The study says: “It is well known that herbal teas such as hibiscus, rooibos, and yerba mate, are important sources of antioxidants, able to prevent some oxidation-related stresses.
“These plants produce several bioactive metabolites, have a pleasant taste, and a long-lasting history as safe foods.”
It concludes: “Rooibos, hibiscus, and yerba mate tisanes have been demonstrated to contribute positively to the reduction of oxidative stress, inhibition of glycoxidation, and promotion of neuronal oxidative protection, both in vitro (in a test tube) and in vivo (in a living organism).
“Investigating these plants has important market impacts.