist at the centre of metabolic research.<\/p>\n<div class=\"pl-more\">\u25b8 Learn more<\/div>\n<\/div>\n<\/summary>\n<div class=\"pl-detail\">\n<h4>What it is<\/h4>\n<p>A peptide that targets the GLP-1 receptor. Semaglutide is one of the most intensively studied molecules in energy and glucose metabolism.<\/p>\n<h4>Research fields<\/h4>\n<div class=\"pl-fields\"><span class=\"pl-tag\">Metabolic research<\/span><span class=\"pl-tag\">Endocrinology<\/span><span class=\"pl-tag\">Energy homeostasis<\/span><\/div>\n<div class=\"pl-quality\">COA PER BATCH \u00b7 HPLC >99 % \u00b7 VERIFIED IN-HOUSE<\/div>\n<p>      <a class=\"pl-btn\" href=\"https:\/\/peptelia.com\/en\/library\/glp-nomenclature\/\">GLP-1 to GLP-5 explained \u2192<\/a>\n    <\/div>\n<\/details>\n<details class=\"pl-card\">\n<summary>\n<div class=\"pl-vis\"><span class=\"pl-chip\">METABOLIC \u00b7 GLP-2<\/span><canvas class=\"pl3d\" data-shape=\"helix\" data-n=\"11\" data-seed=\"2\"><\/canvas><\/div>\n<div class=\"pl-body\">\n<p class=\"pl-name\">Tirzepatide \u00b7 GLP-2<\/p>\n<p class=\"pl-sub\">Dual receptor agonist studied in metabolic research.<\/p>\n<div class=\"pl-more\">\u25b8 Learn more<\/div>\n<\/div>\n<\/summary>\n<div class=\"pl-detail\">\n<h4>What it is<\/h4>\n<p>A peptide with dual receptor activity that is studied in metabolic research. Listed as GLP-2 in our range.<\/p>\n<h4>Research fields<\/h4>\n<div class=\"pl-fields\"><span class=\"pl-tag\">Metabolic research<\/span><span class=\"pl-tag\">Endocrinology<\/span><\/div>\n<div class=\"pl-quality\">COA PER BATCH \u00b7 HPLC >99 % \u00b7 VERIFIED IN-HOUSE<\/div>\n<p>      <a class=\"pl-btn\" href=\"https:\/\/peptelia.com\/en\/library\/glp-nomenclature\/\">GLP-1 to GLP-5 explained \u2192<\/a>\n    <\/div>\n<\/details>\n<details class=\"pl-card\">\n<summary>\n<div class=\"pl-vis\"><span class=\"pl-chip\">METABOLIC \u00b7 GLP-3<\/span><canvas class=\"pl3d\" data-shape=\"helix\" data-n=\"13\" data-seed=\"3\"><\/canvas><\/div>\n<div class=\"pl-body\">\n<p class=\"pl-name\">Retatrutide \u00b7 GLP-3<\/p>\n<p class=\"pl-sub\">Internationally sought-after triple agonist in metabolic research.<\/p>\n<div class=\"pl-more\">\u25b8 Learn more<\/div>\n<\/div>\n<\/summary>\n<div class=\"pl-detail\">\n<h4>What it is<\/h4>\n<p>A triple agonist peptide and one of the most sought-after research peptides in the metabolic field worldwide.<\/p>\n<h4>Research fields<\/h4>\n<div class=\"pl-fields\"><span class=\"pl-tag\">Metabolic research<\/span><span class=\"pl-tag\">Energy metabolism<\/span><\/div>\n<div class=\"pl-quality\">COA PER BATCH \u00b7 HPLC >99 % \u00b7 VERIFIED IN-HOUSE<\/div>\n<p>      <a class=\"pl-btn\" href=\"https:\/\/peptelia.com\/en\/products\/retatrutide-glp-3-peptide-5mg\/\">View product \u2192<\/a>\n    <\/div>\n<\/details>\n<details class=\"pl-card\">\n<summary>\n<div class=\"pl-vis\"><span class=\"pl-chip\">REGENERATION<\/span><canvas class=\"pl3d\" data-shape=\"branch\" data-n=\"8\" data-seed=\"4\"><\/canvas><\/div>\n<div class=\"pl-body\">\n<p class=\"pl-name\">TB-500<\/p>\n<p class=\"pl-sub\">Thymosin \u03b24 fragment studied in tissue repair.