Taste inhibition through the use of an air flow

A method to suppress appetite of a human comprising:

• causing a convective flow of air into a nose toward an oropharynx of the human during consumption of food or beverage by the human, thereby causing a reduction in a flow of food and beverage odorants from an oral cavity up a nasopharynx to an olfactory bulb of the human, wherein causing the convective flow of air into a nose toward an oropharynx of the human comprises:
• directing, by a device worn on a head of the human, a flow of air at a face of the human and into the nose of the human during the consumption of food or beverage, wherein the flow of air has a direction which forms an angle between 0° and 90°, with 0° representing an angle pointed vertically upward from a chin to a forehead of the face and 90° representing an angle pointed directly at the face, wherein the device comprises a headset, a fan, and a tube, and is adapted to direct air at the face of the human and into the nose of the human during the consumption of food or beverage.