Rooibos is a powerful antioxidant and anti-inflammatory. Its high levels of Vitamins C and E combined with 15 flavonoids, make it an excellent antioxidant. Rooibos tea is naturally caffeine free and is also a good source of minerals, vitamins, antioxidants and other beneficial nutrients that may help protect against some diseases. Rooibos tea is grown in the Cedarburg Mountains in South Africa near the town of Clan William, where the soil is rich in nutrients.