Breath Biomarkers for Sleep Loss and Circadian Timing

Inclusion Criteria: * Healthy Adults who are able to fall asleep in the study conditions * Beginning 2 hours before the study, participants will be asked to refrain from brushing their teeth, using mouthwash, eating or drinking anything (other than water), chewing gum, smoking, etc., until the study is complete. Exclusion Criteria: * Individuals on special diets (such as a very low carbohydrate diet) may be excluded * Acute or debilitating medical condition * Recent history of dental problems (gum disease, abcess, surgery) or current dental or mouth pain * Current use of stimulants, hypnotics, tranquilizers, Central Nervous System active substances, and/or antibiotics. * Use of products containing nicotine 24 hours prior to study