A REVIEW OF NATURAL PRODUCTS CHEMISTRY-THEIR DISTRIBUTION, EFFECTS AND USAGE TO MAN
Natural products are naturally occurring compounds that are end products of primary metabolites; often they are unique compounds for particular organisms. They are non-nutritive plant chemicals that have protective or disease preventive properties. They are nonessential nutrients, meaning that they are not required by the human body for sustaining life. The most important of these phytochemicals (secondary metabolites) are alkaloids, tannins, saponins, steroids, flavanoids, terpenoid and cardiac glycosides. Their important physiological effects on humans and other animals are reviewed.
Keywords: Natural products, uses, phytochemicals, man and chemistry.