Comprehensive, research-backed information on peptide mechanisms, clinical applications, dosing protocols, and stacks — written for researchers and health professionals.
Peptides are molecules composed of 2 to 50 amino acids linked by peptide bonds. Unlike large proteins, their small size allows them to interact precisely with specific receptors, enzymes, and signaling pathways throughout the body.
Research-grade peptides are increasingly studied for their roles in tissue repair, growth hormone modulation, immune regulation, neurological function, and longevity pathways — often with high target specificity and low systemic toxicity.
Peptides bind to specific receptors, enabling targeted action with minimal off-target effects.
Most peptides are rapidly metabolized, requiring precise timing and dosing strategies.
Subcutaneous injection is most common; some peptides are active intranasally or orally.
Individual peptide profiles covering mechanism of action, typical dosing, administration route, half-life, and research status.
Synthetic pentadecapeptide derived from gastric protein. Promotes tendon, ligament, and gut healing via upregulation of growth factor receptors and angiogenesis. Extensively studied in rodent models.
Synthetic analogue of Thymosin β4. Promotes actin regulation, cell migration, and tissue repair. Commonly paired with BPC-157 for enhanced healing outcomes in connective tissue injuries.
Long-acting GHRH analogue with Drug Affinity Complex (DAC). Extends half-life to ~6–8 days via albumin binding. Produces sustained, pulsatile GH and IGF-1 elevation.
Selective ghrelin receptor agonist with minimal cortisol and prolactin side effects. Produces clean, pulsatile GH release. Frequently combined with CJC-1295 for synergistic effect.
Anxiolytic and nootropic peptide developed in Russia. Modulates GABA-A receptor function and upregulates BDNF. Intranasal delivery crosses the blood-brain barrier effectively.
ACTH-derived nootropic peptide. Increases BDNF, NGF, and serotonin metabolism. Used clinically in Russia for stroke recovery and cognitive enhancement. Strong neuroprotective profile.
Naturally occurring copper-binding tripeptide. Stimulates collagen, elastin, and glycosaminoglycan synthesis. Strong antioxidant and anti-inflammatory properties. Used topically and systemically.
Tetrapeptide that activates telomerase and elongates telomeres. Modulates pineal gland function and melatonin production. Associated with lifespan extension in animal models.
FDA-cleared immunomodulatory peptide (as Thymalfasin / Zadaxin). Enhances T-cell maturation, dendritic cell function, and innate immunity. Used clinically for chronic hepatitis and immunosuppression.
Commonly studied peptide combinations organized by therapeutic goal. Dosing is for reference only. Consult a qualified physician before use.
Clear answers to the most common questions about peptide research and use.
All content on Merellrx.com is provided for educational and informational purposes only. The information presented does not constitute medical advice, diagnosis, or treatment. Research peptides discussed on this site are not FDA-approved for human use unless explicitly noted. Always consult a licensed healthcare professional before initiating any peptide protocol. Dosing, cycling, and administration information reflects commonly reported research use and should not be interpreted as clinical guidance.