While the use of synthetic drugs has overshadowed use of natural products recently, natural compounds still boast greater diversity, lower cost, and fewer side-effects. Covering the multitude of curative effects of naturally occurring chemicals in natural products, this book provides a complete review of medicinally active metabolites from differing viewpoints. It describes the effects of natural extracts and/or their isolated compounds and gives a detailed account of their modes of action; techniques for extraction, processing and production and strategies for marketing and commercialization.