Table 2.

Intestinal permeability at different gastrointestinal tracts, according to BMI.

	Normal Weight	Overweight	Obese
Number	45	30	45
Stomach (sucrose recovery, %)	0.03 ± 0.003	0.03 ± 0.003	0.04 ± 0.004
Median	0.03	0.03	0.03
Range	0.01–0.13	0.01–0.1	0.01–0.17
Small intestine (lactulose/mannitol, ratio)	0.018 ± 0.001	0.018 ± 0.002	0.02 ± 0.001
Median	0.016	0.014	0.02
Range	0.007–0.046	0.004–0.047	0.001–0.044
Colon (sucralose recovery, %)	0.99 ± 0.06	1.24 ± 0.09	1.37 ± 0.13 *
Median	1.06	1.18	1.14
Range	0.18–1.93	0.51–2.33	0.18–4.2

Data expressed as mean ± SEM. Differences tested by one-way ANOVA. Significance levels: * p < 0.05 vs. normal weight.