Book excerpt: This book describes the analytical approach to testing over 160 important dietary supplement ingredients. In addition to the methods, there is significant guidance provided on how to develop, modify, and improve testing techniques. The procedures in this book include some of the most modern technologies that are available in the laboratory today. These basic principles of method development and troubleshooting can be implemented for food and food safety testing, drug development research, and agricultural areas. The contents of this book contain a very comprehensive collection of valuable analytical tools.