Influence of the Urolithin A on the Population With BMI Higher Than 30 During Restricted Eating.

Enrolling by invitation · Not applicable · Has a placebo group

Conditions studied: Obesity & Overweight

In brief

Purpose. This study will test whether daily Urolithin A (500 mg) for 6 months helps adults with obesity lose weight while preserving functional muscle mass and improving markers of mitochondrial health, inflammation, and metabolism. All participants receive the same structured lifestyle program (nutrition and sleep guidance); half will receive Urolithin A and half a matching placebo. Background. Weight loss can improve health but may also reduce skeletal muscle, especially in people with obesity. Aging and obesity are both linked to mitochondrial dysfunction, impaired autophagy/mitophagy, oxidative stress, and low-grade inflammation. Urolithin A is a gut-derived, diet-related compound that promotes mitophagy and may support muscle function and metabolic health. Design. Single-center, randomized, placebo-controlled, parallel-group trial. About 100 adults aged 30-60 years with BMI \>30 kg/m² and elevated visceral adiposity will be enrolled and randomized in a 1:1 ratio (stratified by sex and age ≤45 vs ≥45 years). Blinding will include participants, study staff, and assessors. Intervention. Urolithin A 500 mg orally once daily vs matching placebo, for 24 weeks. A standardized lifestyle program for all participants: individualized energy restriction with higher protein intake, reduced carbohydrates, and time-restricted eating (11-hour eating window / 13-hour overnight fast); plus structured sleep-hygiene recommendations and light daily activity guidance. No other dietary supplements are allowed during the study. Main assessments. At baseline and regularly during the study, participants will undergo: Body composition by bioimpedance (InBody), including skeletal muscle and visceral fat indices. Muscle function (handgrip dynamometry; 30-second chair-stand). Cardiometabolic and inflammatory biomarkers from blood (standard biochemistry, lipids, glucose/HbA1c, CRP; exploratory cytokines/adipokines). Mitochondrial/aging biomarkers, including DNA-based epigenetic aging measures. Cardiovascular/ANS function (heart-rate variability and vascular indices; MaxPulse Medicore). Questionnaires on sleep quality, physical activity, and weight-management self-efficacy. Visits and duration. 6-month participation with baseline, 3-weekly check-ins, and a final visit for repeat testing and blood sampling. Outcomes. The study focuses on safety and on whether Urolithin A, compared with placebo, helps preserve functional muscle mass and improves mitochondrial, inflammatory, and metabolic biomarkers during weight loss. Who can join. Adults 30-60 years with obesity and higher visceral fat who are willing to follow the lifestyle program. Key medical exclusions (e.g., diabetes, active autoimmune disease, pregnancy) and supplement restrictions apply; full criteria are provided in the Eligibility section. Potential benefits and risks. Participants may benefit from weight loss support and close monitoring. Risks include blood draw discomfort and potential, usually mild, supplement-related side effects. Safety will be monitored throughout. Location and sponsor. The study is conducted at Charles University, Faculty of Medicine in Hradec Králové (Czech Republic) under the Department of Preventive Medicine.

Key facts

Study ID: NCT07377136
Run by: Charles University, Czech Republic
People needed: 100
Starts: 2025-10-08
Expected to finish: 2026-12-31
Last updated by the study team: 2026-02-19

Who can join

Age: 30 and older, up to 60. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

Age 30-60 years (inclusive) at screening
BMI > 30 kg/m² at screening
Visceral fat level ≥ 12 by segmental bioimpedance (InBody) at screening
Able and willing to follow the standardized lifestyle program (individualized energy restriction with higher protein, reduced carbohydrates, time-restricted eating 11:13) and sleep-hygiene guidance for 24 weeks
Willing to attend baseline and \~3-weekly follow-ups; undergo blood draws, bioimpedance, MaxPulse testing, and muscle strength/endurance tests; and complete questionnaires (WEL, PSQI, GPAQ)
Medication stability: chronic medications (e.g., treated hypertension, antidepressants) stable for ≥3 months before baseline; only clinically necessary changes allowed during the study
Permitted conditions/therapies (if stable): common allergies/atopic eczema; food intolerances; contraception and menopausal hormone therapy
Women of childbearing potential: negative pregnancy test at baseline; agreement to use highly effective contraception during the study and for 4 weeks after last dose; not breastfeeding
Able to provide written informed consent

You may not qualify if…

Known thyroid disease (untreated/unstable hypothyroidism or hyperthyroidism)
Type 2 diabetes mellitus (diagnosed or on glucose-lowering therapy)
Autoimmune disease, including psoriasis
Inflammatory bowel disease or other chronic inflammatory GI disorders (e.g., Crohn's disease, celiac disease)
Dyslipidemia treated with statins
Pregnancy, lactation, or planned pregnancy during the study period
Active malignant disease
Cognitive impairment or neurodegenerative disease that may affect consent or adherence
Severe psychiatric disorder that would preclude participation (e.g., severe major depression) or unstable depression/medication changes within the past 3 months
Uncontrolled comorbidity or decompensated chronic disease (e.g., uncontrolled hypertension; systolic ≥175 mmHg at screening)
Severe or limiting musculoskeletal condition preventing participation in assessments or the lifestyle program
Use of non-study dietary supplements (vitamins, herbal/nutraceutical products) that the participant is unwilling or unable to discontinue from baseline through end of study
Known allergy/intolerance to Urolithin A or capsule excipients
Any condition that, in the investigator's judgment, makes participation unsafe or could compromise data integrity

Where it is running

Charles University, Faculty of Medicine in Hradec Kralove — Hradec Králové, Czechia

Full record on ClinicalTrials.gov

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