List of Peptides and What They Do: Complete Guide 2026

List of Peptides and What They Do: Complete Guide 2026. Complete peptide drugs list with uses and examples. All popular peptides, injectable peptides, and anti-inflammatory peptides organized by function. Key Takeaways Peptides are short amino acid chains (2-50 amino acids) that act as biological signaling molecules with specific receptor interactions Research categories include: tissue repair, metabolic, cognitive, and cellular mechanisms Popular research peptides: BPC-157 (tissue), TB-500 (repair), GHK-Cu (copper peptide), Semaglutide/Retatrutide (metabolic) Administration varies: topical, subcutaneous, intranasal depending on the compound — see our list of injectable peptides for the full breakdown Quality verification: Third-party testing through labs like Janoshik or Finnrick recommended before research use What Are Peptides? Peptides are short chains of amino acids—typically between 2 and 50—that act as signaling molecules in biological systems. They represent a distinct category between individual amino acids and larger proteins. How many types of peptides are there? The answer depends on classification, but this complete peptide drugs list and research peptides list covers all peptides commonly studied today — including peptide hormones, injectable peptides , anti-inflammatory peptides, and various peptides across every major therapeutic category. This guide serves as your peptide cheat sheet and peptide information resource, examining the different types of peptides and their functions organized by mechanism. We've created this to cover practically every peptide in active research use—from tissue repair compounds to metabolic regulators with real peptides examples. Looking for a list of peptides and what they do PDF? Bookmark this page as your comprehensive reference. Research into peptide mechanisms has expanded significantly, with compounds targeting various receptor systems and biological pathways. Understanding peptide names and their uses is essential for designing effective research protocols. For a focused look at FDA-approved peptide drugs specifically, see our therapeutic peptides list covering 80+ approved peptide drugs organized by category. Whichever peptides you study, the only way to know how they affect a body is to measure it. Our free peptide cheat sheet helps researchers organize the hormone, lipid, metabolic, liver, and kidney markers that matter instead of guessing. FDA-Approved GLP-1 Peptides GLP-1 receptor agonists are among the most impactful peptide-based drugs on the market today. These FDA-approved medications target appetite, blood sugar, and weight — and are now available through telehealth platforms without in-person visits. Compounded versions use the same active ingredients at significantly lower cost. Compounded Semaglutide Semaglutide is the active ingredient in Ozempic and Wegovy — a GLP-1 receptor agonist that reduces appetite and slows gastric emptying. Compounded semaglutide delivers the same molecule from licensed U.S. 503B pharmacies at a fraction of the brand-name price. For a full breakdown of semaglutide vs other GLP-1 compounds, see our GLP-1 vs Ozempic comparison . Compounded GLP-1 GLP-1 Injections — Monthly Flexible Plan $285/mo Semaglutide and tirzepatide pathways through Yucca Health. Licensed-provider review and home delivery. Get Started → Compounded Tirzepatide Tirzepatide is a dual GIP/GLP-1 receptor agonist — the active ingredient in Mounjaro and Zepbound. Clinical trials showed 20–26% body weight reduction, making it the most effective weight loss peptide currently available. Compounded tirzepatide offers the same compound at a lower price point. For dose conversions see our units-to-mg conversion tool . Compounded GLP-1 GLP-1 Injections — Monthly Flexible Plan $285/mo Semaglutide and tirzepatide pathways through Yucca Health. Licensed-provider review and home delivery. Get Started → Zepbound® Injection Zepbound is the FDA-approved brand-name tirzepatide injection for weight management, manufactured by Eli Lilly. Current PeptideStack telehealth CTAs now route to Yucca Health's active intake rather than stale brand-name membership offers. FDA-Approved Zepbound® Injection — FDA-approved reference Brand-name tirzepatide by Eli Lilly. Check current licensed-provider options through the active intake. Wegovy® Injection & Pill Wegovy is FDA-approved semaglutide for weight management, now available as both a once-weekly injection and a daily oral pill (launched