What Is the Difference Between HGH and IGF-1 LR3?
Published 2026-07-13 · REVIVE Peptides Research Desk · 2 min read
Short answer: HGH and IGF-1 LR3 sit in the same biological signaling pathway but are not the same thing: HGH (Human Growth Hormone) is a pituitary hormone that triggers the liver to produce IGF-1, while IGF-1 LR3 is a modified, longer-acting synthetic analog of that downstream IGF-1 signal itself, engineered for extended activity in laboratory research.
In normal physiology, growth hormone released from the pituitary acts on the liver to stimulate production of IGF-1 (insulin-like growth factor 1), which then mediates much of growth hormone's downstream effect on tissue growth and metabolism. HGH sits upstream in this axis; IGF-1 sits downstream.
IGF-1 LR3 is not simply "IGF-1 sold under a different name" — it is a specifically modified version, with a 13-amino-acid extension and an arginine substitution that reduce its binding to IGF-binding proteins, extending its functional activity window well beyond native IGF-1 for research purposes. HGH, by contrast, is the unmodified pituitary hormone itself (or its identical pharmaceutical recombinant form, somatropin).
Both sit outside REVIVE LAB UAE's catalog. HGH is a regulated prescription pharmaceutical in the UAE; IGF-1 LR3 is an unregulated research chemical, but neither is sold, listed, or available to order on this site. This page is published as general research information only and makes no health or therapeutic claim.
Not sold by REVIVE LAB UAE. This page is published for research-education purposes only. Neither HGH nor IGF-1 LR3 is part of the REVIVE LAB UAE product catalog and no order for either can be placed on this site.
Research-Use Only Disclaimer: This page is published for laboratory and scientific research information purposes only. Nothing here constitutes medical advice, dosing guidance, or a therapeutic recommendation. Products supplied by REVIVE LAB UAE (revivelab.ae) — where applicable — are sold strictly as reference materials for research use, not for human or veterinary consumption. Buyers and readers are solely responsible for compliance with applicable UAE laws and institutional research ethics requirements.