The HPTA is the hormonal feedback system that regulates endogenous testosterone production. The hypothalamus releases GnRH, stimulating the pituitary to secrete LH and FSH, which signal the testes to produce testosterone. Exogenous testosterone (TRT or AAS) suppresses this axis via negative feedback, shutting down LH, FSH, and natural testosterone production.
GearCheck connects glossary concepts to your actual bloodwork — showing exactly where your values sit and what they mean in the context of your protocol.
Analyze My Bloodwork →GearCheck provides blood marker analysis and harm reduction education. Information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional.