Research Library
The PX1 Research peptide library
Molecular profiles, reconstitution chemistry, storage and analytical testing for every compound we manufacture — plus head-to-head comparisons and lab-methods guides. Written as a precise scientific reference, for laboratory research use only.
Comparisons
ComparisonSemaglutide vs Tirzepatide vs PX1-R (Retatrutide)A structural comparison of three incretin-class research peptides by receptor classification, backbone length, molecular profile and supplied format.Read reference ComparisonBPC-157 vs TB-500A structural comparison of BPC-157 and TB-500 (thymosin beta-4 fragment) by classification, sequence length, molecular profile and supplied format.Read reference ComparisonSemax vs SelankA neutral structural reference comparing Semax and Selank by classification, peptide structure and physical format.Read reference ComparisonCJC-1295 vs IpamorelinA structural comparison of CJC-1295 and Ipamorelin — two different mechanisms of action on the growth-hormone axis.Read reference ComparisonIpamorelin vs SermorelinA structural comparison of Ipamorelin and Sermorelin by classification, molecular profile and supplied format.Read reference ComparisonMelanotan I vs Melanotan IIA structural comparison of Melanotan I and Melanotan II by classification, peptide structure and supplied format.Read reference
Methods & guides
GuideHow to Read a Certificate of AnalysisWhat each section of a peptide COA actually proves — identity, purity, net peptide content, endotoxin and sterility — and how to match a certificate to the vial in your hand.Read reference GuideBacteriostatic Water vs Sterile WaterThe chemistry difference between bacteriostatic and sterile water, why 0.9% benzyl alcohol matters for multi-use vials, and how each affects storage windows.Read reference GuidePeptide Storage & StabilityStorage rules for lyophilized and reconstituted research peptides: temperature, light, moisture, freeze-thaw and the degradation chemistry behind each rule.Read reference GuideHow HPLC and Mass Spectrometry Verify PurityHow reverse-phase HPLC quantifies purity and high-resolution mass spectrometry confirms identity — and why the two tests answer different questions.Read reference
GLP-1 & Metabolic
CompoundRetatrutide (GLP-3)Retatrutide (GLP-3) is supplied by PX1 Research as a lyophilized research-grade GIP/GLP-1/glucagon triple receptor agonist at ≥99% HPLC purity, for laboratory use only.Read reference CompoundTirzepatide (GLP-2)Tirzepatide (GLP-2) is supplied by PX1 Research as a lyophilized research-grade dual GIP/GLP-1 receptor agonist at ≥99% HPLC purity, for laboratory use only.Read reference CompoundSemaglutideSemaglutide is supplied by PX1 Research as a lyophilized research-grade GLP-1 receptor agonist at ≥99% HPLC purity, for laboratory use only.Read reference CompoundCagrilintideCagrilintide is supplied by PX1 Research as a lyophilized research-grade long-acting amylin analog at ≥99% HPLC purity, for laboratory use only.Read reference CompoundSurvodutideSurvodutide is supplied by PX1 Research as a lyophilized research-grade dual glucagon/GLP-1 receptor agonist at ≥99% HPLC purity, for laboratory use only.Read reference CompoundMazdutideMazdutide is supplied by PX1 Research as a lyophilized research-grade GLP-1/glucagon dual agonist at ≥99% HPLC purity, for laboratory use only.Read reference
Research Peptides
