Prof Ralf Henkel is a Senior Professor at the Department of Medical Biosciences, University of the Western Cape, South Africa. Prior to this, Prof Henkel worked as an investigator in several hospital institutes for more than 20 years in Germany, focusing on Reproductive Medicine including in-vitro fertilization. He is the Regional Coordinator in Africa of Asian Journal of Andrology, and on the Editorial Board of several leading Journals including Andrologia. His current research interests focuses on Andrological area such as impact of reactive species on sperm functions,fertilization and pregnancy, leading to over 300 journal papers under his name and author of several books. He keenly investigates natural remedies including Physta™ – the proprietary and standardized Tongkat Ali extract from Biotropics.