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.

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

Inclusion Criteria:

• Age ≥ 18 years old
• Healthy volunteers
• Read, write and understand the French language
• Patient affiliated to a social security system
• Written and signed informed consent

Exclusion Criteria:

• head and Neck cancer history
• olfactory and gustatory disorder
• Refusal to participate in research
• Patient under guardianship, deprived of liberty, safeguard of justice

healthy volonteers without olfactory and gustatory disorder