Potentials of Two Nigerian Spices—<i>Piper nigrum</i> and <i>Monodora myristica</i> as Sources for Cheap Natural Antioxidants — Oak Academic Publishing
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Potentials of Two Nigerian Spices—<i>Piper nigrum</i> and <i>Monodora myristica</i> as Sources for Cheap Natural Antioxidants
Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria.
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Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria.
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Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria.
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Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria.
1 Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria.
2 Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria.
3 Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria.
4 Department of Genetics and Biotechnology, University of Calabar, Calabar, Nigeria.
Two commonly consumed spices in Nigeria — Piper nigrum (leaf and seed) and Monodora myristica (seed) were eva luated for natural antioxidant potentials in complementary in vitro assay systems. Extracts of the tested plant parts con tained low amounts of antioxidant compounds: 4.00 - 6.65 μg GAE/mg and 2.50 - 10.38 μg RE/mg for phenols and flavonoids respectively. The extracts scavenged DPPH and hydroxyl radicals in the range of 4.32 % - 37.37% (inferior to ascorbic acid and gallic acid used as standards) and 6.43 % - 17.10% respectively. In the reducing power and phos phomolybdenum assays, the extracts showed ability to reduce Fe (III) and Mo (VI) ions to their lower valence states of Fe (II) and Mo (V) respectively, although these activities were inferior to those of the standards used. Comparatively, Monodora myristica seed extract was superior to Piper nigrum leaf and seed extracts in antioxidant potential, but all the extracts generally showed dose-dependent antioxidant activities. Evidently, the studied spice plants are not without some natural antioxidant capacity and would contribute appreciably in combating free radical damages when consumed.
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