Clinical Evaluation of MucoPEG™ for Xerostomia

Inclusion Criteria: 1. Must have read, understood and signed an informed consent prior to entering the study. 2. Must be 18 years of age or older 3. Good general and mental health with, in the opinion of the investigator or their medically qualified designee, no clinically relevant or significant abnormalities found on examination of the oral cavity or in their medical history. 4. Participant with a Challacombe Scale score of 1 or higher 5. Participant agrees not to eat, drink, chew tobacco, chew gum, smoke, brush or floss their teeth for 2 hours prior to study visits 6. Participant agrees not to use any oral care products or any type of breath mint or lozenges for 2 hours prior to study visits 7. Participant agrees not to consume any food or liquid during the study visits, except for what is provided by the study research staff (e.g., water and treatments A and B during evaluation periods) 8. Participant agrees to using clinical oral care supplies provided by the investigators and no other products during the entire study 9. Understands and is willing and able to comply with all study procedures and restrictions Exclusion Criteria: 1. Women who are pregnant or intending to become pregnant over the course of the study, or who are found to have a positive urine pregnancy test at the Screening Visit 2. Women who are breast-feeding 3. Participant is currently undergoing radiotherapy and/or chemotherapy. 4. Any condition the investigator identifies that may impede the participant's ability to properly participate in the study. For example, Alzheimer's Disease 5. Participant with untreated oral mucosal disease which in the opinion of the investigator could interfere with the study. For example, presence of oral ulceration. 6. Evidence of gross intra-oral neglect or need for extensive dental therapy 7. Denture wearer (complete dentures) 8. Participant on systemic parasympathetic medications (e.g. pilocarpine) for treating dry mouth, but the dose requirement of which is unstable 9. Known or suspected intolerance or hypersensitivity to the study materials (or closely related compounds) or to any of their stated ingredients 10. Participation in another clinical study (including studies of cosmetic products) or in receipt of an investigational drug within 14 days of the screening visit 11. Previous participation in this study 12. Recent history (within one year prior to screening visit) of alcohol or other substance abuse