An oral weight control device that inhibits the mastication and swallowing of food is provided. The oral weight control device is a dental appliance that includes upper and lower retainers, where each retainer covers the lingual, palatal and buccal side of the teeth to inhibit mastication of food. The dental appliance further includes left and right flexible food barriers extending from the upper retainer to the lower retainer on the lingual side of the teeth to prevent food that a user may attempt to masticate between the upper and lower retainers from being passed to the tongue of the user to ingest. The upper and lower retainers may be customized to fit on each user and may cover all the upper and lower teeth of the wearer on the lingual, palatal and buccal sides of the teeth. The retainers may be removable or semi-permanently secured to the teeth. The flexible material is made of an elastic material and/or is sized to allow the jaws of the wearer to be fully opened and closed when the dental appliance is worn.
