 This short-term human nutrition study comprises in a cross-over design testing either a potentially satiety product, resistant starch type 3 RS3 or an equivalent amount heterogeneous natural fibre in 24 healthy- obese volunteers, aged 18-65 years old, Body Mass Index BMI between 27 and 35kgm2 from both genders after an initial 21 day weight-loss programme, in free- living conditions. Dietary intake, body weight, blood pressure would be monitored through the study. Faecal, urine and blood samples will be collected to monitor, glucose, insulin, gut peptides and assess metabolites of dietary and microbial origin. Gut transit will be monitored in six volunteers using a wireless motility device SmartPillTM 