January 2026). Clinical data shows ~15% body weight loss with the injection and ~14% with the pill. For a detailed comparison, see our Wegovy pill or injection guide . FDA-Approved — Pill & Injection Wegovy® — FDA-approved reference Brand-name semaglutide by Novo Nordisk. Pill or injection availability depends on the current provider intake. Grey Market Research Peptides Research-grade peptides are available for laboratory use through verified vendors. These are not FDA-approved for human use — they're sold strictly for in-vitro research. The compounds below represent our most popular products with third-party purity testing. Retatrutide (LY3437943) The first-in-class triple agonist targeting GLP-1, GIP, and glucagon receptors simultaneously. Phase 3 TRIUMPH trials showed up to 26% body weight reduction. Currently the most potent research peptide in the GLP-1 class. See our retatrutide side effects guide and approval status tracker . For an amylin-pathway comparison, read what cagrilintide peptide is used for . Research Peptide Retatrutide — From $238 (5mg × 10 vials) Triple agonist. 99.49% purity (Janoshik verified). Multiple sizes available. View Product → BPC-157 (Body Protection Compound) The most widely researched tissue repair peptide. Originally isolated from human gastric juice, BPC-157 has been the subject of extensive preclinical research on angiogenesis, tendon repair, and gastrointestinal healing pathways. Research Peptide BPC-157 — Multiple sizes available Tissue repair peptide. Third-party tested. Compare trusted vendors and save. View Product → TB-500 (Thymosin Beta-4 Fragment) TB-500 is a synthetic fragment of Thymosin Beta-4, a naturally occurring protein involved in tissue repair and cell migration. Research focuses on its role in wound healing, muscle recovery, and anti-inflammatory pathways. See the latest on TB-500 FDA approval status . Research Peptide TB-500 — Multiple sizes available Tissue repair and recovery peptide. Third-party tested. Compare vendors. View Product → NAD+ Injections NAD+ is a coenzyme essential for cellular energy production, DNA repair, and sirtuin activation. NAD+ levels decline with age, and injections deliver the molecule directly with high bioavailability. For a deep dive, see our guide on what NAD injections are good for . Telehealth NAD+ — $192/mo Yucca Health longevity program for cellular energy and wellness support. Get Started → Tirzepatide (Research Grade) Tirzepatide is a dual GIP/GLP-1 receptor agonist — the same active ingredient in Mounjaro and Zepbound. Research-grade tirzepatide is available for laboratory studies at significantly lower cost than brand-name formulations. Research Peptide Tirzepatide — From $297 (80mg) Dual GIP/GLP-1 agonist. Multiple sizes up to 1200mg. Currently Unavailable GHK-Cu (Copper Peptide) A naturally occurring copper-binding tripeptide researched for wound healing, collagen synthesis, and anti-inflammatory properties. Available in 50mg and 100mg vials. Research Peptide GHK-Cu — From $183 (50mg × 10 vials) Copper-binding tripeptide. Third-party tested. 60+ published studies. View Product → BPC-157 + TB-500 Combo The most popular peptide stack for tissue repair research. Combines BPC-157's angiogenesis pathway interactions with TB-500's cell migration mechanisms in a single convenient order. Research Combo BPC-157 + TB-500 — From $403 Tissue repair stack. Save vs buying separately. Use the BPC-157 TB-500 blend dosage calculator for combined-vial math. View Product → CJC-1295 + Ipamorelin Combo A growth hormone secretagogue stack combining CJC-1295 (GHRH analog) with Ipamorelin (selective GHSR agonist). One of the most researched GH-releasing peptide combinations. Research Combo CJC-1295 + Ipamorelin — From $380 GH secretagogue stack. Third-party tested. View Product → Ipamorelin A selective growth hormone secretagogue that targets the ghrelin receptor (GHSR) without affecting cortisol or prolactin. One of the cleanest GH-releasing peptides in research. Research Peptide Ipamorelin — From $218 Selective GH secretagogue. Third-party tested. View Product → KPV (Anti-Inflammatory Tripeptide) KPV is a tripeptide fragment derived from alpha-MSH with documented NF-kB pathway interactions. One of the most researched anti-inflammatory peptides. See our KPV peptide guide or browse the full list of anti-inflammatory peptides . Research Peptide KPV — From $326 Anti-inflammatory tripeptide. Third-party tested. View Product → SS-31 (Elamipretide) A mitochondria-targeted tetrapeptide that selectively binds to cardiolipin in the inner mitochondrial membrane. Subject of clinical trials for Barth syndrome. Research Peptide SS-31 (Elamipretide) — From $1,013 Mitochondria-targeted peptide. 