Abstract:
The nutrient composition of Myrothamnus flabellifolius leaf tea extract (MLTE) and
its protective effect against oxidative hepatic cell injury were evaluated. Gallic acid,
caffeic acid, ferulic acid, methyl gallate, and epicatechin were identified in MLTE by
high‐performance liquid chromatography (HPLC). The tea extract showed an appreciable
nutritional content of proximate, sugar, vitamin E, monounsaturated fatty
acids, omega 6 and 9 unsaturated fatty acids, as well as considerable amounts of
various mineral elements. Nineteen amino acids were found. Moreover, MLTE exhibited
potent in vitro antioxidant activities, presumably because of its richness in polyphenols
(gallic acid and ferulic acid) and vitamin E. In Chang liver cells, pretreatment
with MLTE suppressed oxidative lipid peroxidation (IC50 = 113.11 μg/ml) and GSH
depletion (IC50 = 70.49 μg/ml) without causing cytotoxicity. These data support the
local consumption of M. flabellifolius herbal tea, which may be used against oxidative
stress‐induced diseases while providing the body with necessary nutrients.
Practical application
Herbal teas are one of the most consumed beverages in the world today, due to
their refreshing taste and additional health benefits. Myrothamnus flabellifolius
herbal tea is a widely used traditional herbal tea in Southern Africa with potentials
for commercialization due to its pleasant flavor. This study, for the first time, reported
the nutritional composition of the leaf decoction of M. flabellifolius and its
protective effect on hepatic oxidative insults. These results can inform the dietary
and nutritional use of the tea for optimum benefits, as well as provide preliminary
scientific validation of the use of the herbal tea as an antioxidant beverage with
good nutritional value.
