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This study investigated the antioxidative effect of rooibos herbal tea and a rooibos-derived commercial supplement on  tert -butyl hydroperoxide- ( t -BHP-) induced oxidative stress in the liver. Forty male Wistar rats consumed fermented rooibos, unfermented rooibos, a rooibos-derived commercial supplement, or water for 10 weeks, while oxidative stress was induced during the last 2 weeks via intraperitoneal injection of 30 µmole of  t -BHP per 100 g body weight. None of the beverages impaired the body weight gain of the respective animals. Rats consuming the rooibos-derived commercial supplement had the highest ( P  < 0.05) daily total polyphenol intake (169 mg/day) followed by rats consuming the unfermented rooibos (93.4 mg/day) and fermented rooibos (73.1 mg/day). Intake of both the derived supplement and unfermented rooibos restored the  t -BHP-induced reduction and increased ( P  < 0.05) the antioxidant capacity status of the liver, while not impacting on lipid peroxidation. The rooibos herbal tea did not affect the hepatic antioxidant enzymes, except fermented rooibos that caused a decrease ( P  < 0.05) in superoxide dismutase activity. This study confirms rooibos herbal tea as good dietary antioxidant sources and, in conjunction with its many other components, offers a significantly enhanced antioxidant status of the liver in an induced oxidative stress situation.

oxidative medicine and cellular longevity

Effects of Consumption of Rooibos (<i>Aspalathus linearis</i>) and a Rooibos-Derived Commercial Supplement on Hepatic Tissue Injury by<i>tert</i>-Butyl Hydroperoxide in Wistar Rats

Effects of Consumption of Rooibos (Aspalathus linearis) and a Rooibos-Derived Commercial Supplement on Hepatic Tissue Injury bytert-Butyl Hydroperoxide in Wistar Rats