50mg × 10 vials. View Product → MOTS-c A mitochondrial-derived peptide involved in metabolic regulation and exercise mimetic pathways. First identified at USC in 2015. Research Peptide MOTS-c — From $290 (10mg × 10 vials) Mitochondrial-derived peptide. Multiple sizes available. View Product → Selank A synthetic heptapeptide analog of tuftsin, researched for anxiolytic and nootropic properties. Available as standard Selank and the enhanced NA-Selank Amidate variant. Research Peptide Selank — From $283 | NA-Selank Amidate — From $500 Nootropic peptide. Standard and enhanced amidate variants. View Selank → View NA-Selank → Sermorelin A GHRH analog (growth hormone releasing hormone) that stimulates natural GH production from the pituitary. One of the original GH secretagogue peptides in research. Research Peptide Sermorelin — From $303 GHRH analog. Third-party tested. View Product → DSIP (Delta Sleep Inducing Peptide) A nonapeptide researched for its role in sleep regulation and stress response modulation. First discovered in 1977. Research Peptide DSIP — From $290 Sleep-regulating nonapeptide. Third-party tested. View Product → Humanin A mitochondrial-derived peptide with documented cytoprotective properties. Researched for neuroprotection, insulin sensitivity, and cellular stress resistance. Research Peptide Humanin — From $540 Mitochondrial-derived cytoprotective peptide. View Product → PT-141 (Bremelanotide) A melanocortin receptor agonist researched for its effects on sexual function pathways. Derived from Melanotan II with a more targeted receptor profile. Research Peptide PT-141 — Available now Melanocortin receptor agonist. Third-party tested. View Products → More Research Peptides by Category Peptide Categories by Mechanism Researchers often select peptides according to goals—whether tissue repair, metabolic modulation, cognitive enhancement, or cellular longevity. Different peptides interact with specific receptor types, creating distinct mechanistic profiles: Signal peptides: Interact with cellular signaling pathways to modulate gene expression Carrier peptides: Transport other molecules (like copper in GHK-Cu) to target tissues Enzyme-modulating peptides: Interact with enzymatic pathways to influence metabolic processes Receptor agonists: Bind to specific receptors (GLP-1, GHRH, etc.) to activate downstream signaling Peptides for Skin and Connective Tissue Research Dermatological and connective tissue research represents a significant application area for peptide compounds. GHK-Cu (Copper Peptide) GHK-Cu is a naturally occurring copper-binding peptide found in human plasma. Research has documented its interaction with wound healing and tissue remodeling pathways. Copper delivery mechanism to target tissues Documented interactions with collagen synthesis pathways Antioxidant and anti-inflammatory properties in published studies Hair follicle research applications Naturally present in human tissues, with levels documented to change with age Matrixyl (Palmitoyl Peptides) Palmitoyl Tripeptide-1 and Palmitoyl Tetrapeptide-7 are often combined in research applications. These peptides interact with extracellular matrix signaling pathways. Peptides for Tissue Repair Research Tissue repair peptides represent a significant research category with documented mechanisms in wound healing and regeneration. BPC-157 (Body Protection Compound) Originally isolated from human gastric juice, BPC-157 has become extensively researched for its tissue repair mechanisms. Published studies document various pathway interactions. Angiogenesis pathway interactions (new blood vessel formation) Tendon and ligament tissue research applications Gastrointestinal tissue research Neuroprotective pathway research Anti-inflammatory mechanism studies TB-500 (Thymosin Beta-4) TB-500 is a synthetic version of a naturally occurring peptide involved in tissue repair. Research documents its role in cell migration and regeneration pathways. Cell migration and regeneration research Inflammation pathway studies Muscle and tendon tissue research Flexibility and mobility research applications Extensive veterinary medicine literature For a detailed mechanistic comparison, see our BPC-157 vs TB-500 research comparison . KPV (Anti-Inflammatory Peptide) KPV is a tripeptide derived from alpha-melanocyte stimulating hormone (α-MSH) with