Clinical trials
Diet clinical trials
Below are recruiting diet clinical trials, each written for real people, not researchers. We’re tracking 627 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05766774Recruiting
Diet study for adults with cystic fibrosis and high sugar intake
This trial studies whether changing eating habits—especially added sugar intake—affects health in adults with cystic fibrosis. It may help by testing a diet approach aimed at better outcomes related to metabolism and overall health.
Atlanta, GeorgiaAges 18 years+ - NCT05708716Recruiting
Diet and brain training for people after blood cancer
This study tests whether a combined diet plan and structured brain (cognitive) training can improve thinking and memory in people who have had blood cancer. It may help survivors who already have mild-to-moderate thinking problems.
Birmingham, AlabamaAges 21 years+ - NCT05706155Recruiting
Switching some animal protein to plant protein for Type 2 diabetes
This study tests whether replacing part of your animal protein with plant-based protein can improve Type 2 diabetes control. It may help your blood sugar and weight management without changing everything about your diet.
Porto Alegre, Rio Grande do SulAges 18–65 - NCT05640843Recruiting
Plant-based diet study for MGUS or smoldering myeloma
This trial tests whether a whole-food, plant-based eating pattern—plus supplements or placebo—can improve health outcomes in people with MGUS or smoldering multiple myeloma. You may be asked to follow specific recipes and stop certain supplements, so it helps to confirm you can stick with the plan.
Atlanta, GeorgiaAges 18 years+ - NCT05599139Recruiting
Testing iodine uptake after a low-iodine diet
This study looks at how much iodine your body absorbs after you follow a low-iodine diet before radioactive iodine treatment (131I) for thyroid cancer. It may help improve how safely and effectively this treatment is planned.
Groningen, Provincie GroningenAges 18–75 - NCT05417568Recruiting
Testing how oxalate responses differ in kidney stone patients
This study looks at how the body reacts to oxalate in people with calcium oxalate kidney stones and in people without kidney stones. It may help researchers understand why some people form stones and how to better prevent them.
Birmingham, AlabamaAges 18–60 - NCT04974593RecruitingPhase 3
Test breath testing to guide a lactose-free diet in IBS
This trial studies whether a breath test (hydrogen/methane lactose testing) can predict who with IBS will improve on a lactose-free diet. If you have moderate-to-severe IBS and regularly eat lactose-containing foods, the test result may help tailor your diet approach.
Jette, Brussels CapitalAges 18–75 - NCT05120752RecruitingPhase 3
Low FODMAP diet trial for IBS without lactose intolerance
This trial tests whether eating a low-FODMAP diet can reduce IBS symptoms in people who do not have lactose intolerance. It aims to improve moderate-to-severe IBS symptoms by changing what kinds of carbohydrates you eat.
Jette, Brussels CapitalAges 18–75 - NCT05359848Recruiting
Intermittent fasting and plant-based eating during chemotherapy
This pilot study tests whether alternating periods of lower calorie intake, along with a plant-based diet, is safe and feasible for people receiving chemotherapy. If it helps, it could support better comfort and treatment tolerance during cancer therapy.
Buffalo, New YorkAges 18 years+ - NCT05197309Recruiting
Metabolic diet to help prevent relapse in anorexia
This study tests whether a specific diet can help people with anorexia nervosa stay well and avoid relapse after weight restoration. It focuses on “metabolic” (energy and blood sugar-related) effects, checked with blood work and regular visits.
New York, New YorkAges 18–40 - NCT04885959Enrolling by invitation
Study how an Asian diet affects gut bacteria and allergy risk in pregnancy
This study looks at whether eating a traditional Asian diet during pregnancy changes gut bacteria and body chemistry in a way that may lower (or change) a baby’s risk of developing allergies. You would follow the diet during pregnancy and be tracked after delivery.
Kota Bharu, KelantanAges 18–40 - NCT03979534Recruiting
Protecting Kidneys With a Low-Protein Diet
This study tests whether a step-by-step low-protein diet can help protect your kidneys if you have advanced chronic kidney disease (stages 4 or 5) or stage 3 that is getting worse quickly. The goal is to see if this diet approach can slow down kidney damage.
