Total antioxidant capacity (TAC) and total polyphenol content (TPC) of 52 fruits sold in Spain were evaluated by FRAP, ABTS, DPPH and Folin-Ciocalteu. For berries, TAC was 9, 17 and 31 times greater than for oranges, bananas and apples, respectively. Consumption of unpeeled fruit increases TAC and TPC by 2.4 times. Oranges contribute most to TAC and TPC (33% and 32% respectively) in the Spanish diet. Oranges, strawberries, tangerines, grapes and bananas account for 76% of the TAC of fruits consumed in Spain. The consumption of fruit in Spain has remained stable for the last eight years, but falls below WHO recommendations for daily intake. Greater consumption of fruits is recommended, to increase TAC and TPC and to reduce the risk of developing chronic disease.Capacidad antioxidante y contenido de polifenoles de 52 frutas vendidas en España y su contribución a la ingesta dietética RESUMEN La capacidad antioxidante total (CAT) y el contenido total de polifenoles (PT) de 52 frutas adquiridas en España se evaluaron por FRAP, ABTS, DPPH y Folin-Ciocalteu. Las bayas poseían una CAT de 9, 17 y 31 veces mayor que las naranjas, plátanos y manzanas, respectivamente. El consumo de fruta sin pelar aumenta la CAT y PT en 2,4 veces. Las naranjas son las que más contribuyen a CAT y PT (33% y 32% respectivamente) en la dieta española, si añadimos fresas, mandarinas, uvas y plátanos esta sube al 76%. El consumo de fruta en España se ha mantenido estable durante los últimos ocho años, pero está por debajo de las recomendaciones de la OMS para la ingesta diaria. Se recomienda un mayor consumo de frutas, para aumentar CAT y PT y así reducir el riesgo de desarrollar enfermedades crónicas.
Banana passion fruit (Passiflora tripartite L.H. Bailey) is a lesser known species of the genus Passiflora. This fruit typically grows in the Andean region of Ecuador and it is locally known as tumbo, taxo or curuba. The juice of this fruit is highly appreciated in South America. Extracts of banana passion fruit were characterized for their content levels of free and bound phenolic compounds by high performance liquid chromatography coupled to high resolution mass spectrometry detector (HPLC-ESI-TOF-MS). A total of 82 polar compounds classified as phenolic acid derivatives, organic acids, benzophenones, flavan-3-ols, flavonols and flavones were detected in the extracts. The total phenolic content was 2356 mg 100 g−1 dry matter, with the bound phenolic fraction representing 37.7% of total amounts. Flavan-3-ols, such as (epi)catechin, (epi)azfelechin and their derivatives, were the main phenolic compounds in the free phenolic fraction; however, phenolic acids represented the most abundant class of bound phenolic extracts. The antioxidant and hypoglycemic capacities reported for banana passion fruit were higher than for other fruits. To our knowledge, this is the first time that bound phenolic compounds have been described in banana passion fruit pulp.
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