Clinical trials
Diet clinical trials
Below are recruiting diet clinical trials, each written for real people, not researchers. We’re tracking 651 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06186869Recruiting
Diet and exercise for fatty liver disease
This study tests whether combining diet with two different exercise programs can help people who are overweight or obese and have fatty liver disease. The goal is to see which program works best to reduce liver fat and improve health.
Castellana Grotte, BariAges 18–65 - NCT06330246Recruiting
Study on gut bacteria for calcium kidney stones
This study looks at whether a specific gut bacteria called Oxalobacter formigenes can help people who form calcium oxalate kidney stones. You will eat a controlled diet and provide samples to see how your body handles oxalate, a substance that can lead to stones.
Birmingham, AlabamaAges 18–70 - NCT07613645Recruiting
Lifestyle changes to prevent recurring C. difficile infection
This study tests whether specific lifestyle changes during treatment for C. difficile infection (a serious gut bacteria infection) can help prevent it from coming back. You'll receive standard antibiotic treatment and follow a controlled diet while researchers track your recovery.
Ann Arbor, MichiganAges 18 years+ - NCT06933212Recruiting
Mediterranean diet for CADASIL and CAA
This trial is testing whether a Mediterranean diet (rich in fruits, vegetables, whole grains, and healthy fats) can help people with CADASIL or cerebral amyloid angiopathy (CAA) — two conditions that affect blood vessels in the brain. If you have one of these diagnoses, the study may help you understand how diet can support your brain health.
MilanAges 18 years+ - NCT07049224Recruiting
Beef vs. plant-based diet for muscle health in older adults
This study compares the effects of a diet containing beef versus a plant-based diet on how well your body builds muscle protein. It aims to find which diet better supports muscle strength and function in healthy older individuals.
Maastricht, LimburgAges 65–85 - NCT07118657Recruiting
Vegan diet's effect on gut health in kids with autoimmune hepatitis
This study looks at how a vegan diet changes the bacteria in the gut and how that affects diet and disease in children with autoimmune hepatitis. Healthy children are included as a comparison group.
New Delhi, National Capital Territory of DelhiAges birth–18 years - NCT06115265Recruiting
Ketogenic diet study for prediabetes and weight loss
This trial tests whether a ketogenic diet can help people with prediabetes or high blood sugar improve their health and lose weight. You eat very low-carb, high-fat foods to see if it lowers your blood sugar and reduces your risk of developing diabetes.
Albuquerque, New MexicoAges 18 years+ - NCT07402226Recruiting
Diet study for bloating with scleroderma
This study tests whether a special diet can help reduce bloating and stomach discomfort in people with scleroderma (systemic sclerosis). You'll follow a specific meal plan to see if it improves your digestive symptoms.
Ann Arbor, MichiganAges 18 years+ - NCT07438652Recruiting
Mediterranean vs paleo diet for rheumatoid arthritis
This 12-week study compares two diets (Mediterranean and paleo) to see which one better helps rheumatoid arthritis symptoms, muscle health, and quality of life. It is for adults aged 40 to 60 who have been diagnosed with rheumatoid arthritis.
Cairo, Al-ManialAges 40–60 - NCT07477522RecruitingPhase 1
High-fiber diet study for solid tumor patients
This trial tests whether eating a high-fiber diet can improve your gut health, metabolism, and immune system. It is for people with solid tumors who are able to eat or use a feeding tube.
Chengdu, SichuanAges 18–75 - NCT07494968Recruiting
Finding ways to track diet compliance in IBS patients
This study looks for signs in your body—like breath and blood tests—that can show how well you are following a special diet for IBS. It aims to find better ways to track diet compliance, which could help make dietary treatments more effective.
Ann Arbor, MichiganAges 18–65 - NCT07646262Recruiting
Gluten-Free vs Mediterranean Diet for Rheumatoid Arthritis
This study compares two eating patterns—a gluten-free diet and a Mediterranean diet—to see which might help reduce inflammation and improve symptoms in people with rheumatoid arthritis. You would follow one diet for the study period while your doctors monitor how you feel.
Gaziantep, ŞehitkamilAges 19–65 - NCT06057324Enrolling by invitation
Healthy eating study for Mediterranean families
This study helps families in Mediterranean areas switch to a more sustainable and healthy diet. It tests if new snack options can help your family eat better. Families with at least one child under 12 and one teen 12 or older can join.
Reus, TarragonaAges 3 years+ - NCT06538415Recruiting
Can peas and beans improve your skin health?
This study tests whether adding more peas, beans, and lentils (polyphenol-rich pulses) to your daily diet can improve your skin health by changing the natural bacteria living on your skin.
Gainesville, FloridaAges 45–65 - NCT07765979Recruiting
Diet plans for teenage hives
This study tests two diets — a Mediterranean diet and a low-histamine diet — to see if they help reduce hives in teenagers with chronic spontaneous urticaria. If your child qualifies, they will follow one of these diets for a period and we will monitor their symptoms.
IstanbulAges 12–18 - NCT07752446Recruiting
Mediterranean diet and time-restricted eating for ulcerative colitis
This study tests whether following a Mediterranean diet and limiting eating to a certain time window each day can help maintain remission in people with ulcerative colitis. It aims to see if this lifestyle change can keep the condition from flaring up.
Santiago, Santiago MetropolitanAges 18–60 - NCT04743271Recruiting
Test how food timing affects the body’s daily rhythms
This study looks at how the timing of meals (and daily timing habits) affects your body’s natural clock and related health measures. It involves healthy, generally low-risk participants and may help researchers understand how timing affects metabolism and sleep.
Portland, OregonAges 18–40 - NCT04101188Recruiting
Study how extra potassium affects blood vessels
This study looks at how eating more potassium may protect blood vessels in healthy people. You may be eligible if you have normal blood pressure and a normal heart rhythm test, and you do not have certain health conditions.
Newark, DelawareAges 18–45 - NCT05532137Recruiting
Phone app to help students follow a Mediterranean diet
This trial tests a mobile-phone app designed to help university students eat in a more Mediterranean diet pattern. If you join, the study will check whether using the app improves how consistently you follow that diet.
SevilleAges 18–65 - NCT07083076Recruiting
Regular diet vs low residue diet after colon surgery
This study compares a regular diet to a low residue diet (a diet low in fiber) after colon surgery to see if patients can eat normally without issues. It may help determine if a regular diet is safe and better for recovery.
Manhasset, New YorkAges 18 years+ - NCT06802276Recruiting
Smart underwear measures gas from diet
This study tests special underwear that can measure gas produced by digestion after eating different foods. Researchers want to see if the underwear can track how diet affects gas production.
Aurora, ColoradoAges 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 - NCT06528977Recruiting
Western diet's effect on heart and immune health
This study looks at how a typical Western diet affects heart health and immune function in healthy middle-aged adults. You will follow a carefully controlled diet for several weeks, and researchers will measure changes in your blood pressure, cholesterol, and immune markers.
Newark, DelawareAges 50–64 - NCT07649005Recruiting
How Salt and Potassium Affect Blood Vessel Health in Older Adults
This study explores how different amounts of sodium (salt) and potassium in your diet affect your blood vessels and heart health. Researchers will monitor your blood pressure and vascular function over time to understand these dietary effects better.
Tallahassee, FloridaAges 55–75
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Common questions
- Are there clinical trials for diet?
- Yes. Clin2 currently lists 651 recruiting diet 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 diet 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 diet 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.