HCG: A Research Reference Guide to Human Chorionic Gonadotropin
By Lemon Labs Research Desk · Updated July 29, 2026
In short
HCG (human chorionic gonadotropin) is a glycoprotein hormone studied in endocrinology research for its ability to activate the luteinizing-hormone (LH) receptor — it mimics LH signaling in research models. It is supplied as a research-use-only reference compound.
What is HCG?
HCG is a glycoprotein hormone composed of an alpha and a beta subunit. Its research relevance comes from the beta subunit’s structural similarity to luteinizing hormone (LH): HCG binds and activates the LH/CG receptor, making it an LH-mimetic tool in endocrinology research.
Mechanism studied in research
In preclinical and in-vitro research, HCG is used to probe LH-receptor signaling in the gonadal axis. It connects to the same reproductive-endocrinology research area as kisspeptin, which acts further upstream on that axis.
Handling and quality
Supplied lyophilized; the glycoprotein is sensitive to heat, so store cold and sealed, protected from light, and reconstitute gently in the lab. Verify identity and quality on the lot Certificate of Analysis.
Research-use-only statement
This compound is supplied strictly for in-vitro research and laboratory use. It is not a drug, supplement, food, or cosmetic, has not been evaluated by the FDA, and is not intended to diagnose, treat, cure, or prevent any disease. It is not for human or veterinary use. All information here summarizes published scientific literature for educational purposes for qualified researchers — it is not medical advice and does not describe human administration.
Reference compounds mentioned
Frequently asked
Why is HCG studied as an LH mimic?
Its beta subunit is structurally similar to luteinizing hormone, so it binds and activates the LH/CG receptor — researchers use it to probe LH-receptor signaling.
How does HCG relate to kisspeptin?
Both sit in reproductive-endocrinology research: kisspeptin acts upstream on the HPG axis, while HCG acts at the LH receptor further downstream.
Is HCG for human use?
No. Material sold here is a research-use-only reference compound, not for human or veterinary use.