Rooibos, also known as red bush tea, is a herbal tea made from the leaves of the Aspalathus linearis plant, which grows in the Western Cape province of South Africa. The tea is naturally caffeine-free and has a slightly sweet, fruity flavor. Rooibos is commonly used as a substitute for black tea by people who are caffeine-sensitive or looking to reduce their caffeine intake. It is also known to have several health benefits, including reducing inflammation, improving digestion, and promoting relaxation. Rooibos can be enjoyed hot or iced, and is often used in blends with other herbs and spices.