Kisspeptin for Fertility Support in Men on TRT
The speaker mentions Kisspeptin as a peptide that indirectly increases Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH). It is suggested for men on Testosterone Replacement Therapy (TRT) who wish to maintain spermatogenesis, as exogenous testosterone shuts down LH/FSH signals. The speaker notes that while HCG has more evidence behind it, Kisspeptin is an option to consider.
General Principle: Receptor Downregulation as the Mechanistic Basis for Cycling Requirements
The speaker articulates a general pharmacological principle: any compound that works by repeatedly binding and activating a specific receptor will eventually trigger receptor downregulation, where the body removes receptors from the cell surface to protect itself. This loss of receptor availability reduces the compound's effectiveness and is the core reason cycling is required for such agents. This principle is applied to distinguish BPC-157 from other peptides.
Kisspeptin Requires Cycling Due to GnRH Receptor Downregulation
Kisspeptin is mentioned as another peptide that mimics GnRH hormones and therefore causes receptor downregulation with continuous use, necessitating cycling. It is grouped with testosterone replacement therapy as an example of compounds that lose efficacy when the target receptor is chronically overstimulated. No dosage or protocol details are provided.