General Questions
What are research peptides?
Research peptides are short chains of amino acids — the same building blocks that make up proteins — synthesized for use in scientific and laboratory research. They are studied for their potential roles in cellular signaling, tissue repair, hormone regulation, and metabolic function. All products on Cornerstone Peptides are strictly for research purposes and not intended for human consumption.
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How is my order shipped?
Orders are shipped in discreet, unmarked packaging within 24–48 hours of payment confirmation. Products are shipped refrigerated where required to maintain integrity.
Are these products tested for purity?
Yes. All batches are third-party tested for purity and potency before being made available. Lab certificates are available upon request.
BPC-157
What is BPC-157?
BPC-157 (Body Protection Compound-157) is a pentadecapeptide derived from a naturally occurring sequence found in human gastric juice. It consists of 15 amino acids and is one of the most extensively studied peptides in preclinical research.
What is BPC-157 mainly used for in research?
BPC-157 is primarily studied for its regenerative properties. Research has explored its role in accelerating the healing of tendons, ligaments, muscles, and gut tissue. It has also been investigated for its neuroprotective effects and its influence on nitric oxide production, which relates to blood vessel formation and tissue repair.
TB-500
What is TB-500?
TB-500 is a synthetic version of Thymosin Beta-4, a naturally occurring peptide found in high concentrations in blood platelets, wound fluid, and many other tissues. It plays a key role in actin regulation — a protein critical to cell structure and movement.
What is TB-500 mainly used for in research?
TB-500 is studied for its potential to promote tissue repair and reduce inflammation. Research has focused on its role in healing muscle, tendon, ligament, skin, and cardiac tissue. It is also examined for its ability to promote new blood vessel growth and improve flexibility in connective tissue.
GHK-Cu (Copper Peptide)
What is GHK-Cu?
GHK-Cu is a naturally occurring copper peptide complex found in human plasma, saliva, and urine. It is composed of a tripeptide (glycyl-histidyl-lysine) bound to a copper ion and is known to decline significantly with age.
What is GHK-Cu mainly used for in research?
GHK-Cu is studied for its wide range of biological activities including stimulation of collagen and glycosaminoglycan synthesis, anti-inflammatory effects, antioxidant activity, and tissue remodeling. Research also explores its potential role in wound healing, skin regeneration, and nerve tissue repair.
KPV
What is KPV?
KPV is a tripeptide (Lysine-Proline-Valine) derived from the C-terminal sequence of alpha-MSH (alpha-melanocyte-stimulating hormone). It is a naturally occurring anti-inflammatory fragment studied extensively in gut health and immune modulation research.
What is KPV mainly used for in research?
KPV is primarily studied for its potent anti-inflammatory and antimicrobial properties. Research has focused on its potential role in managing inflammatory bowel conditions, reducing intestinal inflammation, and modulating immune response. It is also studied for wound healing and skin inflammation applications.
Klow Blend (BPC-157 + TB-500 + GHK-Cu + KPV)
What is the Klow Blend?
The Klow Blend is a proprietary combination of four researched peptides: BPC-157, TB-500, GHK-Cu, and KPV. Each peptide has been individually studied for distinct regenerative and anti-inflammatory properties, and this blend combines them into a single formulation for multi-pathway research applications.
What is the Klow Blend mainly used for in research?
The Klow Blend is designed for research scenarios requiring broad-spectrum tissue repair and inflammation modulation. The combination is studied for its potential synergistic effects across connective tissue healing (BPC-157, TB-500), cellular regeneration and collagen support (GHK-Cu), and gut and immune system modulation (KPV).
Melanotan 2
What is Melanotan 2?
Melanotan 2 (MT-2) is a synthetic analog of alpha-MSH, a naturally occurring peptide in the body. It acts on melanocortin receptors and has been studied for its effects on pigmentation, sexual function, and appetite regulation.
What is Melanotan 2 mainly used for in research?