<\/p>\n<div class=\"pl-more\">\u25b8 Learn more<\/div>\n<\/div>\n<\/summary>\n<div class=\"pl-detail\">\n<h4>What it is<\/h4>\n<p>A synthetic fragment of the protein thymosin \u03b24 that is researched in the context of tissue renewal and regeneration.<\/p>\n<h4>Research fields<\/h4>\n<div class=\"pl-fields\"><span class=\"pl-tag\">Regenerative research<\/span><span class=\"pl-tag\">Tissue repair<\/span><\/div>\n<div class=\"pl-quality\">COA PER BATCH \u00b7 HPLC >99 % \u00b7 VERIFIED IN-HOUSE<\/div>\n<p>      <a class=\"pl-btn\" href=\"https:\/\/peptelia.com\/en\/products\/tb-500-research-peptide-10mg\/\">View product \u2192<\/a>\n    <\/div>\n<\/details>\n<details class=\"pl-card\">\n<summary>\n<div class=\"pl-vis\"><span class=\"pl-chip\">ANTI-AGING<\/span><canvas class=\"pl3d\" data-shape=\"ring\" data-n=\"7\" data-seed=\"5\"><\/canvas><\/div>\n<div class=\"pl-body\">\n<p class=\"pl-name\">GHK-Cu<\/p>\n<p class=\"pl-sub\">Copper peptide researched for skin and collagen processes.<\/p>\n<div class=\"pl-more\">\u25b8 Learn more<\/div>\n<\/div>\n<\/summary>\n<div class=\"pl-detail\">\n<h4>What it is<\/h4>\n<p>A naturally occurring copper-binding peptide studied in dermatological and cell-biology research on skin regeneration and collagen synthesis.<\/p>\n<h4>Research fields<\/h4>\n<div class=\"pl-fields\"><span class=\"pl-tag\">Dermatological research<\/span><span class=\"pl-tag\">Collagen synthesis<\/span><span class=\"pl-tag\">Longevity<\/span><\/div>\n<div class=\"pl-quality\">COA PER BATCH \u00b7 HPLC >99 % \u00b7 VERIFIED IN-HOUSE<\/div>\n<p>      <a class=\"pl-btn\" href=\"https:\/\/peptelia.com\/en\/products\/ghk-cu-copper-peptide-50mg\/\">View product \u2192<\/a>\n    <\/div>\n<\/details>\n<details class=\"pl-card\">\n<summary>\n<div class=\"pl-vis\"><span class=\"pl-chip\">NOOTROPICS<\/span><canvas class=\"pl3d\" data-shape=\"branch\" data-n=\"7\" data-seed=\"6\"><\/canvas><\/div>\n<div class=\"pl-body\">\n<p class=\"pl-name\">Semax<\/p>\n<p class=\"pl-sub\">Neuropeptide studied in relation to cognitive processes.<\/p>\n<div class=\"pl-more\">\u25b8 Learn more<\/div>\n<\/div>\n<\/summary>\n<div class=\"pl-detail\">\n<h4>What it is<\/h4>\n<p>A synthetic neuropeptide studied in neuroscience research on cognitive and neuroprotective processes.<\/p>\n<h4>Research fields<\/h4>\n<div class=\"pl-fields\"><span class=\"pl-tag\">Neuroscience<\/span><span class=\"pl-tag\">Cognitive processes<\/span><\/div>\n<div class=\"pl-quality\">COA PER BATCH \u00b7 HPLC >99 % \u00b7 VERIFIED IN-HOUSE<\/div>\n<p>      <a class=\"pl-btn\" href=\"https:\/\/peptelia.com\/en\/products\/semax-neuropeptide-5mg\/\">View product \u2192<\/a>\n    <\/div>\n<\/details>\n<details class=\"pl-card\">\n<summary>\n<div class=\"pl-vis\"><span class=\"pl-chip\">NOOTROPICS<\/span><canvas class=\"pl3d\" data-shape=\"helix\" data-n=\"7\" data-seed=\"7\"><\/canvas><\/div>\n<div class=\"pl-body\">\n<p class=\"pl-name\">Selank<\/p>\n<p class=\"pl-sub\">Neuropeptide studied in stress-related research.