Irish Times has a nice article about rooibos tea, which you can read in its entirety here: Does it work? Can rooibos tea cut risk of heart disease? They’re actually coming from a pretty scientific standpoint, citing studies and adverse effects and whatnot. Good for them.
Here’s an excerpt:
The rooibos, or Aspalathus linearis, grows only in the Western Cape region of South Africa. This region contains several unique plant species that will not grow elsewhere because of the area’s distinct climate and soil. Both green and red varieties of the tea are available.
Rooibos tea contains no caffeine and is very low in tannins (the ingredients that give black tea its bitter taste). The plant has been used medicinally in the region for centuries, and has been linked to various health claims in recent decades. Interest has developed because of claims that rooibos tea is very high in antioxidants. Lower antioxidant levels have been associated with heart disease, leading to claims that rooibos tea helps reduce the risk of heart disease.