Clinical trials
Diet, Healthy clinical trials
Below are recruiting diet, healthy clinical trials, each written for real people, not researchers. We’re tracking 99 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07065643Recruiting
Calorie restriction study for healthy overweight adults
This study looks at how sex hormones affect the benefits of a low-calorie diet in men and women of different ages. If you are a healthy overweight adult, the study may help understand how hormones and age influence weight loss results.
AberdeenAges 18–65 - NCT05962372Recruiting
Culturally tailored diet program for adults in Puerto Rico
This study tests a diet program designed to fit Puerto Rico culture and daily life. It may help adults with weight or blood sugar or blood fat concerns improve their health through regular check-ins.
San JuanAges 30–65 - NCT04598022Recruiting
Study how diet affects the gut microbiome in new college students
This study looks at how different eating patterns (vegan, vegetarian, or omnivore) affect the bacteria in your gut over time. It may help researchers understand which diet patterns are linked to healthier gut function.
KielAges 18–25 - NCT07283328Recruiting
Methionine and Gut Bacteria Study in Healthy Adults
This study looks at how a diet low in methionine (a protein building block) affects the bacteria in your gut.
Montreal, QuebecAges 20–50 - NCT07594600Recruiting
Fiber Diet Effects on Breath Compounds in Healthy Adults
This study examines how different amounts of dietary fiber affect natural chemical compounds released in your breath. Researchers will measure these compounds to understand how fiber influences your gut health and digestion.
ÖrebroAges 18–65 - NCT07586111Recruiting
Plant Foods for Better Gut and Heart Health
This study tests whether eating more plant-based foods improves your gut bacteria, digestion, and heart health markers. You'll follow a structured diet plan for several weeks while providing blood, stool, and urine samples to measure changes.
LondonAges 30–70 - NCT06696222Recruiting
Fermented vegan diet for health and colitis
This trial tests whether a fermented vegan diet can improve health in people with inflammatory bowel disease (IBD), like ulcerative colitis or Crohn's disease, and in healthy volunteers. It aims to see how the diet affects the gut.
MalmöAges 18 years+ - 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 - 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+ - NCT06382298Recruiting
Cottonseed oil vs. similar oil for heart health
This study compares the effects of cottonseed oil versus a similar oil on heart health. It is for people with high cholesterol or who are overweight and want to see if changing cooking oils can improve their cholesterol levels.
Athens, GeorgiaAges 25–75 - NCT06338631Recruiting
Early kidney check in people with excess weight
This study looks for early signs of kidney problems in people with excess weight, even if they are otherwise healthy. It aims to understand how weight affects kidneys before any disease develops.
MilanAges 18–60 - 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 - NCT05709600Recruiting
Diet study during planned living kidney donation
This trial looks at whether specific diet changes can be safely used for people who are planning a living kidney transplant. It mainly aims to understand how diet might affect people during the donation/transplant process.
CologneAges 18 years+ - NCT06714656Recruiting
Making healthy, sustainable food swaps for young adults
This study helps young adults who eat a lot of red meat and want to switch to healthier, more sustainable food choices but aren't sure how. It will look at what makes it easier or harder to make those changes.
AberdeenAges 18–30 - NCT06166810Recruiting
Healthy gut bacteria and high fiber diet study
This study looks at gut bacteria in healthy people who eat a high fiber diet. If you are between 20 and 50, eat at least 5 fruits and vegetables a day, and meet other health criteria, you may be able to help researchers learn how diet affects good gut bacteria.
Clermont-FerrandAges 20–50 - NCT06188754Recruiting
Healthy lifestyle program for bipolar disorder and sleep issues
This study tests a healthy lifestyle program (including diet changes) for people with bipolar disorder who have sleep problems. It aims to improve sleep and overall well-being by teaching new habits.
Berkeley, CaliforniaAges 18–65 - NCT06979297Recruiting
Healthy Eating and Physical Activity for Latinas
This study tests a program to help Latina women eat more fruits and vegetables and get more physical activity using online resources. It might be a good fit if you want to improve your health habits.
Providence, Rhode IslandAges 18 years+ - NCT06209723Recruiting
Vegetarian diet study for recent heart attack patients and their partners
This study tests whether a vegetarian diet can help the immune system recover after a heart attack. It is for people who recently had a heart attack and their healthy partners.
NijmegenAges 18 years+ - NCT06051318Recruiting
Diet and gut microbiome effects on blood sugar in healthy adults
This study looks at how your gut bacteria and the foods you eat affect your blood sugar after meals. You'll wear a small sensor to track your blood sugar for 10 days and provide stool samples.
Florianópolis, Santa CatarinaAges 18–60 - NCT05545306Recruiting
Study tests how extra calories change your daily energy use
This study looks at how eating more calories affects your body’s natural heat production and total energy use over a full day. It may help researchers better understand how the body manages weight and energy.
Phoenix, ArizonaAges 18–60 - NCT05933707Recruiting
Study tiny vesicles and how they affect insulin
This study looks at how very small particles in the body (“extracellular vesicles”) relate to insulin action and how the body handles sugar. It may help researchers understand why some people have better or worse insulin responses.
St Louis, MissouriAges 25–55 - NCT07345572Recruiting
Early time-restricted eating for mild asthma
This study explores whether eating only during certain hours of the day (early time-restricted eating) can improve health and quality of life for adults with mild controlled asthma, compared to adults without asthma. Participants will follow a specific eating schedule for a period, and researchers will monitor outcomes.
Leicester, EnglandAges 18–65 - NCT06151015Recruiting
Dietary nitrate and calorie restriction for brain health
This study tests whether eating foods rich in dietary nitrates (like beets) combined with reducing calorie intake improves memory and blood vessel function in older adults.
Nottingham, NottinghamshireAges 60–75 - NCT07426003Recruiting
Healthy volunteer nutrition study with a special drink
This study looks at how healthy adults digest a special nutritional drink. Researchers want to understand normal digestion to help improve care for people with feeding tubes.
Philadelphia, PennsylvaniaAges 18–70
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Common questions
- Are there clinical trials for diet, healthy?
- Yes. Clin2 currently lists 99 recruiting diet, healthy 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, healthy 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, healthy 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.