Phytochemicals, God's boons of healing power in plants describes the scientific base of application of plants as eternal source of food and drugs to mankind. These are the nonnutritive constituents of plant-based diet with disease-preventing or curative capabilities to humans. In other word they were produced mainly for chemical defense against attack by animals and insects, microorganisms (fungi and bacteria) and defense against other plants competing for nutrients and light but can also serve as a form of chemical store for the plant. Medicinal plants are an excellent source of these biologically active compounds such as; phenolic acids, polyphenols, flavonoids, alkaloids, and tannins which show different biological activities such as antioxidant, antimicrobial, cytotoxicity, and antitumor activities .