The study of botany that aims to use plants for medicinal purposes is known as herbalism. Some of the products of herbalism include herbal medicines, natural health products, herbal remedies, supplements, etc. Many herbs are applied to the skin in the form of essential oils. Herbalism is widely practiced throughout Africa and Asia. Traditional Chinese medicine and Ayurveda are examples of herbal medicine. This book presents researches and studies performed by experts across the globe. It covers in detail some existing theories and innovative concepts revolving around herbal medicine. For all those who are interested in this field, this book can prove to be an essential guide.