documented anti-inflammatory properties. Research has focused on inflammatory pathway modulation, particularly in gut tissue and skin inflammation models. Anti-inflammatory pathway research without immunosuppression Gut tissue inflammation studies Skin barrier function research Often researched alongside BPC-157 and TB-500 For comprehensive KPV research including molecular properties and published studies, see our dedicated KPV peptide research guide . Growth Hormone Secretagogues These peptides interact with pituitary signaling to modulate growth hormone pathways. GHRP-6 (Growth Hormone Releasing Peptide-6) GHRP-6 interacts with ghrelin receptors to stimulate pituitary growth hormone release. Research documents significant appetite-modulating effects. Pituitary growth hormone release mechanisms Appetite pathway interactions Sleep architecture research Recovery and tissue repair research applications Ipamorelin A more selective growth hormone secretagogue that demonstrates cleaner receptor selectivity in published research. Selective GH release with documented selectivity profile Minimal appetite pathway interaction compared to GHRP-6 Limited cortisol and prolactin effects in published studies Often researched in combination with CJC-1295 CJC-1295 A growth hormone releasing hormone (GHRH) analog with extended half-life compared to native GHRH. Extended half-life for sustained release research Sustained growth hormone pathway activation Body composition research applications Typically researched with 1-2 daily administration protocols For detailed mechanism comparison between GHRH and GHRP peptides, see our CJC-1295 vs Ipamorelin comparison . HGH 191AA The full-length human growth hormone sequence (191 amino acids) for direct GH pathway research. Tissue Repair Research Peptide Summary Recovery and repair peptides overlap with other categories but are specifically valued for tissue research applications. Peptide Primary Research Application Key Mechanism Notable Research Focus BPC-157 Tendon/Ligament/GI Tissue Angiogenesis, growth factors Broad tissue repair pathways TB-500 Soft tissue research Cell migration, regeneration Scar tissue research GHK-Cu Wound healing, skin Copper delivery, collagen Anti-inflammatory pathways Epithalon Cellular regeneration Telomerase activation Cellular aging research Metabolic Research Peptides Metabolic peptide research has expanded significantly with incretin-based peptide development, particularly GLP-1 receptor agonists and multi-receptor compounds. For regulatory status of GLP-1 compounds including which are FDA-approved vs research-only, see our complete FDA approved peptides list . GLP-1 and Incretin-Based Peptides Semaglutide Semaglutide is a GLP-1 receptor agonist that mimics the incretin hormone to regulate appetite signaling and metabolic pathways. Research has documented significant effects on body composition and metabolic markers in clinical studies. GLP-1 receptor agonist with weekly administration research Appetite regulation pathway studies Body composition research applications FDA-approved compound with extensive clinical literature Tirzepatide Tirzepatide is a dual GIP/GLP-1 receptor agonist representing the next generation of incretin-based research compounds. Studies document enhanced efficacy compared to single-agonist peptides. Dual receptor agonism (GIP + GLP-1) Enhanced metabolic effects in comparative studies Weekly administration research protocols FDA-approved with growing clinical literature Retatrutide Retatrutide is a novel triple agonist targeting GLP-1, GIP, and glucagon receptors simultaneously. Early research suggests enhanced metabolic effects compared to dual or single agonists. Triple receptor agonism (GLP-1 + GIP + Glucagon) Phase 2 clinical trial data published Weekly administration in research protocols Emerging research compound with significant interest AOD-9604 AOD-9604 is a modified fragment of human growth hormone (amino acids 177-191). Research documents distinct metabolic pathway interactions. Lipolysis pathway research (fat metabolism) Lipogenesis inhibition studies Blood sugar pathway independence documented Cartilage tissue research applications Tesamorelin A GHRH analog with FDA orphan drug designation for specific applications. Research documents targeted visceral tissue effects. FDA-designated for lipodystrophy research Visceral tissue targeting in published studies Lean tissue preservation research Cognitive pathway research applications MOTS-c A mitochondrial-derived peptide with documented