CompoundBPC-157BPC-157 is supplied by PX1 Research as a lyophilized research-grade synthetic pentadecapeptide derived from gastric juice protein BPC at ≥99% HPLC purity, for laboratory use only.Read reference CompoundTB-500 (Thymosin Beta-4)TB-500 (Thymosin Beta-4) is supplied by PX1 Research as a lyophilized research-grade synthetic fragment of thymosin beta-4 at ≥99% HPLC purity, for laboratory use only.Read reference CompoundGHK-CuGHK-Cu is supplied by PX1 Research as a lyophilized research-grade copper-binding tripeptide at ≥99% HPLC purity, for laboratory use only.Read reference CompoundKPVKPV is supplied by PX1 Research as a lyophilized research-grade C-terminal tripeptide of α-MSH at ≥99% HPLC purity, for laboratory use only.Read reference CompoundMOTS-cMOTS-c is supplied by PX1 Research as a lyophilized research-grade mitochondrial-derived peptide (16 aa) at ≥99% HPLC purity, for laboratory use only.Read reference CompoundSS-31 (Elamipretide)SS-31 (Elamipretide) is supplied by PX1 Research as a lyophilized research-grade mitochondria-targeting tetrapeptide (cardiolipin binder) at ≥99% HPLC purity, for laboratory use only.Read reference CompoundNAD+NAD+ is supplied by PX1 Research as a lyophilized research-grade nicotinamide adenine dinucleotide cofactor at ≥99% HPLC purity, for laboratory use only.Read reference CompoundEpithalon (Epitalon)Epithalon (Epitalon) is supplied by PX1 Research as a lyophilized research-grade synthetic tetrapeptide (Ala-Glu-Asp-Gly) at ≥99% HPLC purity, for laboratory use only.Read reference CompoundSemaxSemax is supplied by PX1 Research as a lyophilized research-grade ACTH(4-10) analog nootropic peptide at ≥99% HPLC purity, for laboratory use only.Read reference CompoundSelankSelank is supplied by PX1 Research as a lyophilized research-grade tuftsin analog heptapeptide at ≥99% HPLC purity, for laboratory use only.Read reference CompoundDSIPDSIP is supplied by PX1 Research as a lyophilized research-grade nonapeptide isolated from rabbit cerebral venous blood at ≥99% HPLC purity, for laboratory use only.Read reference CompoundPT-141 (Bremelanotide)PT-141 (Bremelanotide) is supplied by PX1 Research as a lyophilized research-grade melanocortin receptor agonist at ≥99% HPLC purity, for laboratory use only.Read reference CompoundMelanotan IIMelanotan II is supplied by PX1 Research as a lyophilized research-grade cyclic melanocortin analog at ≥99% HPLC purity, for laboratory use only.Read reference CompoundMelanotan I (Afamelanotide)Melanotan I (Afamelanotide) is supplied by PX1 Research as a lyophilized research-grade linear α-MSH analog at ≥99% HPLC purity, for laboratory use only.Read reference CompoundThymosin Alpha-1Thymosin Alpha-1 is supplied by PX1 Research as a lyophilized research-grade 28-amino-acid thymic peptide at ≥99% HPLC purity, for laboratory use only.Read reference CompoundKisspeptin-10Kisspeptin-10 is supplied by PX1 Research as a lyophilized research-grade KISS1R (GPR54) agonist decapeptide at ≥99% HPLC purity, for laboratory use only.Read reference CompoundGlutathioneGlutathione is supplied by PX1 Research as a lyophilized research-grade endogenous tripeptide antioxidant at ≥99% HPLC purity, for laboratory use only.Read reference Compound5-Amino-1MQ5-Amino-1MQ is supplied by PX1 Research as a lyophilized research-grade small-molecule NNMT inhibitor at ≥99% HPLC purity, for laboratory use only.Read reference CompoundSLU-PP-332SLU-PP-332 is supplied by PX1 Research as a lyophilized research-grade pan-ERR agonist (exercise-mimetic small molecule) at ≥99% HPLC purity, for laboratory use only.Read reference CompoundAOD-9604AOD-9604 is supplied by PX1 Research as a lyophilized research-grade hGH fragment 176-191 analog at ≥99% HPLC purity, for laboratory use only.Read reference CompoundARA-290 (Cibinetide)ARA-290 (Cibinetide) is supplied