<\/p>\n<div class=\"pl-more\">\u25b8 Learn more<\/div>\n<\/div>\n<\/summary>\n<div class=\"pl-detail\">\n<h4>What it is<\/h4>\n<p>A synthetic neuropeptide studied in stress-related and anxiolytic research approaches.<\/p>\n<h4>Research fields<\/h4>\n<div class=\"pl-fields\"><span class=\"pl-tag\">Neuroscience<\/span><span class=\"pl-tag\">Stress research<\/span><\/div>\n<div class=\"pl-quality\">COA PER BATCH \u00b7 HPLC >99 % \u00b7 VERIFIED IN-HOUSE<\/div>\n<p>      <a class=\"pl-btn\" href=\"https:\/\/peptelia.com\/en\/products\/selank-research-peptide-5mg\/\">View product \u2192<\/a>\n    <\/div>\n<\/details><\/div>\n<div class=\"pl-foot\">This library describes what the molecules are and in which fields they are studied scientifically. It contains no use, dosing or health recommendations. All products are intended exclusively for laboratory research use \u2014 For Research Purposes Only.<\/div>\n<\/div>\n<\/div>\n<p><script>\n(function(){\nvar PAL=['#0E6E6B','#0870B0','#2AA5A0','#5DCAA5','#9FE1CB','#D9CFA3'];\nfunction rnd(s){var x=Math.sin(s*127.1)*43758.5453;return x-Math.floor(x);}\nfunction buildAtoms(shape,n,seed){\nvar atoms=[],bonds=[],i;\nif(shape==='ring'){\nvar R=52;\nfor(i=0;i<n-1;i++){var a=(i\/(n-1))*Math.PI*2;atoms.push({x:Math.cos(a)*R,y:Math.sin(a)*R*0.55,z:Math.sin(a)*R,r:8,c:PAL[i%4]});bonds.push([i,(i+1)%(n-1)]);}\natoms.push({x:0,y:0,z:0,r:11,c:'#D9CFA3'});\nfor(i=0;i<n-1;i+=2){bonds.push([i,n-1]);}\n}else if(shape==='branch'){\nfor(i=0;i<n;i++){var t=i\/(n-1);atoms.push({x:(t-0.5)*130,y:Math.sin(t*Math.PI*2.2+seed)*20,z:Math.cos(t*Math.PI*1.8+seed)*34,r:8,c:PAL[i%4]});if(i>0){bonds.push([i-1,i]);}}\nfor(i=1;i<n;i+=2){var p=atoms[i];atoms.push({x:p.x+14,y:p.y-26,z:p.z+10,r:5.5,c:PAL[4]});bonds.push([i,atoms.length-1]);}\n}else{\nfor(i=0;i<n;i++){var u=i\/(n-1),ang=u*Math.PI*3.2+seed;atoms.push({x:(u-0.5)*140,y:Math.sin(ang)*26,z:Math.cos(ang)*32,r:7.5+rnd(i+seed)*2.5,c:PAL[i%4]});if(i>0){bonds.push([i-1,i]);}}\n}\nreturn {atoms:atoms,bonds:bonds};\n}\nfunction shade(hex,amt){\nvar r=parseInt(hex.substr(1,2),16),g=parseInt(hex.substr(3,2),16),b=parseInt(hex.substr(5,2),16);\nr=Math.max(0,Math.min(255,Math.round(r+amt)));g=Math.max(0,Math.min(255,Math.round(g+amt)));b=Math.max(0,Math.min(255,Math.round(b+amt)));\nreturn 'rgb('+r+','+g+','+b+')';\n}\nfunction init(cv){\nvar ctx=cv.getContext('2d'),W=0,H=0,dpr=1;\nvar shape=cv.getAttribute('data-shape')||'helix';\nvar n=parseInt(cv.getAttribute('data-n')||'9',10);\nvar seed=parseFloat(cv.getAttribute('data-seed')||'1');\nvar mol=buildAtoms(shape,n,seed);\nvar TILT=-0.42,FOV=340;\nfunction size(){\ndpr=Math.min(window.devicePixelRatio||1,2);\nvar r=cv.getBoundingClientRect();\nW=r.width;H=r.height;\ncv.width=Math.max(1,Math.round(W*dpr));cv.height=Math.max(1,Math.round(H*dpr));\nctx.setTransform(dpr,0,0,dpr,0,0);\n}\nif(window.ResizeObserver){new ResizeObserver(size).observe(cv);}\nwindow.addEventListener('resize',size);\nsize();\nfunction project(p,ang){\nvar ca=Math.cos(ang),sa=Math.sin(ang);\nvar x=p.x*ca-p.z*sa;\nvar