Although sideritis extracts had a lower phenolic concentration and total antioxidant capacity than green tea extract, their cellular antioxidant effects were similar. The different phenolic pattern of the extracts suggests that the protective activity is not limited to catechins (2).
We have demonstrated that a bioactive-rich extract of the mountain tea plant (S. scardica) performs as well in improving cellular antioxidant status as a catechin-rich extract of C. sinensis (green tea), even though the phenolic content of the S. scardica extract was only about 18% of that of the C. sinensis extract and its TAC was 10-fold lower. Since extracts of C. sinensis have been demonstrated to induce a number of beneficial physiological effects in humans, many of whichmay be related to the capacity of the tea catechins to improve cellular antioxidant functions, we can conclude that consumption of S. scardica may have health benefits. Future research should focus on identifying the active components of S. scardica and their mechanisms of action, and evaluating the potential benefits of consuming S. scardica products on human health (2).