E bitaminaren gehikuntza urdail-hesteetako in vitro digestioan: efektu antioxidatzailea edo prooxidatzailea?

Abstract

The aim of this study was to investigate the effect of linseed oil enrichment with d,l-alpha-tocopherol (200, 2000 and 20000 ppm) on the hydrolysis and oxidation undergone by lipidic components during in vitro gastrointestinal digestion. Proton Nuclear Magnetic Resonance (¹H NMR) was the technique employed. Although the addition of this synthetic form of vitamin E did not affect lipolysis, the advance of oxidation reactions increased in a concentration-dependent manner. This was evidenced by the increase of polyunsaturated chains degradation and of oxidation compounds generation. Under the conditions of this study, the formation of aldehydes and of conjugated dienes having a hydroxy or a keto group was favoured in the presence of alpha-tocopherol.