keywords: Urena lobata, mineral, amino acids, proximate, anti-nutritional
The aim of this study is to evaluate the nutritional qualities of Urena lobata leaves consumed in Katsina State, Nigeria. The sample was analyzed using the methods recommended by the Association of Analytical Chemists. The proximate compositions of the sample analyzed were ash content (9.12 ± 0.40), moisture content (7.39 ± 0.06), carbohydrate (47.64 ± 0.57), crude fibre (6.33 ± 0.03), crude protein (19.28 ± 0.41) and fat (10.33 ± 0.09) %. The leaf has a calorific value (360.65 Kj/100g). The sample was found to have reasonable amount of mineral content particularly potassium (1650.01 ± 1.53), calcium (34.19 ± 0.46), phosphorus (905 ± 1.97) and magnesium (66.11 ± 0.19) mg/100g. The anti-nutrients such as oxalates, alkaloids, tannins, flavonoids, saponins and cyanogenic glycosides were analyzed, though the values obtained from this constituent are within the WHO limit and they are safe for human consumption. Amino acids like histidine, leucine, aspartic acid, serine, valine, alanine, and tryptophan were all accounted for. Essential amino acid Aspartic acid with a concentration of 8.25 g/100g protein was found to be the highest while non-essential amino acid tryptophan with a concentration of 1.01 g/100g protein was found to be the least.
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