The phenolic content of the sample was determined using
Folin-Ciocalteu reagent and was 5.0 mg/g dry weight expressed
as gallic acid equivalents (GAE). Typical phenolics that possess
antioxidant activity have been characterized as phenolic acids
and flavonoids [15]. Phenolic acids have repeatedly been
implicated as natural antioxidants in fruits, vegetables, and
other plants. For example, caffeic acid, ferulic acid, and vanillic
acid are widely distributed in the plant kingdom [16].
From these results it can concluded that the crude extract
of G. changii are promising starting material for the isolation
of compound(s) with antioxidant activities. There is lack of
information available on the chemical composition of G. changii,
which exhibit antioxidant activity. Further phytochemical work
need to be done on these extracts including fractionation to
isolate active constituent and subsequent pharmacological