z=p.x*sa+p.z*ca;\nvar y=p.y*Math.cos(TILT)-z*Math.sin(TILT);\nvar zz=p.y*Math.sin(TILT)+z*Math.cos(TILT);\nvar f=FOV\/(FOV+zz);\nreturn {sx:W\/2+x*f,sy:H\/2+y*f,f:f,z:zz,a:p};\n}\nfunction frame(now){\nif(!W||!H){requestAnimationFrame(frame);return;}\nvar ang=(now\/1000)*0.42+seed;\nctx.clearRect(0,0,W,H);\nvar pts=[];\nfor(var k=0;k<mol.atoms.length;k++){pts.push(project(mol.atoms[k],ang));}\nctx.lineCap='round';\nfor(var j=0;j<mol.bonds.length;j++){\nvar p1=pts[mol.bonds[j][0]],p2=pts[mol.bonds[j][1]];\nif(!p1||!p2){continue;}\nvar f=(p1.f+p2.f)\/2;\nctx.strokeStyle='rgba(14,110,107,'+(0.16+0.30*(f-0.7)).toFixed(3)+')';\nctx.lineWidth=Math.max(1,3.4*f);\nctx.beginPath();ctx.moveTo(p1.sx,p1.sy);ctx.lineTo(p2.sx,p2.sy);ctx.stroke();\n}\nvar sorted=pts.slice().sort(function(a,b){return b.z-a.z;});\nfor(var m=0;m<sorted.length;m++){\nvar p=sorted[m];\nvar r=p.a.r*p.f;\nif(r<0.5){continue;}\nctx.globalAlpha=0.10*p.f;\nctx.fillStyle=p.a.c;\nctx.beginPath();ctx.arc(p.sx,p.sy,r*2.1,0,Math.PI*2);ctx.fill();\nctx.globalAlpha=1;\nvar g=ctx.createRadialGradient(p.sx-r*0.36,p.sy-r*0.38,r*0.12,p.sx,p.sy,r);\ng.addColorStop(0,shade(p.a.c,70));\ng.addColorStop(0.45,p.a.c);\ng.addColorStop(1,shade(p.a.c,-34));\nctx.fillStyle=g;\nctx.beginPath();ctx.arc(p.sx,p.sy,r,0,Math.PI*2);ctx.fill();\nctx.globalAlpha=0.55;\nctx.fillStyle='#FFFFFF';\nctx.beginPath();ctx.arc(p.sx-r*0.34,p.sy-r*0.36,r*0.20,0,Math.PI*2);ctx.fill();\nctx.globalAlpha=1;\n}\nrequestAnimationFrame(frame);\n}\nrequestAnimationFrame(frame);\n}\nfunction boot(){\nvar list=document.querySelectorAll('canvas.pl3d');\nfor(var i=0;i<list.length;i++){init(list[i]);}\n}\nif(document.readyState==='loading'){document.addEventListener('DOMContentLoaded',boot);}else{boot();}\n})();\n<\/script><\/p>\n<section class=\"pep-library-guides\" aria-labelledby=\"pep-library-guides-title\">\n<div><span>Go deeper<\/span><\/p>\n<h2 id=\"pep-library-guides-title\">From molecule overview to quality assessment.<\/h2>\n<p>Use our free guides to better understand research peptides, HPLC purity and certificates of analysis.<\/p>\n<nav aria-label=\"Free guides\"><a href=\"https:\/\/peptelia.com\/en\/your-peptide-guide\/\">Open the Peptide Guide \u2192<\/a><a href=\"https:\/\/peptelia.com\/en\/your-coa-guide\/\">Open the COA Guide \u2192<\/a><a href=\"https:\/\/peptelia.com\/en\/product-quality-testing\/\">See our lab process \u2192<\/a><\/nav>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>PEPT\u00c9LIA LIBRARY The Peptide Library Which molecule is which, and what is it studied for in research? An overview of our range \u2014 clear and free of marketing fluff. FOR [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","footnotes":""},"class_list":["post-3101","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Peptide Library \u2013 Molecules &amp; Research | Pept\u00e9lia<\/title>\n<meta name=\"description\" content=\"Which research peptide is which, and what is it studied for? GLP-1, GLP-2, GLP-3, TB-500, GHK-Cu, Semax, Selank at a glance. 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