A treasure trove of uncommon and reliable scientific and clinical information for the toxicity and usefulness of today’s leading nonherbal dietary supplements. The supplements detailed were chosen for their popularity, toxicity, and the quantity and quality of information available. Each monograph discusses the history of the compound; its chemical structure; its current and promoted uses, sources, and chemical composition; and its toxicity, pharmacokinetics, and physiological role. Also presented are case reports of adverse effects and interactions, as well as information on reproductive effects, chemical and biofluid analysis, and regulatory status. Each chapter is based on original studies published in reputable peer-reviewed journals, as well as on meta-analyses, systematic reviews, or other high-quality assessments by recognized experts.