Plectranthus amboinicus (Indian borage) – Benefits, Uses & Phytochemical Constitution Introduction Plectranthus amboinicus (Lour.) Spreng. of the Lamiaceae family is a perennial herb encountered typically throughout the tropics of Asia, Australia and Africa. The herb is rich in natural phytochemical compounds that have high end nutritional and therapeutic properties. This makes the herb highly appreciated in the pharmaceutical industry. In addition, the herb has profuse essential oil content and aromatic properties that makes it a horticultural treasure. It is extensively