Pharmacognosy is a systematic science that studies the morphological, chemical, and biological aspects of crude pharmaceuticals of natural origin, as well as their history, cultivation, bio-assaying, collection, extraction, isolation, and quality control. It is also known as phytochemistry. The study of phytochemicals, often known as chemicals that are derived from plants, is known as phytochemistry. The objective of phytochemists is to characterize the structures of the vast majority of secondary metabolites that have been discovered in plants, as well as the activities of these chemicals in human and plant biology, as well as the production of these compounds. A Comprehensive Approach attempts to provide not only technical corrections, updates, and clarifications throughout the book, it also adds new topics such as serotaxonomical classification, markers, herbal excipients, skin whitening (bleaching) agents, novel herbal dosage forms, antioxidants in skin cosmetics, different chemical courses of cosmetic raw material, ethnobotany, edible vaccines, hallucinogenic plants, and teratogenic plants. In addition to covering contemporary pharmacognosy, this book is dedicated to teaching readers about alternative medical systems. It would also be helpful for those studying associated botanical and alternative healthcare sciences, as well as for researchers and industrialists engaged in the development of herbal technology.