metabolic pathway interactions. Research examines mitochondrial function and insulin sensitivity. Insulin sensitivity pathway research Exercise capacity studies Mitochondrial function research Active area of published investigation SS-31 (Elamipretide) SS-31 is a synthetic mitochondria-targeted tetrapeptide that selectively binds to cardiolipin in the inner mitochondrial membrane. The first mitochondrial-targeted peptide to receive FDA approval (as Forzinity for Barth syndrome). Cardiolipin binding mechanism research FDA-approved for Barth syndrome (Forzinity) Mitochondrial membrane stabilization studies Ongoing clinical trials in heart failure and myopathy For mitochondrial peptide studies centered on cardiolipin stabilization, see our Elamipretide FDA approval status guide for a clearer look at the compound's regulatory history and current clinical positioning. Cognitive Research Peptides: Nootropic Peptides List This nootropic peptides list covers compounds that target cognitive pathways—memory, focus, and neuroprotection research. These are among the most sought-after peptides for researchers studying brain function. Semax Originally developed for neurological research, Semax interacts with BDNF (brain-derived neurotrophic factor) pathways. BDNF pathway interactions documented Memory and learning research applications Neuroprotective mechanism studies Intranasal administration for rapid absorption Clinical use documented in Russian medical literature Selank A synthetic peptide derived from tuftsin with documented anxiolytic pathway interactions without sedative properties. For a deep dive into the research, see our Selank Peptide Benefits guide covering GABA modulation, BDNF expression, and cognitive mechanisms. Browse our Selank product page for available research formats. Anxiety pathway research without sedation Non-addictive mechanism profile Memory and learning pathway interactions Immunomodulatory research applications Often researched alongside Semax Researchers specifically looking for amidated Selank can review our NA-Selank Amidate product page for the current research format. DSIP (Delta Sleep Inducing Peptide) DSIP is a neuropeptide researched for its role in sleep regulation and circadian rhythm pathways. Studies document its interaction with stress response and sleep architecture. Dihexa An experimental peptide with documented potency for synaptogenesis—new neuronal connection formation. Research remains early-stage. Documented high potency for synapse formation pathways New synapse formation research Memory and cognitive decline research Considered experimental/investigational Peptide Primary Research Focus Administration Research Application Semax Memory, Focus pathways Intranasal Cognitive enhancement research Selank Anxiety pathway research Intranasal Stress, anxiety studies Cerebrolysin Neuroprotection Injection Cognitive decline, TBI research Dihexa Synaptogenesis Oral/Injection Experimental research Cellular and Longevity Research Peptides These peptides target cellular-level mechanisms—immune function, telomere maintenance, mitochondrial function, and senescent cell research. NAD+ (Nicotinamide Adenine Dinucleotide) NAD+ is a coenzyme essential for cellular energy production, DNA repair, and sirtuin activation. Research focuses on its role in mitochondrial function and aging pathway modulation. Cellular energy production pathway research Sirtuin activation studies DNA repair mechanism research Age-related NAD+ decline studies NAD+ is technically a dinucleotide coenzyme, not a peptide — for a full classification breakdown, see our Is NAD+ a Peptide? research guide. For a deep dive into the clinical benefits and how NAD+ injections are administered, see our guide on what NAD injections are good for . Humanin Humanin is a mitochondrial-derived peptide (MDP) with cytoprotective and anti-apoptotic properties. Research explores its potential in neuroprotection and age-related cellular pathway studies. Mitochondrial-derived peptide research Neuroprotection pathway studies Anti-apoptotic mechanism research Age-related cognitive research applications Thymosin Alpha-1 A peptide naturally produced by the thymus gland that modulates immune function pathways. T-cell function pathway research FDA-orphan drug status for specific applications Chronic viral research applications Adjunct research in oncology studies Epithalon (Epitalon) A synthetic version of epithalamin that activates telomerase—the enzyme maintaining telomere length. Telomerase enzyme activation