Clinical trials
Diet clinical trials
Below are recruiting diet clinical trials, each written for real people, not researchers. We’re tracking 626 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05862818Recruiting
Food timing study to see if it lowers diabetes risk
This study looks at whether changing when you eat can reduce the chance of developing diabetes. You’d need to be generally healthy and meet specific lifestyle and body-size requirements.
Boston, MassachusettsAges 18–45 - NCT04942093Recruiting
High-protein low-calorie diet before weight-loss surgery
This trial studies whether a higher-protein, lower-calorie diet before sleeve gastrectomy (a type of weight-loss surgery) changes outcomes after surgery. You may be able to join if you’re scheduled for the operation and meet specific health and safety requirements.
DieppeAges 18–65 - NCT06325722Recruiting
Low fat vs. low carb diet order and body fat change
This study compares how the order of low fat versus low carb diets affects body fat changes. It may help you understand which diet sequence works best for weight loss.
Bethesda, MarylandAges 18–50 - NCT06330246Recruiting
Testing a gut bacteria treatment for calcium oxalate kidney stones
This study tests whether giving a specific gut bacteria can help people with calcium oxalate kidney stones. It looks at whether the bacteria can change how the body processes oxalate, which may reduce stone formation.
Birmingham, AlabamaAges 18–80 - 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 - 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+ - NCT06081543Recruiting
Ketogenic vs. Mixed Diet for Heart Failure
This study compares a ketogenic (low-carb, high-fat) diet to a standard mixed diet in people with heart failure. It aims to see if the ketogenic diet can improve heart function and symptoms.
Columbus, OhioAges 18–80 - NCT06081426Recruiting
Ketogenic diet for bipolar disorder brain study
This study looks at how a ketogenic diet (very low carb, high fat) might affect brain function in people with bipolar disorder. Participants will follow the diet and have brain scans and blood tests to see how it helps mood and energy levels.
Pittsburgh, PennsylvaniaAges 18–40 - 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+ - NCT05708352RecruitingPhase 2
Ketogenic diet vs usual diet guidance for newly diagnosed glioblastoma
This trial tests whether a very low-carb, high-fat ketogenic diet helps people with newly diagnosed glioblastoma when combined with standard cancer treatment. You would compare this special diet guidance to the usual anti-cancer diet guidance while receiving the same standard-of-care treatments.
Los Angeles, CaliforniaAges 18 years+ - NCT04799301RecruitingPhase 1
Measure how much sugar you eat using blood and hair samples
This Phase 1 study tests whether “biomarkers” in your blood and hair can accurately measure how much sugar you consume. It may help researchers find better ways to track dietary sugar intake in future nutrition and health studies.
Phoenix, ArizonaAges 18–65 - NCT04401605Recruiting
Fermented foods diet for ulcerative colitis symptoms
This study tests whether adding fermented foods to your diet can improve symptoms of ulcerative colitis. It also looks at people with intestinal inflammation markers to see if diet changes may help them feel better.
Palo Alto, CaliforniaAges 18 years+ - NCT03615690Recruiting
Fasting-mimicking diet test for ulcerative colitis
This study tests whether a “fasting-mimicking diet” can improve mild to moderate ulcerative colitis. You would follow the study diet plan and be monitored to see if symptoms and disease activity change.
Palo Alto, CaliforniaAges 18–70 - NCT07866846Recruiting
Ketogenic diet for blood sugar side effects of pasireotide in acromegaly
This study tests whether a low-carbohydrate ketogenic diet can help manage high blood sugar caused by the medication pasireotide, which is used to treat acromegaly. If you are being considered for or already taking pasireotide and your blood sugar is rising, this diet might help you avoid or reduce the need for diabetes medications.
Leiden, South HollandAges 18 years+ - NCT06308757Recruiting
Studying a very low calorie keto diet for fatty liver disease with scarring
This trial tests whether a very low calorie ketogenic diet (a strict low-carb, high-fat diet) can help people with non-alcoholic steatohepatitis (NASH) who have liver scarring. Participants will follow this diet for a year and have two liver biopsies to see if their liver health improves.
BolognaAges 18 years+ - NCT06450977Recruiting
MIND diet study for people with multiple sclerosis
This study tests whether the MIND diet (a combination of the Mediterranean and DASH diets) can help people with multiple sclerosis (MS). Participants will receive meals and be monitored remotely, so you can take part from home.
Urbana, IllinoisAges 18–64 - 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 - NCT06067906Recruiting
Weight loss diet after pre-eclampsia in overweight women
This trial tests whether a special diet (either a low-calorie or a 'dissociated' diet) helps women who have had pre-eclampsia lose weight. It may help you reduce future health risks.
Le MansAges 18–45 - NCT07765979Recruiting
Mediterranean and low-histamine diets for teen hives
This study tests whether following a Mediterranean diet or a low-histamine diet can help reduce symptoms of chronic spontaneous urticaria (hives) in teens. It compares the two diets to see which one might work better for managing this condition.
Istanbul, IstanbulAges 12–18 - NCT06151405Recruiting
Diet study for adults with asthma
This study tests whether a specially designed diet plan can help adults whose asthma is not well controlled. You will use a smartphone app to track your food and symptoms, and the study will provide dietary guidance.
Baton Rouge, LouisianaAges 18–65 - 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 - NCT06605898Recruiting
Metabolic and lifestyle study for adults 45-64
This study tests a personalized diet and lifestyle program to improve metabolic health. It may help if you are between 45 and 64, do not smoke, and have no major digestive or liver conditions.
Urbana, IllinoisAges 45–64 - NCT07680452Recruiting
High-fiber diet and short-term fasting for melanoma patients on immunotherapy
This trial tests if a high-fiber diet and occasional short-term fasting can help melanoma patients respond better to immunotherapy. It aims to improve treatment outcomes by changing gut health.
Berlin, State of BerlinAges 18 years+ - NCT07675603Recruiting
Low-carb diet and cholesterol study
This study looks at how a low-carb, high-fat ketogenic diet affects cholesterol levels in healthy adults. It may help you understand how your body responds to this type of diet.
Bath, Bath and North East SomersetAges 18 years+
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Common questions
- Are there clinical trials for diet?
- Yes. Clin2 currently lists 626 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.