Bioaccessibility and antioxidant activity of phenolic compounds in frozen pulps of Brazilian exotic fruits exposed to simulated gastrointestinal conditions

• Published in: Food research international 2017-10, Vol.100 (Pt 1), p.650-657
• Main Authors: Dutra, Rodrigo Luiz Targino, Dantas, Aline Macedo, Marques, Débora de Araújo, Batista, Jéssica Dayanne Ferreira, Meireles, Bruno Raniere Lins de Albuquerque, de Magalhães Cordeiro, Ângela Maria Tribuzy, Magnani, Marciane, Borges, Graciele da Silva Campelo
• Format: Article
• Language: English
• Subjects: Anacardiaceae - chemistry; Antioxidants - analysis; Antioxidants - chemistry; Apocynaceae - chemistry; Biological Availability; Brazil; Chromatography, High Pressure Liquid; Digestion; Frozen pulp; Fruit - chemistry; Fruit processing; Gastric Juice; Hancornia speciosa; In vitro digestion; Models, Biological; Phenols - analysis; Phenols - chemistry; Plant Extracts - chemistry; Spondias mombin × Spondias tuberosa; Spondias purpurea
• ISSN: 0963-9969; 1873-7145
• DOI: 10.1016/j.foodres.2017.07.047

This study characterized the phenolic profile in siriguela, umbu-cajá and mangaba, as well in their frozen pulps (FPs). The bioaccessibility of phenolic compounds and the antioxidant activity of the FP dialysates were determined following exposure to simulated gastrointestinal conditions. The profile of phenolic compounds identified in fruit and FPs were relatively similar. After pulp processing, increases of 33.60% and 68.72% in free phenolics were observed for mangaba and umbu-cajá, respectively, whereas in siriguela, the free phenolic was reduced by 56.55%. Generally, phenolic levels decreased after exposure to simulated gastric conditions in all FPs. The bioaccessibility of phenolics varied among the evaluated FPs. The highest bioaccessibility was observed for gallic acid in the umbu-cajá FP (73.92%) and the lowest for gentisic acid in the mangaba FP (8.71%). Siriguela and umbu-cajá FP dialysates presented the highest capacity for the capture of the radical 2,2′-diphenyl-2-picrylhydrazyl hydrate, whereas the mangaba FP dialysate demonstrated the highest iron reducing capacity. [Display omitted] •Pulp processing increases free phenolics in mangaba and umbu-cajá.•The bioaccessibility of the same phenolic varied in distinct frozen pulps.•The free phenolic compounds presented high bioaccessibility in Brazilian exotic fruits.•The dialysate of mangaba frozen pulp showed the highest iron reducing capacity.