The peptide research
reference library.
Straightforward educational overviews of 15 peptides currently in the research conversation — from FDA-approved prescription medications to compounds still in preclinical trials. Every page cites its sources.
15
Peptides covered
4
FDA-approved
5
In Phase 3 trials
50+
Peer-reviewed references
Educational content only. The information on these pages is for educational purposes only. It does not constitute medical advice, diagnosis, or treatment recommendations. Always consult a qualified healthcare professional before making decisions related to any medication or health intervention. Regulations and product availability vary by country and jurisdiction.
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Weight Management
Peptides studied in metabolic contexts — including FDA-approved GLP-1/GIP receptor agonists and investigational compounds involved in appetite regulation and fat metabolism.
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Muscle Growth
Growth hormone secretagogues and peptides studied in contexts of body composition, lean mass, and anabolic signaling. Most are investigational or compounded.
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Workout Recovery
Peptides studied for potential roles in tissue repair, wound healing, and musculoskeletal recovery. Most evidence is preclinical.
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Skin & Beauty
Peptides investigated for skin biology, collagen synthesis, and pigmentation — spanning commercial cosmetic ingredients and investigational compounds.
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Longevity
Peptides associated with cellular health, mitochondrial function, and age-related physiological pathways. Evidence ranges from early-stage to investigational.
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Chronic Pain
Peptides studied for anti-inflammatory and tissue-repair mechanisms relevant to chronic pain contexts. Human data is generally limited.
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Immune Support
Peptides that modulate immune function — from the relatively well-characterized thymosin class to early-stage antimicrobial peptides.
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Cognitive & Sleep
Peptides studied for neuroprotective, anxiolytic, and cognitive effects. Most evidence comes from Russian clinical programs or early-phase research.
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GLP-1, GIP, and glucagon receptor agonists — the most clinically active peptide class in current research, including FDA-approved and investigational agents for metabolic health.
Tirzepatide
Tirzepatide is a synthetic peptide that activates two receptors involved in metabolic signaling: the glucose-dependent insulinotropic polypeptide (GIP) recept…
Semaglutide
Semaglutide is a synthetic peptide analog of human glucagon-like peptide-1 (GLP-1) developed by Novo Nordisk. It activates the GLP-1 receptor, which plays a r…
Retatrutide
LY3437943
Retatrutide (LY3437943) is an investigational synthetic peptide developed by Eli Lilly. It is classified as a triple hormone receptor agonist, meaning it acti…
Mazdutide
IBI362
Mazdutide (IBI362) is a synthetic peptide developed by Innovent Biologics (under license from Eli Lilly) that acts as a dual agonist at both the glucagon-like…
Survodutide
BI 456906
Survodutide (BI 456906) is an investigational synthetic peptide developed by Boehringer Ingelheim that acts as a dual agonist at the glucagon-like peptide-1 (…
Cagrilintide
CagriSema (combination)
Cagrilintide is a long-acting synthetic analog of amylin, a peptide hormone co-secreted with insulin from pancreatic beta cells. Amylin plays a role in slowin…
GHRH analogs and ghrelin receptor agonists that stimulate pituitary GH release. Ranges from the FDA-approved tesamorelin to commonly compounded and research-only peptides.
CJC-1295
GHRH Analog (with DAC)
CJC-1295 is a synthetic peptide analog of growth hormone-releasing hormone (GHRH). It consists of the first 29 amino acids of GHRH with chemical modifications…
Ipamorelin
GHS-R1a Agonist (selective)
Ipamorelin is a synthetic pentapeptide that acts as a selective growth hormone secretagogue (GHS). It works by binding to the ghrelin receptor (also known as …
Sermorelin
GRF 1-29 / GHRH 1-29
Sermorelin (also known as GRF 1-29 or GHRH 1-29) is a synthetic peptide consisting of the first 29 amino acids of human growth hormone-releasing hormone (GHRH…
Tesamorelin
Egrifta / Egrifta WR
Tesamorelin is a synthetic 44-amino acid peptide analog of human growth hormone-releasing hormone (GHRH), developed by Theratechnologies. It preserves the ful…
Peptides studied for wound healing, musculoskeletal repair, and skin biology — primarily in preclinical settings. Most lack human clinical trial data.
BPC-157
Body Protection Compound-157
BPC-157 (Body Protection Compound-157) is a synthetic peptide consisting of 15 amino acids. It is derived from a sequence found in human gastric juice and is …
TB-500
Thymosin Beta-4 Fragment
TB-500 is a synthetic peptide fragment derived from thymosin beta-4 (Tβ4), a naturally occurring 43-amino-acid protein found in virtually all human and animal…
GHK-Cu
Glycyl-L-Histidyl-L-Lysine Copper
GHK-Cu (glycyl-L-histidyl-L-lysine copper) is a naturally occurring copper-binding tripeptide first identified in human blood plasma. It consists of three ami…
Melanocortin receptor agonists with diverse effects on pigmentation, sexual function, and appetite. Includes the FDA-approved bremelanotide (Vyleesi) and the unapproved Melanotan II.
Melanotan II
MT-II
Melanotan II is a synthetic cyclic peptide analog of alpha-melanocyte-stimulating hormone (α-MSH), originally developed at the University of Arizona in the 19…
PT-141
Bremelanotide / Vyleesi
PT-141, known by its generic name bremelanotide, is a synthetic cyclic heptapeptide derived from Melanotan II. It acts as an agonist at melanocortin receptors…
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