Book Web site: TestosteroneWisdom.com Nelson Vergel is the author of "Testosterone: A Man's Guide" and co-author of the book "Built to Survive", the founder of the Body Positive Wellness Clinic in Houston, and an expert speaker on exercise, nutrition, testosterone replacement, metabolism , sexual function, body changes, lean body mass gain and fat loss. Aided by his chemical engineering degree and obsession for scientific data, he adds his own personal experience as he demystifies all testosterone and health myths. He has been involved in several clinical studies of supplements, hormones and exercise through his association with the National Institute of Health and private investigators. Via over 500 lectures, he has provided patient-friendly information accessible to all, independently of their knowledge base.For the last 20 years, his trial-and-error experience to improve his quality of life has paved the way for others to learn from his knowledge.