La FlècheAges 18 years+ - NCT03845036Recruiting
Diet and exercise study for leg circulation problems
This study looks at how diet changes and an exercise program may improve walking and leg symptoms in people with peripheral artery disease (PAD). You may be eligible if you have a history of claudication (leg pain with walking) and tests or treatment history show PAD.
Oklahoma City, OklahomaAges 40 years+ - NCT07298603Enrolling by invitation
Nutrition plan for women with PCOS
This study tests whether a specific nutrition plan can help women with PCOS improve their health. You would follow a guided diet and have check-ins to see how it affects your symptoms and well-being.
Samsun, AtakumAges 20–45 - NCT04141878Recruiting
Lifestyle program to help prevent dementia in adults with diabetes risk
This trial tests a structured lifestyle program (more activity and healthier eating) to help prevent or slow memory and thinking problems. It may be helpful if you’re older but not showing major memory impairment, and you can commit to weekly study activities for about 8 months.
Walnut Creek, CaliforniaAges 60 years+ - NCT07132788Recruiting
Study of pulmonary arterial hypertension and lean muscle mass
This study looks at how pulmonary arterial hypertension (PAH) affects lean muscle mass. It aims to understand the relationship between PAH and muscle loss, which could help improve treatments and quality of life.
Philadelphia, PennsylvaniaAges 18 years+ - NCT07597980Recruiting
Exercise and diet program to strengthen muscles in older adults
This study tests whether a lifestyle program combining exercise and nutrition can help adults over 50 improve their muscle strength and function. You'll work with researchers to see if this approach helps with mobility and overall health.
Baton Rouge, LouisianaAges 50 years+ - NCT03156478Recruiting
Online coaching to help people at risk of diabetes
This study tests an online, knowledge-based program to help people lower their risk of developing diabetes. It is meant for adults who are not diagnosed with diabetes yet but have risk factors such as abnormal blood sugar tests.
KuopioAges 18–70 - NCT04275453RecruitingPhase 1/Phase 2
Test diet vs ketone drinks to reach ketosis safely
This early-stage study compares how quickly and effectively a low-carbohydrate diet versus taking ketone supplements helps the heart use less sugar (measured with PET/CT scans). It also looks at how long it takes to reach a “ketosis” state, which may be helpful for metabolic health.
Philadelphia, PennsylvaniaAges 18 years+ - NCT01945840Recruiting
Study how gut hormones change after weight-loss surgery
This study looks at how gut hormones and blood sugar control change after Roux-en-Y gastric bypass. It may help researchers understand what supports healthier glucose levels after bariatric surgery.
London, Greater LondonAges 18–70 - NCT04965545Recruiting
Tests for diagnosing Wilson disease using special lab findings
This trial is for people who already have a genetic diagnosis of Wilson disease. It looks at whether specific lab tests and a physical eye finding can help confirm and support the diagnosis.
Hangzhou, ZhejiangAges 6–65 - NCT03335644Recruiting
Internet-based health study for people 15 and older
This study gathers health information through an online program. It may help researchers understand how diet and lifestyle affect health over time.
Bobigny, Seine Saint DenisAges 15 years+ - NCT05057598Recruiting
Online study for women with breast cancer experiences
This study asks women with breast cancer to take part in an online, before-and-after research project. It may help researchers understand your experiences and improve support for people living with breast cancer, including those with relapse or spread to other parts of the body.
Milan, MIAges 18–90 - NCT03951311Recruiting
Diet and lifestyle study for people with weaker heart pumping
This study looks at how metabolic changes, diet, and lifestyle patterns affect heart failure. It may help find ways to improve symptoms and health by targeting diet and daily habits.
Shanghai, Shanghai MunicipalityAges 14–90
Hear when a new Diet trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for diet?
- Yes. Clin2 currently lists 627 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.