Several studies report changes in food preferences in favor of low energy density foods after bariatric surgery and changes in scores of liking and desire to eat, as well as changes in hedonic evaluation certain foods. However, only one study was held in a more realistic condition of consumption by using real food, looking at some aspects of food preferences and giving contradictory results. We hypothesise that food preferences are different between obese people with and without a bariatric surgery. The main objective of this study is to compare the differences in food quality (proportion of total energy intake from foods with high energy density versus foods with low energy density), evaluated during a standardized and validated buffet between adult women with severe complicated or morbid obesity and women who have undergone bariatric surgery in the last 12 months.

Inclusion Criteria:

• Woman from 18 to 65 years old (included)
• Person capable of going to the Institut Paul Bocuse Research Center, Bellecour platform, 20 Place Bellecour, 69002 Lyon
• Person who agree to participate in the study
• Person having signed the consent of image rights
• For the surgery group: person who has undergone bariatric surgery (except gastric band)
• For the control group: person with a BMI ≥ 35 kg / m2 who did not benefit from bariatric surgery

Exclusion Criteria:

• Person with a food allergy or food intolerance to at least one of the study products
• Person excluding certain foods from their diet for religious or personal reasons.
• Person who smoke
• Person with severe digestive disorders, dysphagia, abdominal pain
• Person who cannot give her agreement, not mastering the French language
• Person who has exceeded the annual amount of compensation in the year for participation in research protocols
• Pregnant or breastfeeding woman or not taking effective contraception
• Person with a history of pathology which may interfere according to the investigator with the criteria of the study (ENT, neurological, upper digestive pathologies, ...)
• For the surgery group: conversion of any type of bariatric surgery

This study will focus on adult female volunteers with severe complicated or morbid obesity who may or may not have undergone bariatric surgery in the past 12 months.