“…104 They are classified into several broad categories or classes, which include flavonoids, carotenoids, phenols or polyphenols, glycosides, tannins, saponins, lipids, fatty acids, alkaloids, and terpenoids; based on their basic structural features, biosynthetic pathways, or biological functions. 105 A summary of the major classes of phytochemicals and their percentage composition in plant extracts is given in Fig. 7.…”