This is a comprehensive, detailed clinical textbook on the andropause or male menopause concept and androgen deficiency in the aging male. Internationally respected author Dr. Malcolm Carruthers explains the causes of androgen deficiency in men, its differential diagnosis, and how to treat it with testosterone replacement therapy. It offers a large amount of new research data along with expert practical clinical advice and observations from 20 years of work on testosterone research and the author's unique clinical experience from seeing thousands of androgen-deficient patients in the UK, the USA and Australia.The book opens with an introductory chapter on androgen deficiency in the aging male and the andropause concept. The next chapter documents the history of testosterone treatment from antiquity to the awarding of the Nobel Prize to Adolf Butenandt and Leopold Ruzicka for synthesizing testosterone from cholesterol and patenting its production some 4,000 years later. Following chapters discuss the causes of androgen deficiency, the male menopause or andropause, and its differential diagnosis. Additional clinical chapters cover vasectomy, testosterone replacement therapy, erectile dysfunction, preventive medicine, and the harmful effects of environmental factors such as meat growth hormones on endocrine function in succeeding generations. In addition to a thorough subject index, the work includes reviews of the literature in each section and a fund of bibliographic references gleaned from the author's many years of research in this field.Androgen Deficiency and the Aging Male is a technically thorough clinical guide, a complete and detailed reference volume, and, in the words of Dr. Carruthers, "that rare thing, a cohesive and readable textbook."