Quick research-only answers to the questions we get most about tirzepatide (GLP-2TZ), retatrutide (GLP-3RT), semaglutide (GLP-1SG), BPC-157, GHK-Cu, MOTS-c, and the rest of the ARG Peptides research catalog.
What is GLP-3RT?
GLP-3RT is a synthetic 39-amino-acid research peptide engineered as a triple agonist of the GLP-1, GIP, and glucagon receptors. It is the same compound discussed in the literature as retatrutide. Read the full GLP-3RT research guide.
What is GLP-2TZ?
GLP-2TZ is a synthetic 39-amino-acid research peptide acting as a dual agonist of the GLP-1 and GIP receptors. It is the same compound referenced in scientific literature as tirzepatide. Read the full GLP-2TZ research guide.
What is GLP-1SG?
GLP-1SG is a long-acting GLP-1 receptor agonist research peptide, commonly known as semaglutide. It engages only the GLP-1 receptor, making it the single-agonist reference compound in the incretin research family.
What is the difference between tirzepatide and retatrutide?
Tirzepatide (GLP-2TZ) is a dual agonist (GLP-1 + GIP). Retatrutide (GLP-3RT) is a triple agonist (GLP-1 + GIP + glucagon). The difference is the addition of the glucagon receptor in the triple-agonist molecule. See our Tirzepatide vs Retatrutide research comparison for details.
What is BPC-157?
BPC-157 is a synthetic pentadecapeptide (15 amino acids) supplied as a lyophilized research reference compound. CAS 137525-51-0. Read more in the BPC-157 research overview.
What is GHK-Cu?
GHK-Cu is a copper-binding tripeptide complex (glycyl-L-histidyl-L-lysine coordinated with copper II), studied in extracellular matrix and copper coordination research. Read the GHK-Cu research guide.
What purity are ARG Peptides products?
All ARG Peptides products are 99%+ purity, US-synthesized, and supplied in lyophilized form.
How do you ship?
Free shipping on every order via UPS Ground or UPS 3 Day Select. Orders placed before 2 PM CT ship the same business day. Weekends excluded.
Are these peptides for human use?
No. ARG Peptides products are research chemicals sold strictly for in vitro and laboratory research use only. They are not drugs, supplements, or food, and are not intended for human or animal consumption.
FOR LABORATORY RESEARCH USE ONLY: Sale is restricted to qualified researchers. No therapeutic or medical claims are made or implied.