If a Klow listing does not tell you exactly what is inside, GHK-Cu is the more researchable option by default
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Disclosures: Behnam Saberi: Nothing to Disclose, Marwan Alsaqa: Nothing to Disclose, Leandro Sierra: Nothing to Disclose, Ximena Parraga: Nothing to Disclose, Merve Gurakar: Nothing to Disclose, Butros Fakhoury: Nothing to Disclose, Nazli Begum Ozturk: Nothing to Disclose, Alan Bonder: GSK: Grant/Research Support, Mirium: Grant/Research Support, Gilead: Grant/Research Support, Ipsen: Grant/Research Support, Cymabay: Grant/Research Support, Intercept: Grant/Research Support, Intercept: Consultant, GSK: Consultant, Ipsen: Consultant, Chemobab: Grant/Research Support, Alnylam: Consultant, Thirammune: Consultant, Ahmet Gurakar: DURECT: Grant/Research Support, Orphalan: Advisor 1336 RELAPSE OF ALCOHOL USE IN LIVER TRANSPLANT RECIPIENTS BEFORE AND DURING THE COVID-19 PANDEMIC Abla Alj 1 Isaac Ruiz 2 Hlne Castel 1 Alexandre Bourgeois 3 Genevive Huard 1 Julien Bissonnette 1 Catherine Vincent 1 Marc Bilodeau 1 Julian Hercun 4 , 1 CHUM, 2 Centre Hospitalier de l'Universite de Montreal, 3 CRCHUM, 4 National Institutes of Health Background: During the COVID-19 lockdown, alcohol consumption patterns changed

Even when absorbed, its hydrophobic nature often leads to efflux back into the intestinal lumen via the P-glycoprotein transporter, which is highly expressed in the intestine (Metzler et al., 2013)