Enjoy the best brands in naturally decaffeinated South African rooibos tea from English Tea Store. Our rooibos loose teas, teabags and K-Cups are a pleasantly sweeter alternative to bold black teas. Low in tannins, rooibos tea from South Africa is often used to treat headaches, asthma and stomach ailments. It's naturally rich in antioxidants to help boost our immune systems.