Research on Melanotan 2 has focused on three primary areas: stimulation of melanin production (skin darkening), its role in sexual function via the MC4R receptor pathway, and appetite suppression. It is also studied for potential applications in erection physiology and UV-independent tanning research.
Tirzepatide
What is Tirzepatide?
Tirzepatide is a dual GIP (glucose-dependent insulinotropic polypeptide) and GLP-1 (glucagon-like peptide-1) receptor agonist. It is a 39-amino acid synthetic peptide that simultaneously activates two incretin hormone receptors involved in metabolic regulation.
What is Tirzepatide mainly used for in research?
Tirzepatide is studied for its effects on blood glucose regulation, insulin secretion, appetite suppression, and body weight reduction. Research has shown its dual-receptor mechanism produces additive effects on metabolic parameters. It is also investigated for cardiovascular risk factor reduction and non-alcoholic fatty liver disease.
Retatrutide
What is Retatrutide?
Retatrutide is a triple agonist peptide that simultaneously activates GLP-1, GIP, and glucagon receptors — making it a next-generation incretin compound. Its triple-action mechanism distinguishes it from dual agonists like Tirzepatide.
What is Retatrutide mainly used for in research?
Retatrutide is among the most studied compounds for metabolic and weight-related research. Its triple receptor activation is investigated for synergistic effects on energy expenditure, appetite reduction, fat oxidation, and glucose homeostasis. Research has also explored its potential cardiovascular and hepatic benefits beyond those seen with single or dual agonists.
NAD+
What is NAD+?
Nicotinamide Adenine Dinucleotide (NAD+) is a coenzyme found in all living cells and central to cellular energy metabolism. It serves as a critical cofactor for enzymes involved in redox reactions, DNA repair, and gene expression regulation. NAD+ levels naturally decline with age.
What is NAD+ mainly used for in research?
NAD+ is studied for its role in mitochondrial function, cellular energy production (ATP synthesis), DNA damage repair, sirtuin pathway activation, and longevity-related mechanisms. Research explores its potential in neuroprotection, metabolic health, and cellular aging processes.
Tesamorelin
What is Tesamorelin?
Tesamorelin is a synthetic analog of growth hormone-releasing hormone (GHRH). It is a 44-amino acid peptide that stimulates the pituitary gland to produce and release growth hormone in a pulsatile, physiological manner.
What is Tesamorelin mainly used for in research?
Tesamorelin research focuses primarily on its ability to increase IGF-1 levels and reduce visceral adipose tissue (VAT) — the metabolically active fat stored around abdominal organs. It is also studied for cognitive function, muscle preservation, lipid metabolism, and its effects on body composition in research models.
MOTS-C
What is MOTS-C?
MOTS-C (Mitochondrial Open Reading Frame of the 12S rRNA-c) is a mitochondria-derived peptide encoded in the mitochondrial genome. It is a 16-amino acid peptide that acts as a mitochondrial signal to regulate metabolic homeostasis. MOTS-C levels decline with age and metabolic stress.
What is MOTS-C mainly used for in research?
MOTS-C is studied for its role in metabolic regulation, insulin sensitivity, and exercise-related physiology. Research has explored its capacity to activate AMPK pathways, improve glucose uptake, reduce fat accumulation, and enhance skeletal muscle function. It is also investigated for its relationship with longevity and age-related metabolic decline.
Testosterone Enanthate
What is Testosterone Enanthate?
Testosterone Enanthate is a long-acting ester of testosterone, the primary male sex hormone. The enanthate ester extends the release profile of testosterone, making it a slow-acting compound with a prolonged half-life compared to testosterone base.
What is Testosterone Enanthate mainly used for in research?
Testosterone Enanthate is used in research studying androgen receptor signaling, male hypogonadism models, muscle protein synthesis, bone density, red blood cell production, and hormone replacement protocols. It is also studied in the context of metabolic effects of androgens on adipose tissue, cardiovascular parameters, and cognitive function.
⚠️ All products are for research purposes only and are not intended for human consumption. Not for use by minors. These statements have not been evaluated by the FDA.