The Science — Stemcode Peptides

Research-Grade Quality. Verified at Every Step.

From synthesis to your lab bench, every Stemcode product undergoes rigorous quality control. We publish full documentation so you can verify everything we claim.

Built on Rigorous Science

From synthesis to your doorstep, every step is engineered for maximum purity, stability, and bioavailability.

HPLC-Verified Purity on Every Batch

Every peptide we ship undergoes High-Performance Liquid Chromatography (HPLC) analysis, the gold standard in analytical chemistry. Our third-party labs verify identity, purity, and potency before any product leaves the facility.

We publish full Certificates of Analysis (COAs) for every batch so researchers can verify the integrity of their materials before use.

Precision-Engineered Formulations

Our nasal spray formulations are buffered to pH 6.0 for optimal mucosal compatibility. Each formula includes Benzalkonium Chloride (BKC) at 0.01% as a preservative, ensuring sterility throughout the product's shelf life.

We use pharmaceutical-grade excipients and USP-grade water. Every formulation parameter is documented, tested, and reproducible across batches.

Multiple Delivery Formats

Our peptides are available in three delivery formats, each optimized for different research applications and bioavailability profiles.

Nasal Sprays

Metered-dose nasal delivery for rapid absorption. Each spray delivers a precise, consistent dose with our calibrated actuator system.

Metered-dose actuator

pH-buffered formula

Preservative included

Tablets

Oral capsule and tablet forms for gastrointestinal research applications. Standardized dosing in convenient capsule format.

Precise dosing per capsule

GMP-manufactured

Shelf-stable

Topical Sprays

Topical formulations for dermatological and wound-healing research. Designed for transdermal peptide delivery studies.

Transdermal absorption

Research-optimized base

Consistent coverage

Temperature-Controlled Shipping

Peptides are sensitive compounds that can degrade with heat exposure. Our secure packaging and fast shipping ensure your research materials arrive in pristine condition, every time.

We use insulated packaging with gel ice packs for all shipments. Overnight and expedited options keep transit times minimal, and temperature indicators verify chain-of-custody integrity.

Double-walled containers with reflective thermal liners maintain stable internal temperatures.

Phase-change gel packs keep product temperature between 2–8°C throughout transit.

Priority nationwide shipping minimizes time in transit. Overnight options available.

Every package includes a temperature indicator strip to verify product integrity on arrival.

From Synthesis to Delivery

A transparent, end-to-end quality chain ensures every product meets the Stemcode standard.

Peptide Synthesis

Peptides are synthesized using solid-phase peptide synthesis (SPPS) in cGMP-compliant facilities. Raw materials are sourced from qualified pharmaceutical-grade suppliers.

Purification

Crude peptides undergo preparative HPLC purification to remove synthesis byproducts and achieve the target purity of 99%+. Multiple purification cycles may be used for complex sequences.

Quality Testing

Every batch is sent to independent, ISO-certified third-party laboratories for HPLC purity analysis, mass spectrometry identity confirmation, and endotoxin testing. Results are published as Certificates of Analysis.

Formulation

Purified peptides are formulated into their final delivery format (nasal spray, tablets, topical spray) using optimized buffers, pharmaceutical-grade excipients, and BKC preservative in controlled environments.

Controlled Storage

Finished products are stored at 2-8 degrees C in monitored refrigeration units. Inventory is tracked by lot number and batch, with full traceability maintained.

Insulated Shipping

Orders are packed with thermal-insulated shippers and gel ice packs. Priority carriers ensure 1-3 day delivery so peptides arrive at the correct temperature.

Peer-Reviewed Studies

Our compounds are backed by published, peer-reviewed scientific literature. Click any compound to explore the research.

BPC-157 is a 15-amino acid peptide fragment derived from human gastric juice. It has been extensively studied in pre-clinical models across gastrointestinal, musculoskeletal, and neurological research contexts.

