Catabolism of raw and cooked green pepper (Capsicum annuum) (poly)phenolic compounds after simulated gastrointestinal digestion and fecal fermentation

  • Juaniz, I. (Isabel)
  • Ludwig, I. A. (Iziar Amaia)
  • Bresciani, L. (Letizia)
  • Dall’Asta, M. (Margherita)
  • Mena, P. (Pedro)
  • Del-Rio, D. (Daniele)
  • Cid, C. (Concepción)
  • Peña, M.P. (María Paz) de
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Publication date
January 2016
Publisher
Elsevier BV

Abstract

A total of 21 (poly)phenolic compounds (free and bound) were quantified in raw, olive oil fried, sunflower oil fried and griddled green pepper before and after a simulated gastrointestinal digestion. Flavonoids, particularly quercetin rhamnoside, were the main compounds. The bioaccessibility of (poly)phenolic compounds after gastrointestinal digestion was higher in cooked (>82%) than in raw (48%) samples, showing a positive effect of heat treatment on the release of (poly)phenols from the vegetal matrix. Additionally, a fecal fermentation was carried out for 24h. A time-dependent microbial metabolic activity was observed, which resulted firstly (<5h) in the hydrolysis of flavonoid glycosides and then in the formation of 3 catabolites, namel...

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