HEALTHY ADULT PARTICIPANTS

This study tests whether a daily apple extract called AppleX™, rich in the compound fisetin, can lower inflammation and improve vitality in adults aged 45 to 70 who have signs of low-grade inflammation. Participants take either the extract or a placebo for 24 weeks. Researchers m…

This study compares a yeast-based protein supplement to whey protein (from milk) to see if it can help build muscle just as well. Seventy-two healthy adults aged 18-35 who already do resistance training will take either yeast or whey protein for 16 weeks while continuing their wo…

This early-phase trial tests a new radioactive tracer called [11C]MODAG-005 that binds to abnormal protein clumps in the brain linked to Parkinson's disease and multiple system atrophy. Nine participants (patients with Parkinson's, MSA, and healthy volunteers) will receive the tr…

This study checks if a simpler way to collect blood samples works as well as the standard method for the HepQuant DuO liver test. The test involves drinking a natural substance and taking blood samples 20 and 60 minutes later. Researchers will compare different blood collection t…

This study investigates whether natural gut hormones—GIP, GLP-2, and amylin—can change how much blood flows to the bones. Fifteen healthy adults aged 25 to 50 will receive infusions of each hormone separately, and a placebo, while researchers measure bone blood flow using advance…

This study will use MRI scans to measure the liver, pancreas, and kidneys of 50 healthy adults in Mexico. The goal is to create reference ranges for organ fat, inflammation, and size that are specific to different ethnic groups. This is an observational study, meaning no treatmen…

This early-phase trial will test the safety and how the body processes a new drug called NS-079 in 78 healthy adults aged 18 to 55. Participants will receive either NS-079 or a placebo, and some will also take paroxetine to check for drug interactions. The study aims to gather ba…

This early-stage trial tests the safety and tolerability of GR2301, an antibody that targets IL15, in 36 healthy adults in China. Participants receive multiple rising doses to see how the drug moves through the body and whether it triggers an immune response. The goal is to gathe…

This study looks at how alcohol affects thinking skills and brain activity in healthy adults aged 65 to 80 who drink regularly. Over two lab visits, 80 participants will complete questionnaires and mental tasks while receiving either an alcoholic or a placebo drink. The goal is t…

This study aims to create a central bank of stool donors to help treat diseases linked to gut bacteria. Researchers will screen healthy adults aged 18-80 living near Stanford to find eligible donors and study their microbiome, immune system, and diet. The goal is to better unders…

This observational study looks at how intense rowing exercise changes the body at a molecular and physiological level in 30 elite young rowers. Participants will perform two different rowing tests, and researchers will measure blood markers, gene activity, and other indicators be…

This study tests whether a single guided, non-drug spiritual session can produce mystical-type experiences in healthy Christian adults. 120 participants will complete the session and then be randomly assigned to a Christian-based or control integration program for 4 weeks. Resear…

This study tests whether a daily milk powder containing probiotics and prebiotics can change the gut bacteria of healthy adults aged 40 to 65. About 100 participants in Singapore will drink the powder twice a day for at least 28 days. Researchers will compare stool samples, blood…

This study looks at how making the abdominal muscles tired affects hip muscle strength and balance in healthy adults. Seventy male college students will have their core muscles fatigued using a special machine, then their hip strength and balance will be tested. The goal is to un…

This early-stage study tests whether KHN707 tablets are safe and how the body processes them. About 38 healthy Chinese adults aged 18-45 will receive either the drug or a placebo. The goal is to check for side effects and measure drug levels in the blood, not to treat any disease…

This study aims to translate and test a questionnaire called the Breathing Vigilance Questionnaire (BVQ) into Turkish. The BVQ measures how aware people are of their own breathing, which can help researchers understand and treat breathing problems. The study will involve 60 healt…

This study aims to see if two versions of a drug, DA-5230 and DA-5230-R, are absorbed and processed by the body in the same way. It involves 60 healthy adults aged 19 to 55 who will receive a single dose of each version on separate days. The results will help determine if the two…

This study compares a low-carbohydrate diet to a balanced diet in 135 healthy adults over 4 weeks. Researchers want to see which diet leads to more weight loss and better heart health markers like blood pressure. Participants will follow their assigned meal plan and have check-up…

This study looks at how a week of Prozac (fluoxetine) changes decision-making and social thinking in 80 healthy people aged 18-24. Participants take either Prozac or a placebo, then complete tasks on emotion recognition, reward learning, and social exclusion. The goal is to bette…

This early-stage study tests the safety of a new drug called EDG-7500 in 24 healthy adults, both Japanese and Caucasian. Participants receive single or multiple doses, and researchers measure how the drug moves through the body. No treatment benefit is expected; the goal is to ga…

This study looks at whether different types of exercise—like high-intensity workouts and Tai Chi—can improve thinking skills and lower stress in first-year university students. About 120 healthy students aged 18-25 will take part in a 12-week program. Researchers will compare the…

This study looks at how different ways of being active—like short frequent breaks or longer exercise sessions—can help reduce the negative health effects of sitting too much. Researchers will compare these activity patterns in 48 healthy but sedentary adults aged 40-70. The goal …

This study looks at whether a single dose of a supplement called Alpha-GPC can improve leg strength, power, and muscle activation in healthy, college-aged men who exercise regularly. Twenty participants will take the supplement and then perform tests like leg presses and jumps. T…

This study looks at how tartaric acid, a natural compound in wine, grapes, and grape juice, is absorbed and processed by the body. Thirty healthy, non-smoking adults aged 20-40 will consume each food source separately, then provide blood and urine samples over 24 hours. The goal …

This study will test how easy and reliable a new wearable patch (eWave) is for monitoring heart activity in everyday life. About 500 healthy adults will wear the patch for up to 7 days and use a smartphone app. The goal is to see how long the patch stays on and if any skin proble…