Clinical trials
Fasting clinical trials
Below are recruiting fasting clinical trials, each written for real people, not researchers. We’re tracking 209 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06737224Recruiting
Fasting and exercise effects on immune health
This study looks at how a 48-hour fast, alone or combined with exercise, affects your immune system and blood sugar control. It may help explain how short-term fasting can improve health in active young adults.
Kelowna, British ColumbiaAges 19–35 - NCT06751043Recruiting
Testing if fasting before a procedure is needed in ICU patients
This trial tests whether not eating before a procedure (called preoperative fasting) is better than fasting in ICU patients who are already receiving tube feedings. It aims to find out if skipping the fast can help you without causing extra risks.
Palo Alto, CaliforniaAges 18 years+ - NCT05819801Recruiting
Testing how fasting affects outcomes in certain hand procedures
This study looks at whether fasting before a specific hand surgery done with local numbing medicine (and without a tourniquet) changes patient outcomes. It may help explain how to prepare for this type of procedure and what fasting rules are safest.
Orange, CaliforniaAges 18 years+ - NCT07518524Recruiting
Fast Recovery After Heart Valve Surgery
This trial compares two recovery approaches after heart valve surgery: one that wakes you up very quickly in the operating room, and one that's slightly less aggressive. Both use techniques that avoid large chest incisions. The goal is to see which approach gets you breathing on your own sooner and helps you recover faster.
Legnano, ItalyAges 18 years+ - NCT06959069Recruiting
Intermittent Fasting, Sleep, and Quality of Life Study
This study tests whether intermittent fasting can improve sleep and quality of life in healthy adults. If you are generally healthy and not on specific medications or diets, you may be able to join.
BrusselsAges 18–65 - NCT06748027Enrolling by invitation
Guidelines for long-term medical fasting
This study aims to create guidelines for long-term medical fasting. It is looking for doctors and clinics with significant experience in supervising patients who fast for 4 or more days with very low calorie intake.
Berlin, State of BerlinAges Any age - NCT07527208Recruiting
How Fasting Affects Your Immune System and Metabolism
This study looks at how a 3-day fasting period changes your body's immune system and how it burns energy. Researchers want to understand these changes in healthy young adults to learn more about how fasting affects health.
Ithaca, New YorkAges 18–40 - NCT06779201Recruiting
Fasting and its effects on metabolism and immunity
This study looks at how fasting affects your body's metabolism and immune system. It may help researchers understand if planned periods of not eating can improve health.
BeijingAges 18–65 - NCT07481513Recruiting
Intermittent fasting for perimenopausal women's mental health
This study tests whether intermittent fasting can improve mental health in women going through perimenopause (the years around menopause). If you're a woman aged 45-55 in this stage and not on certain treatments, this trial may help you understand how diet affects your mood.
BeirutAges 45–55 - NCT07447505Recruiting
High-protein, high-fiber pre-fast meal study
This trial tests if eating a high-protein, high-fiber meal before fasting helps you feel full longer and keeps your blood sugar stable. It may help people who fast and want to avoid hunger or sugar dips.
Al-Ahsa, Eastern ProvinceAges 18 years+ - NCT05832086RecruitingPhase 2
Fasting-mimicking diet to improve prostate cancer and metabolism
This trial tests whether an intermittent, fasting-like diet can help control metastatic prostate cancer and improve metabolic health in men on hormone therapy. Participants follow a specific diet plan and are monitored by the study team.
Duarte, CaliforniaAges Any age - NCT04607096Recruiting
Intermittent fasting to improve insulin in prediabetes or early type 2
This study tests whether intermittent fasting can improve how your body releases and uses insulin if you have prediabetes or early type 2 diabetes. It may help your blood sugar control without using insulin.
BerlinAges 18–70 - NCT04899102Recruiting
Intermittent fasting for fatty liver disease in adults
This study tests whether intermittent fasting can improve fatty liver disease (NAFLD) by reducing liver fat. It focuses on adults with confirmed fatty liver and extra liver fat seen on a special MRI scan.
