The study consists of the application of a swab soaked in iron sulfate at a concentration of 10g/l.~each patient will rate the intensity he/she perceives (on a numerical scale from 1 to 5) at each of the 4 predefined lingual locations
This is a mono center , observational study carried out within otorhinolaryngology department in CH Valence.~This is a descriptive and exploratory study in healthy volunteers. Based on the hypothesis that Metallic taste is imperfectly assessed, this study will provide a better understanding of the Metallic Taste.