by PX1 Research as a lyophilized research-grade erythropoietin helix-B surface peptide at ≥99% HPLC purity, for laboratory use only.Read reference CompoundLL-37LL-37 is supplied by PX1 Research as a lyophilized research-grade human cathelicidin antimicrobial peptide at ≥99% HPLC purity, for laboratory use only.Read reference CompoundOxytocinOxytocin is supplied by PX1 Research as a lyophilized research-grade nonapeptide neurohypophysial hormone at ≥99% HPLC purity, for laboratory use only.Read reference CompoundSNAP-8SNAP-8 is supplied by PX1 Research as a lyophilized research-grade acetyl octapeptide-3 (SNARE-mimetic) at ≥99% HPLC purity, for laboratory use only.Read reference CompoundAdamaxAdamax is supplied by PX1 Research as a lyophilized research-grade cyclic dipeptide nootropic (Noopept analog) at ≥99% HPLC purity, for laboratory use only.Read reference CompoundDihexaDihexa is supplied by PX1 Research as a lyophilized research-grade angiotensin IV derivative (HGF/c-Met modulator) at ≥99% HPLC purity, for laboratory use only.Read reference CompoundAHK-CuAHK-Cu is supplied by PX1 Research as a lyophilized research-grade copper-binding tripeptide (Ala-His-Lys) at ≥99% HPLC purity, for laboratory use only.Read reference
Growth-Factor Peptides
CompoundTesamorelinTesamorelin is supplied by PX1 Research as a lyophilized research-grade stabilized GHRH analog at ≥99% HPLC purity, for laboratory use only.Read reference CompoundIpamorelinIpamorelin is supplied by PX1 Research as a lyophilized research-grade selective ghrelin receptor (GHS-R) agonist at ≥99% HPLC purity, for laboratory use only.Read reference CompoundCJC-1295CJC-1295 is supplied by PX1 Research as a lyophilized research-grade GHRH analog (with or without DAC) at ≥99% HPLC purity, for laboratory use only.Read reference CompoundSermorelinSermorelin is supplied by PX1 Research as a lyophilized research-grade GHRH (1-29) fragment at ≥99% HPLC purity, for laboratory use only.Read reference CompoundGHRP-2GHRP-2 is supplied by PX1 Research as a lyophilized research-grade growth hormone releasing hexapeptide at ≥99% HPLC purity, for laboratory use only.Read reference CompoundGHRP-6GHRP-6 is supplied by PX1 Research as a lyophilized research-grade growth hormone releasing hexapeptide at ≥99% HPLC purity, for laboratory use only.Read reference CompoundHexarelinHexarelin is supplied by PX1 Research as a lyophilized research-grade synthetic hexapeptide GH secretagogue at ≥99% HPLC purity, for laboratory use only.Read reference CompoundIGF-1 LR3IGF-1 LR3 is supplied by PX1 Research as a lyophilized research-grade long R3 insulin-like growth factor-1 analog at ≥99% HPLC purity, for laboratory use only.Read reference CompoundMK-677 (Ibutamoren)MK-677 (Ibutamoren) is supplied by PX1 Research as a lyophilized research-grade orally active non-peptide ghrelin mimetic at ≥99% HPLC purity, for laboratory use only.Read reference
Blends
CompoundGLOW Blend (BPC-157 + TB-500 + GHK-Cu)GLOW Blend (BPC-157 + TB-500 + GHK-Cu) is supplied by PX1 Research as a lyophilized research-grade tri-peptide research blend at ≥99% HPLC purity, for laboratory use only.Read reference CompoundKLOW Blend (BPC-157 + TB-500 + GHK-Cu + KPV)KLOW Blend (BPC-157 + TB-500 + GHK-Cu + KPV) is supplied by PX1 Research as a lyophilized research-grade four-peptide research blend at ≥99% HPLC purity, for laboratory use only.Read reference CompoundWolverine Stack (BPC-157 + TB-500)Wolverine Stack (BPC-157 + TB-500) is supplied by PX1 Research as a lyophilized research-grade two-peptide repair blend at ≥99% HPLC purity, for laboratory use only.Read reference