Boston, MassachusettsAges 18 years+ - NCT07624617Recruiting
Fasting and Breast Cancer Treatment Study
This study looks at whether periods of fasting (eating for shorter time windows) might help improve how well a breast cancer medication called capivasertib works. You'll wear a glucose monitor, track your food, and follow fasting schedules while continuing your regular cancer treatment.
Minneapolis, MinnesotaAges 18 years+ - NCT05760339Recruiting
Intermittent fasting vs carbohydrate drinks before elective surgery
This study compares two ways of eating before planned (elective) orthopedic surgery: intermittent fasting versus carbohydrate drinks. It aims to see which approach is safer and works better around the time of surgery.
Amsterdam, North HollandAges 18 years+ - NCT05910567Recruiting
Ultrasound test for abdominal injuries in children after blunt trauma
This study looks at how well an abdominal ultrasound test (FAST) works for children who come to the emergency department after a serious blunt injury to the belly or torso. The goal is to help doctors find dangerous internal bleeding or organ injury quickly and safely.
Sacramento, CaliforniaAges Up to 17 years - NCT06307275Recruiting
Intermittent fasting for body fat and quality of life
This trial tests if intermittent fasting can help reduce body fat and improve how you feel day-to-day. It's for people who are generally healthy.
Loma Linda, CaliforniaAges 18–65 - NCT06323889Recruiting
Intermittent fasting study for adults with obesity
This study tests whether intermittent fasting (alternating periods of eating and fasting) can help with weight loss and health in adults with obesity. It aims to see if this approach is safe and effective.
Zurich, Canton of ZurichAges 18–50 - NCT06510972Recruiting
Eating versus fasting for ICU patients with breathing failure
This study looks at whether it's safe and helpful to let people with severe breathing problems in the ICU eat and drink normally instead of fasting. If you qualify, you may be assigned to either continue eating or to fast while doctors monitor your recovery.
BloisAges 18 years+ - NCT05104502Recruiting
Study how 36-hour water fasting affects immune signals
This study looks at how a 36-hour water-only fast changes immune-related markers and gut (microbiome) signals in healthy adults. It may help researchers understand how fasting could affect health, even though this trial is focused on people without major medical conditions.
Sacramento, CaliforniaAges 20–40 - NCT06893913Recruiting
Fasting plus exercise for dry eyes in psoriasis
This study tests whether adding a simple exercise (pyramidal exercise) to intermittent fasting can help reduce dry eyes in people who have psoriasis, prediabetes, and mild obesity. It aims to see if lifestyle changes can improve eye moisture.
Giza, DokkiAges 45–55 - NCT06996639Recruiting
Can eating before cardiac catheterization help? Study for heart patients
This study looks at whether it's safe to let patients eat a light meal before a scheduled heart catheterization, instead of fasting. It aims to improve comfort and experience for people with stable chest pain or certain types of heart attacks.
Tampa, FloridaAges 18 years+ - NCT07022951Recruiting
Million Anesthesia Cases Study on Preoperative Fasting
This study looks at how fasting before anesthesia affects recovery for people having procedures. Researchers want to understand what happens to patients when they have nothing to eat or drink before anesthesia.
Boston, MassachusettsAges Any age - NCT07446777Recruiting
Fasting and Mediterranean diet for multiple myeloma
This study tests whether a special diet—longer nightly fasting plus a Mediterranean eating pattern—can help people with multiple myeloma or its early stages. If you qualify, you will be randomly assigned to start the diet right away or join a waitlist group.
Miami, FloridaAges 18 years+
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Fasting trials by city
Studies with a site in or near these metro areas.
Fasting trials by state
Studies with a site anywhere in these states.
Common questions
- Are there clinical trials for fasting?
- Yes. Clin2 currently lists 209 recruiting fasting studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a fasting trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a fasting trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.