It's a naturally occurring copper-binding peptide first isolated from human plasma in 1973 by biochemist Loren Pickart, who noticed that older liver tissue regenerated better when exposed to plasma from younger donors
In my opinion, you should not take a peptide that is formulated purely for research use, Svensson says
GHRP-2 sits firmly in the peptide-GHS row: a ghrelin-receptor agonist, potent, historically pivotal, diagnostically useful, and therapeutically unproven in long-term trials
doi: 10.3389/fphys.2026.1779008 Received 31 December 2025 Revised 17 February 2026 Accepted 19 February 2026 Published 09 March 2026 Volume 17 - 2026 Edited by Mohd Yaseen Malik, University of Oxford, United Kingdom Reviewed by Jerzy Beltowski, Medical University of Lublin, Poland Gabriel Komla Adzika, University of Pennsylvania, United States Updates Copyright 2026 Pena, Del Ro and Flores
This means that they each boost the effectiveness, lifespan, and power of each other within the body
When you consume NAC in the form of food or supplements, your gut absorbs the NAC, transports it to your liver, and the liver converts it to cysteine