The water extracts however showed no effect throughout
the range of tested concentrations. This conspicuous lack
of anticancer activity of the water leaves extract despite
its having a high antioxidant activity and reducing power
compared to the ethanolic extract may elicit a number
of theories pertaining the mechanism of action of the
anticancer agents in this plant which may be different from
the commonly generalized idea that anticancer activity is
directly related to antioxidant activity. Our results are in
line with earlier preliminary studies which showed a good
relationship between antioxidant efficacy of plant extracts
and anticancer potency. All of the extracts which gave high
anticancer potency have high antioxidant activity while the
opposite trend is not