Research Peptides

Retatrutide

Retatrutide is a triple receptor agonist acting at the GIP, GLP-1 and glucagon receptors. Every PX1 Research lot is synthesized in a US cGMP-compliant facility, assayed by HPLC and LC-MS, and published with a lot-matched certificate of analysis.

Tirzepatide

Tirzepatide is a dual incretin agonist targeting both the GIP and GLP-1 receptors. PX1 Research manufactures tirzepatide domestically under cGMP-compliant controls with full analytical release testing.

BPC-157

BPC-157 is a synthetic pentadecapeptide sequence derived from a protein found in gastric juice. It is one of the most widely studied research peptides in tissue repair and angiogenesis literature.

GHK-Cu

GHK-Cu is a naturally occurring copper-binding tripeptide (glycyl-L-histidyl-L-lysine) studied extensively for extracellular matrix remodelling, collagen synthesis and antioxidant signalling.

Wolverine Stack

The Wolverine stack is a pre-mixed 10mg research vial containing 5mg BPC-157 and 5mg TB-500 (Thymosin Beta-4 fragment). It is the most requested recovery blend in the tissue-repair literature.

GLOW Protocol

GLOW is a cosmetic-science research blend built around GHK-Cu, paired with repair peptides for microvascular support. It is the most searched stack in skin-remodelling and longevity research.

Sublingual Peptide Strips

Sublingual strips dissolve under the tongue against a highly vascularised mucosal bed, removing the need for reconstitution or a syringe. PX1 strips use a bio-adhesive polymer matrix with precise per-strip loading.

Peptide Nasal Sprays

Metered intranasal delivery is the standard research route for neuropeptides and melanocortins because it exploits olfactory and trigeminal nerve transport pathways into the CNS.

Thymosin Alpha-1

Thymosin Alpha-1 is a 28-amino-acid thymic peptide central to immune research. It is studied for its role in T-cell maturation, dendritic cell signalling and toll-like receptor modulation.

Bacteriostatic Water

Bacteriostatic water is sterile water preserved with 0.9% benzyl alcohol, which inhibits bacterial growth and allows a vial to be entered multiple times. It is the standard solvent for reconstituting lyophilized research peptides.

Semaglutide

Semaglutide is a long-acting GLP-1 receptor agonist with a fatty-acid side chain that binds albumin and extends circulating half life to roughly one week. It is the reference compound most incretin research is benchmarked against.

Glutathione

Glutathione is the tripeptide Glu-Cys-Gly and the dominant intracellular antioxidant. Its free thiol group drives redox cycling between reduced (GSH) and oxidized (GSSG) states, the standard readout of cellular oxidative status.

Melanotan II

Melanotan II is a cyclic lactam analog of alpha-MSH that binds multiple melanocortin receptors, including MC1R. It is the reference compound in melanogenesis and melanocortin receptor selectivity research.

5-Amino-1MQ

5-Amino-1MQ is a small-molecule inhibitor of nicotinamide N-methyltransferase (NNMT). Blocking NNMT preserves the intracellular nicotinamide pool feeding NAD+ salvage, which is why it appears throughout adipocyte metabolism research.

AOD-9604

AOD-9604 is a 16-residue analog of the C-terminal 176-191 region of human growth hormone, with an added N-terminal tyrosine and a disulfide bridge that reproduces the loop geometry of the parent fragment. It isolates the lipid-metabolism-associated region of the hormone from its receptor-binding regions, which is why it is used as the fragment arm against full-length hGH in comparative metabolic research.

Tesamorelin

Tesamorelin is a stabilized growth hormone releasing hormone (GHRH) analog. A trans-3-hexenoyl group on the N-terminus resists DPP-4 cleavage, giving it far greater stability than native GHRH in visceral adipose research.

CJC-1295 + Ipamorelin

CJC-1295 is a GHRH analog and ipamorelin is a selective ghrelin receptor (GHS-R) agonist. Blended, they hit two independent receptors in the same signaling cascade, which is why the pairing is the most-studied secretagogue combination.

Ipamorelin

Ipamorelin is a pentapeptide growth hormone secretagogue receptor (GHS-R) agonist. It is described as the most selective GHRP because published receptor work shows minimal cortisol, prolactin and ACTH cross-activation.

IGF-1 LR3

IGF-1 LR3 (Long R3 IGF-1) is an 83-residue recombinant analog of insulin-like growth factor-1 carrying a 13-residue N-terminal extension and an arginine substitution at position 3. That substitution sharply reduces affinity for IGF binding proteins, leaving a much larger free fraction available to the IGF-1 receptor in serum-containing culture — the reason the analog, not native IGF-1, became the standard reference tool in cell-culture receptor work.

TB-500

TB-500 is the synthetic active fragment of thymosin beta-4, a 43-amino-acid actin-sequestering protein. The fragment retains the actin-binding domain central to cell migration and angiogenesis research.

KLOW

KLOW is a four-compound research blend that combines BPC-157, TB-500 (Thymosin Beta-4 fragment), GHK-Cu (copper tripeptide-1) and KPV in a single 80mg vial. It is engineered so the four most-studied repair, actin-regulating, extracellular-matrix and anti-inflammatory peptides share one reconstitution rather than four separate vials.

MOTS-c

MOTS-c is a 16-amino-acid mitochondrial-derived peptide encoded in the mitochondrial 12S rRNA gene. It translocates to the nucleus under metabolic stress and is a primary subject in AMPK and insulin-sensitivity research.

Epitalon

Epitalon (epithalon) is a synthetic tetrapeptide — Ala-Glu-Asp-Gly — derived from the pineal bioregulator epithalamin. It is the reference compound in telomerase-activation and circadian bioregulator research.

SS-31 (Elamipretide)

SS-31, also called elamipretide, is a cell-permeable tetrapeptide that concentrates in the inner mitochondrial membrane and binds cardiolipin, stabilizing cristae architecture and electron transport efficiency.

NAD+

NAD+ (nicotinamide adenine dinucleotide) is the central redox cofactor of cellular metabolism and the required substrate for sirtuin and PARP enzyme activity. Tissue NAD+ decline with age is the basis of most longevity metabolism research.

Semax

Semax is a synthetic heptapeptide derived from ACTH(4-10) with a Pro-Gly-Pro tail that blocks rapid enzymatic degradation. It is studied for BDNF expression and dopaminergic modulation, most often in intranasal preparations.

Selank

Selank is a synthetic analog of the immunopeptide tuftsin, extended with a Pro-Gly-Pro sequence for stability. Published work focuses on GABAergic tone, serotonin turnover and enkephalin degradation.

PT-141 (Bremelanotide)

PT-141, or bremelanotide, is a cyclic heptapeptide metabolite of melanotan II that acts on central melanocortin receptors — principally MC4R — rather than peripheral vascular tissue.

DSIP

DSIP (delta sleep-inducing peptide) is a nine-amino-acid neuropeptide first isolated from rabbit cerebral venous blood during induced slow-wave sleep. It is the canonical tool compound in delta-wave and circadian research.

Oxytocin

Oxytocin is a nine-amino-acid cyclic neuropeptide produced in the hypothalamus, with a disulfide bridge between residues 1 and 6. It is the primary tool compound in social bonding and neuroendocrine signaling research.