Abstract
In recent years the consumption of tropical fruits has increased, mainly due to their health benefits. This study aimed to identify and quantify the content of rutin using high performance liquid chromatography (HPLC) and other bioactive compounds in the pulp and in the by-products of tropical fruits from Brazil (acerola, guava, mango and caja-umbu). The levels of total polyphenols (Folin-Ciocaulteau), yellow flavonoids, anthocyanins and total antioxidant activity (ABTS method) were also analyzed. The results shows the large amount of bioactive compounds found in by-products, that have beneficial properties for health, and which are mostly wasted. The presence of rutin was observed in all pulps and by-products, but it was highest in the by-product of caja-umbu and acerola pulp. This study provides new information about the content of rutin in the pulp and by-products of tropical fruits, which is essential for future applications in the food industry. Moreover, it contributes to the recovery of by-products from the agro-industrial process.
Highlights
Concerning the use of healthy diets and well-being, South America has a wealth of underexploited native and exotic fruits of great interest for food technology, science and industrial applications, with many nutritional and functional properties yet to be uncovered (Garcia-Ruiz et al, 2017)
This study aimed to identify and quantify the content of rutin using high performance liquid chromatography (HPLC) and other bioactive compounds in the pulp and in the by-products of tropical fruits from Brazil
The results shows the large amount of bioactive compounds found in by-products, that have beneficial properties for health, and which are mostly wasted
Summary
Concerning the use of healthy diets and well-being, South America has a wealth of underexploited native and exotic fruits of great interest for food technology, science and industrial applications, with many nutritional and functional properties yet to be uncovered (Garcia-Ruiz et al, 2017). Rutin (3-O-rutinoside, quercetin) is used in the prevention or treatment of different health problems. Known as vitamin P, rutin has antiviral, antiallergic, anti-inflammatory, antitumor and antibacterial properties due to its polyphenolic nature, and has a radical scavenging activity and metal chelating properties (Nasirizadeh et al, 2012). The major problem in processing fruits is a lot of agro-industrial by-products generated These by-products have excellent nutritional quality, as recent studies have shown that the bioactive compounds present in fruits are concentrated mostly in the peels and seeds (Leao et al, 2017). Adding value to these by-products is of economic and environmental interest
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