N. Sirag, Im Tajeldin, M. Abubakr, A. Mudathir, Isra Bashir, S. Mohammed
Background : Medicinal plants contain physiologically active ingredients that over the years have been exploited in traditional medicine for the treatment of various ailments. Objectives: This study was undertaken to investigate the antioxidant activity of seven varieties of onion ( Allium cepa ) grown in Sudan. Methods : The antioxidant capacity was conducted based on the ability of the plant extracts to scavenge DPPH radical. Results : The extracts exhibited a notable dose dependent inhibition of DPPH radical. Shendi (Red onion local strain) exhibited the highest antioxidant activity with EC50 25.25 µg/ml followed by Kassala (Red onion local strain) and white onion with less scavenging activity was produced by Green onion. Conclusion: It can be concluded that Allium cepa could be a potential source of antioxidant principles.
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