Over the past few decades, averagetestosterone levels have been declining at an alarming rate, even when adjustedfor age. Deficiency impacts not only fertility and muscle mass, as is generallyrecognised, but all aspects of physical, mental and emotional health. Furthermore,it can affect the epigenetics of a man’s future children – low testosteronetoday may set the stage for even greater hormonal and metabolic dysfunction inthe next generation. This book provides a structured overview and distillationof what the author had to learn through his own research, clinical practice,patient experience and personal journey because this was not part of hismedical training or education. His book goes beyond symptom lists and bloodtest results (both controversial) to provide a roadmap for the individual to understandtestosterone’s central role in their development, health and identity.