D.E. Okwu  , I.N. Emenike  , 
    Evaluation of The Phytonutrients and Vitamins Content of Citrus Fruits,
    International Journal of Molecular Medicine and Advance Sciences,
    Volume 2,Issue 1,
    2006,
    Pages 1-6,
    ISSN 1813-176x,
    ijmmas.2006.1.6,
    (https://makhillpublications.co/view-article.php?doi=ijmmas.2006.1.6)
    Abstract: Phhytochemical studies of five varieties of citrus species; sweet orange (<I>Citrus sinensis)</I>, tangerine (<I>Citrus reticulata)</I>, lemon (<I>Citrus limonum</I>), lime (<I>Citrus aurantifolia)</I> and grape (<I>Citrus grandis)</I> revealed the presence of bioactive compounds comprising alkaloids (0.33-0.04 mg 100 g <SUP>1</SUP>), flavonoids (0.19-0.57 mg 100 g <SUP>1</SUP>), phenols  (0.01-0.42  mg 100 g <SUP>1</SUP>) and tannins (0.01-0.04 mg 100 g <SUP>1</SUP>). These citrus fruits are good sources of water-soluble  vitamins:  ascorbic  acids  (19.36-61.60  mg  100 g <SUP>1</SUP>), riboflavin (0.01-0.11 mg 100 g <SUP>1</SUP>), thiamin (0.06-0.12 mg 100 g <SUP>1</SUP>) and niacin (0.03-0.43 mg 100 g <SUP>1</SUP>). These phytonutrients and vitamins may be responsible for the antioxidants, anticancer, anti-inflammatory properties of the citrus species. The citrus spices have their popular use in herbal medicine and as fruits in Nigeria.
    Keywords: Phytonutrients;vitamins;citrus;antioxidants;anti-inflammatory;herbal medicine