research Cellular aging pathway studies Sleep architecture research Documented studies in elderly populations For telomere and longevity pathway studies, see our research peptide catalog for the current research format. FOXO4-DRI A research peptide targeting senescent cells—"zombie cells" that accumulate with age. Research examines selective apoptosis induction. Selective senescent cell targeting research Age-related dysfunction studies Primarily in research phase Potential age-reversal research applications For hormonal and menopause-related peptide research, see our Peptides for Menopause guide covering published clinical studies. Peptide Cellular Mechanism Research Stage Key Studies Epithalon Telomerase activation Human trials conducted Lifespan studies in animal models FOXO4-DRI Senescent cell clearance Early research Aging marker studies in animal models Humanin Cellular protection Observational studies Longevity association research Thymosin Alpha-1 Immune optimization Clinically used Approved in some countries Research Protocol Considerations With diverse compounds available, research protocol design depends on several key considerations: 1. Define Research Objectives Research objectives guide compound selection: Skin and connective tissue: GHK-Cu, Matrixyl compounds Tissue repair: BPC-157 and TB-500 protocols Metabolic pathways: AOD-9604, or GLP-1 agonists Growth hormone pathways: Ipamorelin + CJC-1295, GHRP-6 Cognitive research: Semax, Selank Cellular/longevity: Epithalon, Thymosin Alpha-1 2. Administration Route Selection Different peptides require different administration methods based on their pharmacokinetic properties: Topical: Skincare peptides like Matrixyl and Argireline Subcutaneous injection: Most research peptides (BPC-157, TB-500, GH secretagogues) Intranasal: Cognitive peptides like Semax and Selank Oral: Some peptides have oral formulations, though bioavailability varies 3. Quality Verification Peptide quality varies between sources. Research protocols should include: Third-party testing with certificates of analysis Independent lab verification (Janoshik, Finnrick) Proper storage and shipping condition verification Supplier reputation and reship guarantees 4. Published Literature Review Every research peptide has documented literature. Key considerations include: Published trial methodology and endpoints Documented observation profiles Pharmacokinetic data Potential pathway interactions Frequently Asked Questions What's the difference between peptides and proteins? Size. Peptides are shorter chains of amino acids (typically 2-50), while proteins are longer (50+). This makes peptides generally easier to synthesize and often more targeted in their receptor interactions. What peptides are there for research use? The main types of peptides for research include tissue repair peptides (BPC-157, TB-500), metabolic peptides (Semaglutide, Tirzepatide, Retatrutide), cognitive peptides (Semax, Selank), growth hormone secretagogues (Ipamorelin, CJC-1295), and cellular/longevity peptides (Epithalon, Thymosin Alpha-1). This article provides a comprehensive peptide list organized by mechanism. What is the list of legal peptides? In most jurisdictions, peptides sold for "research purposes only" are legal to purchase. This list of legal peptides includes compounds like BPC-157, TB-500, GHK-Cu, and most growth hormone secretagogues. FDA-approved peptides like Semaglutide (Ozempic/Wegovy) and Tirzepatide (Mounjaro/Zepbound) have a different regulatory status as prescription medications. For a full breakdown of prescription requirements, see our guide: Do You Need a Prescription for Peptides? Always verify local regulations before purchasing. Are research peptides safe? Safety depends on vendor quality, third-party testing, and proper handling. Not all peptide suppliers are equal—purity, contamination testing, and COA documentation matter significantly. Read our comprehensive guide on Are Research Peptides Safe? for evaluation criteria and red flags to watch for. What are the most researched peptides? BPC-157 has extensive research literature, though much is animal-based. For human clinical research, GLP-1 analogs (like Semaglutide) have the most robust published data, leading to FDA approvals. Can multiple peptides be researched together? Yes, many peptides are commonly studied in combination. BPC-157 and TB-500 are often researched together for tissue repair. Ipamorelin and CJC-1295 are typically combined for growth hormone pathway research. Combined protocols