Rooibos (Asapathaus linearis) is a shrub which grows up to 2 meter in height. The erected red stems contain many dark green needle shaped leaves. Only the Rooibos leaves and twigs are used for medician purpose. It contains no caffeine. It is found that Rooibos has anti-carcinogenic and antimutagenic effects. Rooibos tea is used for its anti-inflammatory and anti-allergic properties. Consumption of Rooibos tea may relief fever, asthma, insomnia, colic in infants and skin disorders. Its extracts are used in ointments against eczema. According to studies conducted in South Africa and Japan Rooibos has been shown to aid in health problems such as insomnia, irritability, headaches, nervous tension, and hypertension. Rooibos is referred to as "the miracle tea" in South Africa and "long life tea" in Japan.
Rooibos is the only known source of the phytochemical aspalathin. It is also rich in Quercetin, which is well known for increasing capillary strength, aiding circulation, preventing hemorrhaging, and protecting against infections. Similarly it contains Luteolin, which is known for it's antispasmodic properties. Laboratories studies have indicated that quercetin and luteolin found in Rooibos help to prevent cardiovascular disease, some cancers and stroke. Rutin has been associated with the maintenance of blood vessels walls. Studies have also shown that Rooibos tea contains anti-spasmodic agents, which can relieve stomach cramping and colic in infants. It is also used to treat irritated skin. It is brewed and placed directly on infected areas. Rooibos contains anti-oxidants which can help slow the aging process and boost the immune system. Since Rooibos tea doesn’t contain oxalic acid, it is a good beverage for people prone to kidney stones. Rooibos contains minerals like copper, iron, potassium, calcium, fluoride, zinc, manganese, magnesium, etc. which are beneficial to the human health.