List of Injectable Peptides

List of Injectable Peptides. Complete list of injectable peptides for research including GLP-1s, growth hormone secretagogues, and healing peptides with pricing. Key Takeaways Injectable peptides offer superior bioavailability compared to oral or nasal routes, with subcutaneous injection being the most common administration method FDA-approved injectable GLP-1 agonists like semaglutide and tirzepatide are available through licensed telehealth platforms Research-grade injectable peptides span categories including metabolic, healing, anti-aging, sleep, and growth hormone secretagogues Proper reconstitution and sterile technique are essential for any injectable peptide preparation Pricing varies widely from under $150/month for compounded GLP-1s to over $1,000 for specialty research compounds What Are Injectable Peptides? Injectable peptides are short-chain amino acid compounds administered via subcutaneous (under the skin) or intramuscular injection. Injection is the preferred delivery route for most peptides because it bypasses the digestive system, where stomach acid and enzymes would break down the peptide chains before they reach the bloodstream. Subcutaneous injection delivers peptides directly into the fatty tissue just beneath the skin, typically in the abdomen, thigh, or upper arm. This route provides bioavailability rates of 65-95% depending on the compound, compared to oral peptides which often achieve less than 5% bioavailability due to first-pass metabolism in the liver and enzymatic degradation in the gut. The list of injectable peptides below is organized into two categories: FDA-approved medications available through licensed providers, and research-grade peptides sold for laboratory use. Understanding the distinction between these categories is important for anyone researching peptide compounds. List of Injectable Peptides and What They Do If you are looking for a list of injectable peptides and what they do , the practical way to organize them is by function: metabolic GLP-1 compounds, tissue-repair peptides, growth-hormone-axis peptides, mitochondrial peptides, sleep or nootropic peptides, and FDA-approved prescription injectables. The tables and product cards below separate those categories so you can compare the compound, route, regulatory status, and primary research area without mixing prescription medications with research-only peptides. In short: semaglutide and tirzepatide are GLP-1 injectables used clinically for metabolic indications; BPC-157, TB-500, and GHK-Cu are research-only tissue or repair-focused peptides; CJC-1295, ipamorelin, sermorelin, and tesamorelin relate to growth-hormone-axis research; MOTS-c and SS-31 are mitochondrial research peptides; and compounds like DSIP, Selank, and Semax are studied in sleep or neuroactive contexts. FDA-Approved Injectable GLP-1 Medications These injectable peptide medications are available through licensed telehealth platforms with a prescription. GLP-1 receptor agonists like semaglutide and tirzepatide have become the most widely prescribed injectable peptides in the United States, with FDA approval for weight management and metabolic health. FDA-Approved Compound Compounded Semaglutide (Eden) — $149 first month, then $229/mo Compounded semaglutide injection prescribed through Eden's licensed telehealth platform. Includes medical consultation, ongoing provider support, and home delivery of pre-filled injection pens. Get Started → FDA-Approved Compound Compounded Tirzepatide (Eden) — $249 first month, then $329/mo Compounded tirzepatide is a dual GIP/GLP-1 receptor agonist prescribed through Eden. Includes medical evaluation, dose titration guidance, and monthly home delivery. Get Started → Brand-Name Medication Wegovy Injection — FDA-approved reference Brand-name Wegovy (semaglutide 2.4mg) is an FDA-approved semaglutide injection for weight management. Compare current partner offers for GLP-1 access before choosing a provider. Brand-Name Medication Zepbound Injection — FDA-approved reference Brand-name Zepbound (tirzepatide) is an FDA-approved dual GIP/GLP-1 agonist for weight management. Compare current partner offers for GLP-1 access before choosing a provider. Prescription Compound NAD+ Injections — $192/mo NAD+ (nicotinamide adenine dinucleotide) injectable available through Yucca Health. NAD+ is a coenzyme involved in cellular energy production and DNA repair. Includes telehealth consultation and home delivery. Get Started → Research-Grade Injectable Peptides The following injectable peptides are sold for research and laboratory use. They are not FDA-approved medications and are not intended for human consumption. This list of injectable peptides covers the most commonly studied compounds across metabolic, healing, anti-aging, and growth hormone research categories. Metabolic & Weight Management Peptides Research Peptide Retatrutide — $238 Triple-agonist peptide targeting GLP-1, GIP, and glucagon receptors simultaneously. Phase 2 clinical trials showed significant metabolic effects. One of the most studied next-generation injectable peptides in the GLP-1 class. View Product → Research Peptide Tirzepatide (Research Grade) — $297 