BioXtra Dry Mouth Oral Gel BioXtra Dry Mouth Oral Gel is a saliva substitute that provides immediate, long-lasting relief from dry mouth, especially at night. It works by lubricating dry oral surfaces, helping to keep gums moist and comfortable. It also supplements and activates the saliva's natural defence mechanisms and promotes the pH level required for a healthy mouth. BioXtra Dry Mouth Oral Gel is unflavoured, safe for diabetics and is recommended for use under dentures. BioXtra Dry Mouth Oral Gel contains a high percentage or purified water and is formulated with xylitol, salivary enzymes and colostrum extract. Used daily, the advanced formulation in BioXtra products gently eases the sensations of dry mouth, helps reduce unwanted bacteria and leaves your mouth feeling fresh and comfortable, day and night.