Nutraceuticals i.e. the product positioned at the interface between food and drugs, are an increasing group of products gaining importance; patients/consumers of drug always have a wish to have no or less side/ toxic effect and also complementary or alternative benefit of the drug products and that’s why nowadays they are using nutraceuticals. In recent years, because of health benefits and an alternative to modern medicine, there is a growing interest in nutraceuticals. Nutrients, functional foods, medicinal food, herbals and dietary supplements are major constituents of nutraceuticals these play an artistic instrumental role in health maintenance, they also show various acts against various disease conditions and thus promote and sustain the quality of life. The article aims to explore and discuss the ability of nutraceuticals to treat or prevent underlying causes of disease; the article outlines nutraceuticals with their therapeutic applications, adverse effects and interaction. Various researches on nutraceutical product are under process which will be integrating and assessing information further.