Curr Pharm Des (2018). “BPC 157 and Standard Angiogenic Growth Factors. Gastrointestinal Tract Healing, Lessons from Tendon, Ligament, Muscle and Bone Healing.” View source ↗

J Physiol Paris (1997). “BPC 157's effect on healing.” View source ↗

Vasc Pharmacol (2018). “Rat inferior caval vein (ICV) ligature and particular new insights with the stable gastric pentadecapeptide BPC 157.” View source ↗

Molecules (2014). “Pentadecapeptide BPC 157 enhances the growth hormone receptor expression in tendon fibroblasts.” View source ↗

World J Gastroenterol (2017). “Stable gastric pentadecapeptide BPC 157 in the treatment of colitis and ischemia and reperfusion in rats: New insights.” View source ↗

GHK-Cu is a naturally occurring tripeptide-copper complex with documented effects on gene expression, collagen synthesis, and extracellular matrix remodeling in published literature.

Int J Mol Sci (2018). “Regenerative and protective actions of the GHK-Cu peptide in the light of new gene data.” View source ↗

BioMed Res Int (2015). “GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration.” View source ↗

Cosmetics (2012). “GHK-Cu may prevent oxidative stress in skin by regulating copper and modifying expression of numerous antioxidant genes.” View source ↗

J Pept Sci (2008). “The human tri-peptide GHK and tissue remodeling.” View source ↗

TB-500 is a synthetic fragment of Thymosin Beta-4, a naturally occurring 43-amino acid peptide. It is the primary actin-sequestering protein in mammalian cells and has been studied for its role in cell migration, angiogenesis, and tissue repair.

Expert Opin Biol Ther (2012). “Thymosin β4: a multi-functional regenerative peptide. Basic properties and clinical applications.” View source ↗

Ann N Y Acad Sci (2010). “Thymosin beta4 and corneal wound healing: visions of the future.” View source ↗

Nature (2004). “Thymosin beta4 activates integrin-linked kinase and promotes cardiac cell migration, survival and cardiac repair.” View source ↗

Semax is a synthetic heptapeptide derived from the ACTH(4-7) fragment with a Pro-Gly-Pro C-terminal extension. Developed at the Institute of Molecular Genetics in Moscow, it has been studied for nootropic and neuroprotective properties.

Zh Vyssh Nerv Deiat Im I P Pavlova (1997). “A nootropic adrenocorticotropin analog 4-10-semax (15 years experience in its design and study).” View source ↗

Zh Nevrol Psikhiatr Im S S Korsakova (2005). “Semax in prevention of disease progress and development of exacerbations in patients with cerebrovascular insufficiency.” View source ↗

Brain Res (2006). “Semax, an analog of ACTH(4-10) with cognitive effects, regulates BDNF and trkB expression in the rat hippocampus.” View source ↗

Epitalon (Ala-Glu-Asp-Gly) is a synthetic tetrapeptide studied by Prof. Vladimir Khavinson at the Saint Petersburg Institute of Bioregulation and Gerontology for its effects on telomerase activity and pineal gland function.

Bull Exp Biol Med (2003). “Epithalon peptide induces telomerase activity and telomere elongation in human somatic cells.” View source ↗

Biogerontology (2003). “Effect of Epitalon on biomarkers of aging, life span and spontaneous tumor incidence in female Swiss-derived SHR mice.” View source ↗

MOTS-c is a 16-amino acid peptide encoded within the mitochondrial 12S rRNA gene. Discovered by Dr. Changhan Lee at USC, it has been studied for its role in metabolic homeostasis and exercise physiology.

Cell Metab (2015). “The mitochondrial-derived peptide MOTS-c promotes metabolic homeostasis and reduces obesity and insulin resistance.” View source ↗

Nat Commun (2021). “MOTS-c is an exercise-induced mitochondrial-encoded regulator of age-dependent physical decline and muscle homeostasis.” View source ↗

Research Use Only. All references are to published peer-reviewed literature. No therapeutic claims are made or implied. Products are for laboratory research purposes only.

Ready to See the Data?

View our lab results and download Certificates of Analysis for any product.