should follow established research methodology. How should peptides be stored? Most peptides should be stored in the refrigerator once reconstituted. Lyophilized (freeze-dried) peptides can be stored at room temperature but last longer refrigerated. Always protect from light and avoid freezing reconstituted peptides. Use our free Peptide Calculator to determine concentration and syringe measurements for your research protocols. If you need a standard diluent for reconstitution workflows, see our bacteriostatic water product page or use our Bacteriostatic Water Calculator to determine the right volume for your vial. What research peptides target tissue repair? BPC-157 and TB-500 are the most researched for tissue repair applications. BPC-157 is particularly studied for tendon, ligament, and gastrointestinal tissue. TB-500 research focuses on soft tissue repair and inflammation pathways. For a detailed comparison, see our BPC-157 vs TB-500 research guide. Joe Rogan has discussed both compounds on his podcast — see our Joe Rogan Peptides episode breakdown. What peptides are studied for cognitive research? Semax and Selank are the most established. Semax research focuses on memory and focus pathways, while Selank studies examine anxiety-related mechanisms. Dihexa shows promise for synaptogenesis research, though it's still considered experimental. Do peptides require cycling in research protocols? Some do, some don't. Growth hormone secretagogues are often cycled in research to maintain receptor sensitivity. Tissue repair peptides are typically researched until endpoints are reached. Cognitive peptides may be studied continuously or cycled depending on the protocol. How do I know if a peptide is high quality? Always verify with independent third-party testing. Send samples to labs like Janoshik or Finnrick before research use. Reputable suppliers provide vendor COAs and offer reship guarantees if independent testing shows low purity. Is there a list of peptides and what they do PDF available? This article serves as a comprehensive peptides and what they do list that you can bookmark or save for offline reference. While we don't offer a formal PDF download, this page covers every peptide category—tissue repair, metabolic, cognitive, and cellular—in detail for your research needs. How do I choose peptides according to goals? Selecting peptides according to goals depends on your research objectives. For tissue repair research, focus on BPC-157 and TB-500. For metabolic studies, consider GLP-1 agonists like Semaglutide or Retatrutide. For cognitive research, the nootropic peptides list includes Semax and Selank. For cellular longevity, examine Epithalon and Thymosin Alpha-1. What are the different types of peptides and what they do? The different types of peptides and what they do can be organized into four main categories: tissue repair peptides (BPC-157, TB-500, GHK-Cu) promote healing pathways; metabolic peptides (Semaglutide, Tirzepatide, Retatrutide) regulate appetite and energy; cognitive peptides (Semax, Selank, Dihexa) target brain function; and cellular peptides (Epithalon, Thymosin Alpha-1) focus on immune and longevity pathways. Where can I find a complete list of names of peptides? This guide provides a comprehensive list of names of peptides organized by research category. Key names include BPC-157, TB-500, GHK-Cu, Semaglutide, Tirzepatide, Retatrutide, AOD-9604, Ipamorelin, CJC-1295, Semax, Selank, Epithalon, Thymosin Alpha-1, and many more covered in each section above. References U.S. Food and Drug Administration. Drugs@FDA: FDA-Approved Drugs database. accessdata.fda.gov U.S. Food and Drug Administration. Novel Drug Approvals. fda.gov Sikiric P, et al. Stable gastric pentadecapeptide BPC 157: novel therapy in gastrointestinal tract. Curr Pharm Des . 2011;17(16):1612-32. PubMed Goldstein AL, et al. Thymosin beta4: actin-sequestering protein moonlights to repair injured tissues. Trends Mol Med . 2005;11(9):421-9. PubMed Pickart L, Margolina A. Regenerative and protective actions of the GHK-Cu peptide. Int J Mol Sci . 2018;19(7):1987. PubMed Wilding JPH, et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. N Engl J Med . 2021;384:989. PubMed Jastreboff AM, et al. Triple-Hormone-Receptor Agonist Retatrutide for Obesity — Phase 2 Trial. N Engl J Med . 2023;389:514-526. PubMed Raun K, et al. Ipamorelin, the first selective growth hormone secretagogue. Eur J Endocrinol . 1998;139(5):552-61. PubMed Ashmarin IP, et al. 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