Dual GIP/GLP-1 receptor agonist available in research-grade lyophilized form. The same active compound as Zepbound and Mounjaro, sold for laboratory investigation purposes only. Currently Unavailable Research Peptide MOTS-c — $290 Mitochondrial-derived peptide studied for its role in metabolic regulation and exercise mimetic effects. Research suggests MOTS-c activates AMPK pathways involved in glucose metabolism and cellular energy balance. View Product → Healing & Recovery Peptides Research Peptide BPC-157 — From $223 Body Protection Compound-157, a 15-amino-acid peptide derived from gastric juice proteins. One of the most widely researched injectable peptides, with preclinical studies examining its effects on tissue repair, angiogenesis, and gut healing. View Product → Research Peptide TB-500 — $325 Thymosin Beta-4 fragment studied for its role in cell migration, wound healing, and inflammation modulation. TB-500 is frequently researched alongside BPC-157 in tissue repair studies and is one of the most recognized injectable peptides in recovery research. View Product → Research Peptide KPV — $326 A tripeptide (Lys-Pro-Val) derived from alpha-MSH studied for anti-inflammatory properties. Preclinical research has investigated KPV in the context of gut inflammation, colitis models, and immune modulation. View Product → Anti-Aging & Longevity Peptides Research Peptide GHK-Cu — $183 Copper peptide naturally present in human plasma. GHK-Cu levels decline with age, and research has examined its role in collagen synthesis, skin remodeling, and tissue regeneration. Available as an injectable for research applications. View Product → Research Peptide SS-31 (Elamipretide) — $1,013 Mitochondria-targeted tetrapeptide that concentrates in the inner mitochondrial membrane. Research focuses on its potential to stabilize cardiolipin and restore mitochondrial function in aging-related studies. One of the more expensive injectable peptides due to synthesis complexity. View Product → Research Peptide Humanin — $540 Mitochondrial-derived peptide originally discovered in Alzheimer's research. Studies investigate humanin's cytoprotective properties and its role in cellular stress response, apoptosis regulation, and neuroprotection. View Product → Growth Hormone Secretagogue Peptides Research Peptide CJC-1295 + Ipamorelin — $380 Popular combination of a growth hormone releasing hormone (GHRH) analog and a selective growth hormone secretagogue. Research investigates the synergistic effect of combining CJC-1295 (which extends GH release duration) with Ipamorelin (which triggers GH pulses). View Product → Research Peptide Ipamorelin — $218 Selective growth hormone secretagogue peptide that stimulates GH release without significantly affecting cortisol or prolactin levels. One of the most studied injectable peptides in the GHS category for its clean secretion profile. View Product → Research Peptide Sermorelin — $303 A 29-amino-acid analog of growth hormone releasing hormone (GHRH). Sermorelin was previously FDA-approved as Geref for diagnostic use, and remains one of the most well-characterized injectable peptides in growth hormone research. View Product → Specialty Research Peptides Research Peptide PT-141 (Bremelanotide) Melanocortin receptor agonist originally derived from Melanotan II. PT-141 acts on the central nervous system rather than the vascular system. The branded version (Vyleesi) received FDA approval for hypoactive sexual desire disorder in premenopausal women. View Product → Research Peptide DSIP — $290 Delta Sleep-Inducing Peptide, a neuromodulator studied for its effects on sleep architecture, stress response, and circadian rhythm regulation. Research has examined DSIP's ability to promote delta-wave sleep patterns in animal models. View Product → How Injectable Peptides Are Administered All injectable peptides on this list follow a similar preparation and administration process. Research-grade peptides are supplied as lyophilized (freeze-dried) powder in sealed vials. Before use, peptides must be reconstituted with bacteriostatic water. Reconstitution Process Reconstitution involves injecting a precise amount of bacteriostatic water into the peptide vial using a sterile syringe. The water should be directed down the side of the vial rather than directly onto the powder to avoid damaging the peptide structure. Gently swirl the vial until the powder dissolves completely — never shake it. The amount of bacteriostatic water used determines the concentration per unit of volume, which directly affects dosing accuracy. Use our peptide reconstitution calculator to determine the correct water volume and dosing for any injectable peptide on this list. Subcutaneous Injection Technique Most injectable peptides are administered subcutaneously using insulin syringes (typically 29-31 gauge, 0.5-1mL). The injection is given into the fatty tissue of the abdomen (rotating sites with each injection), upper thigh, or back of the upper arm. The needle is inserted at a 45-90 degree angle depending on the amount of subcutaneous tissue at the site. Proper storage after reconstitution is critical. Most reconstituted injectable peptides should be refrigerated at 