Founder and chief medical consultant to the Centre for Men’s Health, Professor Malcolm Carruthers is a highly respected men’s health specialist and world authority on testosterone deficiency. Dr Carruthers is adjunct professor at the Alzheimer’s and Aging Department, Edith Cowan University, Western Australia. As well as being a fellow of the Royal College of Pathologists, he is a life member of the Royal College of General Practitioners (RCGP). He is also president of the Society for the Study of Androgen Deficiency (Andropause Society), a member of the British Cardiovascular Society, the European Academy of Andrology, the International and European Societies for the Study of the Aging Male, and a past president of the Society for Psychosomatic Research. Alongside over 120 refereed papers in medical journals and editorials in the American Heart Journal and The Lancet, he is the author of eight other books including The Testosterone Revolution (published by Thorson’s/HarperCollins in 2001) and ADAM: Androgen Deficiency in the Adult Male—Causes, Diagnosis, and Treatment, published by Taylor & Francis in 2004.