About this trial
The goal of this clinical trial is to understand how level of adherence with time-restricted eating (TRE) predicts change in diurnal rhythms (as measured using the amplitude of diurnal peripheral clock gene expression), and how those changes predict lower mania and depressive symptoms, and downstream improvements in quality of life. The effects of diurnal amplitude of clock gene expression is expected to remain significant when controlling for change in glucose tolerance and inflammation. Participants will be enrolled who are already receiving medication treatment for bipolar disorder. Participants will complete daily measures of eating, sleep and mood for two weeks, and then will be assigned to follow TRE for eight weeks. Symptoms and Quality of Life will be measured at baseline and during and after the food plan.
Eligibility criteria
Qualifiers
Meets diagnostic criteria for bipolar I disorder or bipolar II disorder (but not cyclothymia, bipolar disorder Not otherwise specified or bipolar disorder due to another medical condition) assessed by the Diagnostic Interview for Anxiety, Mood, and Obsessive-compulsive and Related Neuropsychiatric Disorders [DIAMOND])
current sleep (insomnia, hypersomnolence) or circadian sleep-wake (delayed phase, advanced phase, irregular sleep-wake, non-24-hour sleep-wake-type) concerns indicated by endorsement of at least some sleep or circadian-related impairment across the screening self-reports or interview
Living in an English-speaking country (and one that the researchers have expertise in research procedures and diet)
Has been speaking English for at least 10 years, speaks English in the home, or certifies that they are able to understand English well for the study and demonstrates this during the screening interview.
Disqualifiers
Current episode of depression, hypomania or mania, or psychosis (assessed by the DIAMOND), Participants with acute mood disorder episodes will be encouraged to seek treatment and to consider the study when symptoms have remitted.
Eating disorder diagnosis (by self-report of treatment or diagnosis at any point during their life, Short Eating Disorder Examination Questionnaire (EDE-QS) scores above clinical concern thresholds for eating disorders, or DIAMOND interview of symptoms during adulthood)
Past 3-month alcohol use disorder or substance use disorder (assessed by DIAMOND)
Active suicidal ideation coupled with plan, intent or attempt history as assessed by Columbia Suicide Severity Rating Scale
Trial design
Treatments tested in this trial
- Time-restricted eating for 8 weeks
Treatment groups
Sponsors and collaborators
University of California, Berkeley
Lead sponsor
Salk Institute for Biological Studies
Collaborator
University College, London
Collaborator
Swinburne University of Technology
Collaborator
Deakin University
Collaborator
University of British Columbia
Collaborator
Wellcome Trust
Collaborator