Virgin olive oil enriched with its own phenolic compounds or complemented with thyme improves endothelial function: The potential role of plasmatic fat-soluble vitamins. A double blind

Identificador:  imarina:6388956

Handle: https://hdl.handle.net/20.500.11797/imarina6388956

Autors:  Valls, Rosa-M; Farras, Marta; Pedret, Anna; Fernandez-Castillejo, Sara; Catalan, Ursula; Romeu, Marta; Giralt, Montse; Saez, Guillermo-T; Fito, Montserrat; de la Torre, Rafael; Covas, Maria-Isabel; Motilva, Maria-Jose; Sola, Rosa; Rubio, Laura

Resum:
© 2016 Elsevier Ltd The aim of the present study was to assess whether different functional virgin olive oils (FVOOs) with varying phenolic compounds (PC) could protect the plasmatic fat-soluble vitamins, which in turn could improve the endothelial function. In order to select the optimal phenolic dose in the improvement of ischemic reactive hyperemia (IRH), a dose-response study (n = 12, healthy subjects) was performed and the enrichment of 500 mg PC/kg oil was selected. In a 3-week cross-over sustained study (n = 33 hypercholesterolemic subjects), the consumption of 25 mL/day of two phenol-enriched olive oils (one enriched with its own PC and another combined with thyme PC) increased IRH and plasma concentrations of retinol, β-cryptoxanthin and α-tocopherol, compared to a control virgin olive oil. A positive post-intervention correlation was observed for IRH values and HDL-c, β-cryptoxanthin, lutein and α-tocopherol. Results suggest that preservation of plasmatic fat-soluble vitamins by PC from FVOOS could partially explain the endothelial function benefits.