Lavandula angustifolia, commonly known as lavender, is a plant that has been recognized for its potential health benefits. It's used as an antiseptic, aromatic, expectorant, stomachic, antispasmodic, carminative, and preservative substance. The essential oil derived from lavender has been found to have significant antioxidant activity, which can neutralize harmful free radicals in the body. Moreover, it contains a variety of bioactive compounds that contribute to the plant's health-promoting properties. This guide covers the history, properties, preparation, dosage and usage of Lavandula angustifolia as a medicinal herb.