Under $500 Paid Clinical Trials
580 studies
Dietary, survey, and observational studies typically compensate under $500 per participant.
Compensation amounts shown are typical ranges for this study type — not guaranteed amounts. Actual compensation is set by each study sponsor and documented in the informed consent form. ClinicalTrials.gov does not include a structured compensation field.
Showing 21–40 of 580 studies
Recruiting
Not Applicable
Nitrate, Exercise and Vascular Function in Midlife Women
MenopauseHypertensionHealthy+1 more
University of Vienna54 enrolled1 locationNCT06527248
Recruiting
Not Applicable
Evaluation of Adding Nitrate Into Foods for Regulating Nitric Oxide Bioavailability in Healthy Individuals
Healthy VolunteersVascular FunctionNitric Oxide
Queen Mary University of London30 enrolled1 locationNCT07172425
Recruiting
Not Applicable
Satiety Evaluation of Mature Okra Flour-incorporated Biscuit
Healthy Young AdultsAppetite regulation
Universiti Putra Malaysia30 enrolled1 locationNCT07631663
Recruiting
Not Applicable
Exploring the Role of taVNS in Nausea Management
healthy adult participants
Daniel Keszthelyi35 enrolled1 locationNCT07632456
Recruiting
Not Applicable
The Effect of taVNS and Upper GI Motility
healthy adult participants
Daniel Keszthelyi12 enrolled1 locationNCT07632378
Recruiting
Not Applicable
Modulation of Appetite Signaling Through Enterohormone Stimulation by DNF-10
Healthy Adult
Fytexia50 enrolled1 locationNCT07621393
Recruiting
Not Applicable
The Extraordinary Endurance of the Human Species
Healthy Volunteers
Centre Hospitalier Universitaire de Saint Etienne40 enrolled1 locationNCT07626593
Recruiting
Not Applicable
Effects of Exercise Timing on Sleep Quality
Healthy Endurance AthletInactive People
Centre Hospitalier Universitaire de Saint Etienne42 enrolled1 locationNCT07322276
Recruiting
Not Applicable
The Effect of Low or High Dietary Fiber Diet on Volatile Organic Compounds in Exhaled Breath of Healthy Individuals
Healthy AdultsDietary Fiber Fermentation
Örebro University, Sweden20 enrolled1 locationNCT07594600
Recruiting
Not Applicable
Exploration of Potential Biomarkers of Polyphenol Intake From Artichoke By-product Supplements
healthy adult participantsADMEPolyphenols Absorption Profile+1 more
Iziar Amaia Ludwig Sanz Orrio16 enrolled1 locationNCT07615673
Recruiting
Not Applicable
Effect of Smoking and Time of Day on Eosinophils
Healthy
Marek Lommatzsch20 enrolled1 locationNCT07625111
Recruiting
Not Applicable
A New Generation of Magnetoencephalographs for High Speed Functional Brain Imaging
Healthy VolunteersMild Concussion
Hospices Civils de Lyon80 enrolled2 locationsNCT06244472
Recruiting
Not Applicable
Assessing the Influence of Habitual Beef Intake on Key Molecular Markers of Brain Health
Cardiometabolic healthHealthy AgingBrain Health+2 more
South Dakota State University20 enrolled1 locationNCT07623785
Recruiting
Not Applicable
Endogenous Oxalate Synthesis in Idiopathic Calcium Oxalate Kidney Stone Disease
HealthyHealthy VolunteerKidney Stones+6 more
University of Alabama at Birmingham80 enrolled2 locationsNCT06989320
Recruiting
Not Applicable
Gut Oxalate Absorption in Calcium Oxalate Stone Disease
HealthyNephrolithiasisKidney Stone+6 more
University of Alabama at Birmingham80 enrolled2 locationsNCT06331546
Recruiting
Not Applicable
The Effect of Synaquell™ in Contact Sport Athletes
Healthy
Mayo Clinic40 enrolled1 locationNCT06104670
Recruiting
Not Applicable
tFUS Induced Transient Scotoma for Individual Dosing
Healthy
Medical University of South Carolina30 enrolled1 locationNCT06426498
Recruiting
Not Applicable
Human Skin Safety Testing of 1 Mitopure Topical Product Using a Clinical Safety in Use Study in Healthy Volunteers
Healthy Adult
Amazentis SA30 enrolled1 locationNCT07517900
Recruiting
Not Applicable
Systems Science Approaches to Improve Access to Healthier Foods: The FRESH Trial
Healthy Eating Index
Johns Hopkins Bloomberg School of Public Health756 enrolled1 locationNCT05869149
Recruiting
Not Applicable
Does Abnormal Insulin Action in the Brain Underlie Cognitive and Metabolic Dysfunction in Schizophrenia
HealthySchizophrenia
Centre for Addiction and Mental Health20 enrolled1 locationNCT05748990