The antioxidant potential of some herbal plant extracts (commercial products) was measured using variousin vitroassays. Among the extracts fromCurcuma longa, Caffea arabica, Tribulus terrestris, Bacopa monnieriandTrigonella foenum- graecum, theCurcuma longaand coffee bean extract (Caffea Arabica) showed greater antioxidant activity measured as scavenging of DPPH, superoxide radicals, reducing power and inhibition of microsomal lipid peroxidation.
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