1. Introduction
Approximately 80% of the world populations depend exclusively
on plants for their health and healing. Whereas in the developed
world, reliance on surgery and pharmaceutical medicine is more
usual however in the recent years, more and more people are complementing
their treatment with natural supplements (Dursum
et al., 2004). Nowadays motivation of people towards herbs is
increasing due to the concern about the side effects of synthetic
chemical drugs. People want to concern their own health rather
than submitting themselves to impersonal health care system.
Many herbal and some common medicinal plants are good sources
of antioxidant compounds. Many of the biologically active substances
found in plants, including phenolic compounds (flavonoid,
phenolics) are known to possess potential antioxidant properties.
The antioxidant activity of medicinal plants depends on the concentration
of individual antioxidant entering into the composition
(Larson, 1988).