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BACKGROUND: This study evaluates the radical-scavenging activity of five plants used as food and medicines in the northeastern region of Brazil. MATERIALS AND METHODS: Spectrophotometric analysis of the plants' ethanol extracts was carried out. The antioxidant activity was determined by the DPPH (2,2-diphenyl-1 picrylhydrazyl) test. The antioxidant capacity was measured using ascorbic acid as a positive control. RESULTS: All tested plant extracts showed an antioxidant activity, but the highest activity was observed with the extracts of Momordica charantia and Eugenia jambolana. CONCLUSIONS: Therefore, these species must be studied as a putative source of products for use in the prevention and treatment of diseases in which oxidants or free radicals are implicated.
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Coutinho et al. (2010) studied this question.
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