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Open AccessReview

Phytochemicals in Daucus carota and Their Health Benefits—Review Article

Department of Horticulture, Ghazi University, Dera Ghazi Khan 32200, Pakistan
Department of Plant Sciences, University of the Free State, Bloemfontein 9300, South Africa
Fiblast, LLC. 1602 Mizell Road, Tuskegee, AL 36083, USA
Veterinary Faculty, Instituto Agroalimentario de Aragón-IA2 (Universidad de Zaragoza—CITA), 50013 Zaragoza, Spain
Institute of Horticultural Sciences, University of Agriculture, Faisalabad 38000, Pakistan
Department of Agriculture & Agribusiness Management, University of Karachi, Karachi 74000, Pakistan
National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan
Department of Plant Sciences (Plant Breeding), University of the Free State, Bloemfontein 9300, South Africa
Author to whom correspondence should be addressed.
Foods 2019, 8(9), 424;
Received: 2 August 2019 / Revised: 7 September 2019 / Accepted: 16 September 2019 / Published: 19 September 2019
Carrots are a multi-nutritional food source. They are an important root vegetable, rich in natural bioactive compounds, which are recognised for their nutraceutical effects and health benefits. This review summarises the occurrence, biosynthesis, factors affecting concentration, and health benefits of phytochemicals found in Daucus carota. Two hundred and fifty-five articles including original research papers, books, and book chapters were analysed, of which one hundred and thirty articles (most relevant to the topic) were selected for writing the review article. The four types of phytochemicals found in carrots, namely phenolics, carotenoids, polyacetylenes, and ascorbic acid, were summarised. These chemicals aid in the risk reduction of cancer and cardiovascular diseases due to their antioxidant, anti-inflammatory, plasma lipid modification, and anti-tumour properties. Numerous factors influence the amount and type of phytochemicals present in carrots. Genotype (colour differences) plays an important role; high contents of α and β-carotene are present in orange carrots, lutein in yellow carrots, lycopene in red carrots, anthocyanins in the root of purple carrots, and phenolic compounds abound in black carrots. Carotenoids range between 3.2 mg/kg and 170 mg/kg, while vitamin C varies from 21 mg/kg to 775 mg/kg between cultivars. Growth temperatures of carrots influence the level of the sugars, carotenoids, and volatile compounds, so that growing in cool conditions results in a higher yield and quality of carrots, while higher temperatures would increase terpene synthesis, resulting in carrots with a bitter taste. It is worthwhile to investigate the cultivation of different genotypes under various environmental conditions to increase levels of phytochemicals and enhance the nutritional value of carrot, along with the valorisation of carrot by-products. View Full-Text
Keywords: carrot; phenolic compounds; carotenoids; polyacetylenes; ascorbic acid; human health carrot; phenolic compounds; carotenoids; polyacetylenes; ascorbic acid; human health
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Ahmad, T.; Cawood, M.; Iqbal, Q.; Ariño, A.; Batool, A.; Tariq, R.M.S.; Azam, M.; Akhtar, S. Phytochemicals in Daucus carota and Their Health Benefits—Review Article. Foods 2019, 8, 424.

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