Participants. Twelve healthy nonsmokers (6 women, 6 men) with a
mean age of 29 y (range: 26–39 y) and a mean BMI of 22.3 kg/m2 (range:
20.2–24.6 kg/m2) participated in this study. The inclusion criteria were
age between 18 and 40 y, nonsmoking, and normal weight [BMI between
18.5 and 24.9 kg/m2 (14)]. The exclusion criteria were any known
diseases, pregnancy, lactation, the use of dietary supplements, any
medication (except contraceptives), and blood donation 30 d prior to
or during the study. Inclusion and exclusion criteria were checked by
questionnaire.