Bioaccessibility of phytoene and phytofluene is superior to other carotenoids from selected fruit and vegetable juices

Abstract

Phytoene and phytofluene are major abundant dietary carotenoids largely ignored in the context of agro-food and health. The bioaccessibility of phytoene and phytofluene in tomato, carrot, blood orange (sanguinello cultivar), and apricot juices was analysed following simulated gastro-intestinal digestion with coffee cream as a lipid source, and compared with that of other main carotenoids from these matrices. The bioaccessibility of phytoene and phytofluene, and also total carotenoid bioaccessibility, followed the order: sanguinello>apricot>tomato>carrot. Phytoene was consistently the carotenoid with the highest bioaccessibility, up to 97%, generally followed by phytofluene. The higher bioaccessibility of these carotenoids could mainly be due to their marked difference in chemical structure and matrix distribution. For most juices, cis-isomers presented a higher bioaccessibility than their all-trans counterparts (P<0.05). The dietary source that provided highest amounts of potentially absorbable phytoene/phytofluene was by far tomato juice (5mg/250mL juice).

Keywords: Bioavailability; Colourless carotenoids; Digestion; Food matrix; Geometrical (cis/trans) isomers; Lycopene (PubChem CID: 446925); Phytoene (PubChem CID: 5280784); Phytofluene (PubChem CID: 6436722); α-Carotene (PubChem CID: 4369188); β-Carotene (PubChem CID: 5280489); β-Cryptoxanthin (PubChem CID: 5281235).