Inclusion Criteria:  Aged from 12 to 20 years old Diagnosed with restrictive anorexia nervosa, according to Diagnostic and Statistical Manual 5 (DSM 5) criteria and who have not yet entered the care pathway Affiliated with the social security scheme Good understanding of written and oral French Collection of informed consent from the adult subject Collection of informed consent from one of the two parents or holder of parental authority if the subject is a minor  Exclusion Criteria:  All pathologies that may explain an olfactory sensory disorder: genetic, neurological, neurosensory or rhino laryngeal pathologies (chronic bronchitis, polyps, etc.) History of participation in an olfactory sensory therapy group The restriction disorder or avoidance of food intake (ARFID, Avoidant and Restrictive Food Intake Disorder) Active smoking Intellectual disability (ITQ <70) Known allergy to essential or fragrant oils A urine pregnancy test will be performed for young women of childbearing age. Persons deprived of their liberty by a judicial or administrative decision, persons undergoing psychiatric treatment by virtue of .. Adults who are the subject of a legal protection measure or who are unable to express their consent. Foreseeable inability to comply with the instructions defined and exposed upon inclusion