A f-MRI Study Of Affective Changes Associated With Four Weeks Consumption Of A Fermented Dairy Product In Healthy Women

Inclusion Criteria: * Healthy women, right-handed, aged from 18 to 60 years * Subject of normal body weight or with overweight i.e. not obese (body mass index between 18 and 30 kg/m2). * For fertile women, complying with one of the other medically approved methods of contraception Exclusion Criteria: * Subject with any current psychiatric or eating or suicidal attempt disorder, or history of such disorder. * Subject with any history of chronic GI disorder or disease. * Subject with any significant active or prior metabolic disorder or disease. * Subject with any use of probiotic supplements or antibiotics in the previous month. * Subject with current use of any medications with potential central nervous system effects (antidepressants, anxiolytics, opiate pain medications...). * Subject with allergy or hypersensitivity to milk proteins or lactose intolerance or immunodeficiency * Subjects with claustrophobia or other condition (such as metallic implants) that would preclude MRI scanning