The natural products have interesting and useful biological activities and perform different functions. Plant kingdom presented the richest source of remedies to diverse human ailments. In this book selected 27 medicinal plant for health needs. Realizing the importance of plants in the discovery of new and safer therapeutic agents, screening of herbs for pharmacological activities and phytochemical constituents is one of the active fields. Investigation of medicinal plants and chemical ingredients, the work of the pharma may be regarded as a precursor of the modern sciences of chemistry and pharmacology.