This open and balanced cross-over study consists of two dietary treatment phases (either Virgino (R) CTPRO or butter) for 6 to 8 weeks. They are separated from each other with an eight-week washout period. At the end of both periods and 12-hour fasting an oral glucose-fat tolerance test is carried out. Except glucose, the test consists cream (after the butter phase) and CTPRO (after the CTPRO phase).