Figure 1.

Experimental design and procedures. Open label, single arm, proof-of-concept study on the effect of a prebiotic fibre in healthy men. The study consisted of a pre-administration phase (14 d), an administration phase (28 d) and a post-administration phase (14 d). During 4-day evaluation periods at the end of the pre-administration phase (blue), early administration phase (red), late administration phase (orange) and end of the post-administration phase (green) the diet was standardized and the study outcomes were measured.