Accordingly to our knowledge this is the only book on the market written by experts who practically combine theoretical knowledge (academic education) as professionals in Biochemistry and Health Sciences with practical achievements in strength and bodybuilding sports. This book provides a reader with scientifically proven data and information and authors restrained themselves from using of internet wisdom.The authors do not provide you with phony miraculous steroid cycles that, in reality, work only on a few chosen ones. The book is a solid compendium on anabolic androgenic steroids that currently are used by majority bodybuilders. It also tackles the problem of health risk of steroid use/abuse. In special chapters application of insulin and Human Growth Hormone is also discussed.Short note about the authors:IGOR Z. ZUBRZYCKI was born in Wroclaw (Breslau). In 1989, he was awarded a MSc degree in Biology, at the University of Wroclaw, Poland. In 1993, he completed MSc Eng. in Biotechnology at Technical University of Wroclaw, Poland. In 1993, he also completed a PhD in Biochemistry at the University of Cape Town, South Africa. In 2001, he was awarded a DSc by the Nicolaus Copernicus University. He completed postdoctoral studies in Louisiana State University, Pittsburgh University Medical School, Philipps- Universit�t Marburg, European Molecular Biology Laboratory - Heidelberg, Universit�t Rostock. He has held the position of a Senior Lecturer in Biochemistry at Rhodes University, South Africa, Professor of Hanyang University, South Korea, and Namibia University of Science and Technology. He is licensed IFBB instructor.MAGDALENA WIĄCEK was born in Klodzko, Poland. In 2001, she was awarded a MSc degree in physiotherapy. In 2008, she completed a PhD in medical biology at Collegium Medicum Nicolaus Copernicus University. In 2014, she obtained a DPH at Poznan University of Medical Sciences. She was a postdoctoral researcher in Prof. Volker Zschorlich laboratory, Universit�t Rostock and in Prof. Joohong Ahnn Hanyang University. She was a lecturer and a professor at Universit�t Rostock and Hanyang University. She is licensed IFBB instructor. Current Polish and Namibian Fitness and Bodybuilding Champion and bronze medalist Mrs. Olimpia cometition, Naples 2017.