Part 6/9:
The reemergence of testosterone following a fast can be linked to the interplay between proteins and growth factors like IGF-1. The intricate relationship between nutrition and hormone production—particularly testosterone—involves the hormone Gonadotropin-releasing hormone (GnRH), which plays a pivotal role in the testicular production of testosterone. Fasting has shown to heighten sensitivity to GnRH, leading to increased luteinizing hormone and, subsequently, testosterone.