An observational study in Health Behavior and Healthy, sponsored by Charite University, Berlin, Germany. Completed at 1 site in Germany. Open to participants aged 18 Years to 69 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-12-14.
Sponsored by Charite University, Berlin, Germany · Observational
The aim of the study is to find out the effects a specific religious fast (i.e. Bahá'í fast) has on certain metabolic parameters, hydration, psyche and circadian clock. In a follow-up questionnaire series in 2019 we want to additionally validate a specific questionnaire for Bahai fasting, which was developed in 2018.
Followers of the Bahá'í Faith worldwide follow a yearly fasting tradition, where they fast intermittently for nineteen days. The intermittent fast is defined as abstinence from any food, drink and smoking from sunrise until sunset. These nineteen days are always in March and so do not coincide with climatic extremes in any country worldwide. This makes this kind of fasting a good model to study the psychological and medical effects of intermittent fasting in humans.
967 studies on the registry are indexed under Health Behavior; 165 are open to participants now.
This study's enrollment of 145 is below the median of 219 across 131 observational studies indexed under Health Behavior.
Browse Health Behavior studies →Charite University, Berlin, Germany is the lead sponsor of 857 studies on the registry; 129 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Members of the Bahá'í community residing in Germany
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Exclusion Criteria for subsample (energy metabolism measurements and microdialysis)
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Intermittent Fasting with abstinence from food and drink daily from sunrise to sunset for nineteen consecutive days in March 2018
Serum Osmolarity
Measured in subsample of study participants (venous blood sample) osmol/l
Time frame: 12 hours
In 2019: Validation of new questionnaire
New questionnaire, developed in 2018, regarding Bahai fasting
Time frame: 1 hour
Urine Osmolality
Measured in subsample of participants, in spontaneous Urine sample and 12h/24h Urine samples osmol/kg
Time frame: 24 hours
Acid-base balance
Measured in subsample of study participants (venous blood sample) Measured with Radiometer, Base excess (mmol/l)
Time frame: 5 Minutes
Questionnaire: HADS (Hospital Anxiety and Depression Score)
Anxiety and depression
Time frame: 5 Minutes
Systolic and diastolic blood pressure
Measured in subsample of study participants Measured by clinician, mmHg
Time frame: 5 Minutes
BMI
Measured in subsample of study participants Quantitative, kg/m2
Time frame: 10 Minutes
Microdialysis
Measured in subsample of study participants
Time frame: 3 hours
Indirect calorimetry
Measured in subsample of study participants
Time frame: 2 hours
Individual Interview
Measured in subsample of study participants
Time frame: 30 Minutes, three times during study
Activation of clock genes
Measured in subsample of study participants Measured in monocytes
Time frame: 3 Minutes
This study is completed, as verified in Dec 2022. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Charite University, Berlin, Germany →