Postprandial cysteine/cystine redox potential in human plasma varies with meal content of sulfur amino acids.

ABSTRACT: Few data are available on plasma redox responses to sulfur amino acid (SAA) loads. In this study, we had 2 aims: to determine whether the SAA content of a meal affected postprandial plasma cysteine (Cys), cystine (CySS), or redox potential (E(h)CySS) in humans and whether SAA intake level (adequate or inadequate) in the days preceding the meal challenge affected these postprandial levels. Eight healthy individuals aged 18-36 y were equilibrated for 3 d to adequate SAA, fed chemically defined meals without SAA for 5 d (inadequate SAA) and then fed isoenergetic, isonitrogenous meals with adequate SAA for 5 d. On the first and last days with the chemically defined meals, a morning meal containing 60% of the daily food intake was given, and plasma Cys, CySS, and E(h)CySS were determined over a

SUBMITTER: Park Y 

PROVIDER: S-EPMC2838622 | biostudies-literature | 2010 Apr

REPOSITORIES: biostudies-literature