Longitudinal Monitoring During Intermittent Fasting Protocols in Obese Adults

Who May Qualify: - Age between 18-50 years, both inclusive - Obese, BMI between 30 and 40 kg/m\^2 (obesity grade I or II), both inclusive - Non-smoker - Good knowledge of German or English language - Stable weight change (change \< +/- 3% current bodyweight) for 3 months prior to the study - HbA1c \< 6.5% without glucose lowering medication - LDL-cholesterol \< 4.6mmol/l without lipid lowering medication Who Should NOT Join This Trial: - Participants who have a fasting period of \> 12h per day on a regular basis and do not eat at least three main meals per day. - Current habitual use of dietary supplements (e.g., vitamins, minerals) and/or unwillingness to cease intake of dietary supplements. - Antibiotics intake during 3 months prior to the study due to possible interference with metabolic parameters - Food intolerances, allergies and sensitivities (severe food allergies) or dietary restrictions (e.g. vegan lifestyle) - Acute or chronic infections, malignant disease, renal, hepatic (more than two-fold increased transaminases), pulmonary, neurological (epilepsy) or psychiatric diseases, manifested atherosclerosis, or any other disease precluding participation in the study. - Diabetes - Known alcohol, substance or drug abuse, concomitant medication - More than four hours of physical exercise per week - Women who are pregnant, breast-feeding or aiming to become pregnant during course of the trial - Women and men on hormonal supplementation - Women with an irregular menstrual cycle according to the FIGO criteria - Therapy with antidepressants within the past 6 months - Regular therapy with acetylsalicyclic acid or current medication to regulate blood sugar, blood pressure or lipids - Participants likely to fail to comply with the study protocol - Participants who do not give willing to sign a consent form Always talk to your doctor about whether this trial is right for you.