Endocrine and Neural Control of Eating in Women

Inclusion Criteria: * Physically and psychiatrically healthy women * Stable body weight (no changes ≥ 5 kg in past year) * Age 18-35 years * Regular menses (26-32 d cycles) * Right-handed * German language fluency * Signed informed consent Exclusion Criteria: * Life history of eating disorders * Aversion to the test foods * Pacemaker or neurostimulator * Hearing aid * Surgery to head or heart * Potential metal parts in body (pacemakers, metal splinters, gun wounds, shrapnel or surgical clips) * Neurological or psychiatric problems or serious brain injury (such as alcohol or drug abuse, depression, schizophrenia, bipolar disorders, anxiety disorder, claustrophobia, Parkinson's disease, multiple sclerosis, epilepsy) * High blood pressure, low blood pressure, history of heart disease, irregular heart rate * Emphysema, chest or respiratory problems (including difficulty breathing through the nose) * Pregnancy, nursing or pregnancy planned in next three months * History of gall bladder disease or symptoms (right upper abdominal quadrant pain after meals) * Polycystic ovary syndrome, as gauged by testosterone levels * Allergy or sensitivity to lactose * Allergy to quinine * Current or previous malignancies * History of difficult blood sampling