2-8 degrees Celsius and used within 30 days, though specific stability windows vary by compound. For the full storage breakdown, see our guide to how long reconstituted peptides last . If the vial or supplies need to leave home, review how to travel with peptides before choosing a carry-on, cooler, or hotel refrigerator setup. Injectable vs Oral vs Nasal Peptide Delivery Understanding why injection is the primary delivery route for most peptides requires comparing the three main administration methods. Injectable (Subcutaneous) Subcutaneous injection provides the highest and most predictable bioavailability for most peptides, typically 65-95%. The peptide enters the bloodstream directly through capillary absorption in subcutaneous tissue, bypassing the digestive system entirely. This is why the majority of peptides on this list are formulated as injectables. Oral Peptides Oral delivery faces the challenge of peptide degradation by stomach acid and digestive enzymes, followed by first-pass metabolism in the liver. Bioavailability for oral peptides is generally below 5%, though newer formulations using absorption enhancers (like the SNAC technology in oral semaglutide/Rybelsus) have improved uptake for specific compounds. Nasal Spray Intranasal delivery offers a middle ground with bioavailability typically ranging from 10-30%. The nasal mucosa provides a large absorptive surface area and avoids first-pass metabolism, but absorption rates are less predictable than injection. Some smaller peptides like oxytocin and certain GH secretagogues can be effectively delivered nasally. Use our nasal spray dosing calculator to convert between delivery routes. Why Most Research Peptides Are Injectable For the research-grade peptides listed above, subcutaneous injection remains the standard because it preserves the peptide structure intact and delivers a known quantity to the bloodstream. Oral formulation of most peptides would require extensive excipient development to protect against enzymatic degradation, making injection the most practical and reliable route for research applications. Understanding the Injectable Peptides List This list of injectable peptides represents the most commonly researched and commercially available compounds as of 2026. The field is expanding rapidly — new peptides enter research pipelines regularly, and existing compounds like retatrutide continue advancing through clinical trials. For a broader overview of peptide compounds beyond injectables, including oral formulations and topical applications, see our complete list of peptides and what they do . If you are researching costs across different vendors and administration routes, our guide on how much peptide therapy costs breaks down pricing in detail. Frequently Asked Questions What are the most common injectable peptides? The most commonly researched injectable peptides include BPC-157 and TB-500 for healing research, CJC-1295 + Ipamorelin for growth hormone studies, and semaglutide and tirzepatide for metabolic research. Among FDA-approved injectables, Wegovy (semaglutide) and Zepbound (tirzepatide) are the most widely prescribed. What do injectable peptides do? Injectable peptides do different things depending on the compound class. GLP-1 injectables are used clinically or studied for metabolic signaling, BPC-157 and TB-500 are researched in tissue-repair models, CJC-1295 and ipamorelin are growth-hormone-axis research peptides, and MOTS-c or SS-31 are studied in mitochondrial and cellular-energy research. Why are peptides given as injections instead of pills? Peptides are chains of amino acids that get broken down by stomach acid and digestive enzymes when taken orally, resulting in bioavailability below 5% for most compounds. Subcutaneous injection bypasses the digestive system entirely, delivering 65-95% of the peptide intact to the bloodstream. This is why the vast majority of peptides are formulated as injectables. How do you reconstitute injectable peptides? Injectable peptides come as lyophilized (freeze-dried) powder and must be reconstituted with bacteriostatic water before use. Using a sterile syringe, inject the water slowly down the side of the vial, then gently swirl until dissolved. The amount of water determines the concentration. Use a peptide reconstitution calculator to determine the correct volume for your specific compound and desired dosage. How much do injectable peptides cost? Injectable peptide pricing varies widely by compound. FDA-approved compounded semaglutide starts at $149/month, while research-grade peptides range from $183 (GHK-Cu) to over $1,000 (SS-31). Most common research peptides like BPC-157, Ipamorelin, and Retatrutide fall in the $218-$380 range per vial. Are injectable peptides legal to buy? FDA-approved injectable peptides like semaglutide (Wegovy) and tirzepatide (Zepbound) require a prescription and are legal to purchase through licensed pharmacies and telehealth platforms. Research-grade injectable peptides are legal to purchase for laboratory and research use in most jurisdictions, but are not approved for human consumption. Regulations vary by country and compound. 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