Under $500 Paid Clinical Trials
581 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 141–160 of 581 studies
Recruiting
Not Applicable
Predictive Diagnosis of Ulcero-Necrotizing EnteroColitis in Premature Babies Using an Artificial Intelligence Approach Based on Early Analysis of the Fecal Microbiota
Healthy ControlNecrotizing Enterocolitis (NEC)
University Hospital, Clermont-Ferrand1,000 enrolled5 locationsNCT06727877
Recruiting
Not Applicable
Acute Power Training Effects in Older Adults
Muscle powerOlder Adults (65 Years and Older)Healthy Older Adults+3 more
Hasselt University42 enrolled1 locationNCT07522398
Recruiting
Not Applicable
Neuromodulation and Fatigue
FatigueHealthy Aging
University of Oklahoma40 enrolled1 locationNCT05487131
Recruiting
Not Applicable
Effects of Food Intake Sequence on Substrate Utilisation and Endurance Performance
Healthy ParticipantsSubstrate MetabolismEndurance Exercise
Universidade do Porto19 enrolled1 locationNCT07503990
Recruiting
Not Applicable
Photoacoustic Imaging of the Breast in Patients With Breast Cancer and Healthy Subjects
Breast CarcinomaHealthy Subject
Roswell Park Cancer Institute400 enrolled1 locationNCT03897270
Recruiting
Not Applicable
Kimchi and Gut Health
healthy adult participants
University of California, Davis60 enrolled2 locationsNCT07435831
Recruiting
Not Applicable
Quality of Home Packed School Lunch Among Children Attending Kindergarten School in Jimma Zone, South West Ethiopia, 2026
healthy eatingNutritional StatusFood Preference
Jimma University451 enrolled1 locationNCT07506772
Recruiting
Not Applicable
The Effect of Urolithin A (Mitopure®) Supplementation on Muscle Strength in Healthy Middle-Aged Adults
Muscle FunctionHealthy Aging
Amazentis SA120 enrolled1 locationNCT07231783
Recruiting
Not Applicable
Combining Motor Imagery and Tendon Vibration on the Effectiveness of Motor Imagery
Healthy Volunteer
Centre Hospitalier Universitaire de Saint Etienne33 enrolled1 locationNCT06845176
Recruiting
Not Applicable
Less is Better? Effectiveness of a Short Local Vibration Protocol on Neuromuscular Function
Healthy Volonteers
Centre Hospitalier Universitaire de Saint Etienne72 enrolled1 locationNCT07344298
Recruiting
Not Applicable
Relationship Between Modality-specific Dual-task Performance and Immersive Exergaming Outcomes in Healthy Athletes
Healthy Athlete
Zurich University of Applied Sciences60 enrolled1 locationNCT07461025
Recruiting
Not Applicable
The Effect of Short-term Supplementation of OliPhenolia® on Fat Oxidation
Healthy
Anglia Ruskin University40 enrolled1 locationNCT07210099
Recruiting
Not Applicable
Comparison of Preoxygenation Techniques in Healthy Volunteers With Monitoring of End-tidal Oxygen Fraction (FeO₂) and Oxygen Reserve Index (ORI)
Healthy
Centre Hospitalier Régional d'Orléans30 enrolled1 locationNCT07334041
Recruiting
Not Applicable
Effects of Tai Chi and Yoga on Flexibility, Anxiety, and Sleep Quality in Women
Healthy Lifestyle
Istanbul University - Cerrahpasa40 enrolled1 locationNCT07480174
Recruiting
Not Applicable
Human Repeat Insult Patch Test to Evaluate Skin Irritation and Sensitization in Healthy Volunteers
Healthy Adult
SerenaGroup, Inc.20 enrolled1 locationNCT07473661
Recruiting
Not Applicable
Training Models in Pelvic Floor Muscle Training
Pelvic Floor Muscle TrainingPelvic Floor Muscle ExerciseHealthy Adult Women
Izmir University of Economics60 enrolled1 locationNCT07099170
Recruiting
Not Applicable
The Effects of the Bile Acid Supplement, 7-keto Lithocholic Acid, on Human Gut Microbiota and Risk Factors for Disease.
Healthy
University of Reading40 enrolled1 locationNCT07499414
Recruiting
Not Applicable
Effects of Electroacupuncture at NP82 and SP15 on Bowel Motility in Healthy Subjects
Gastrointestinal motilityHealthy
University of Medicine and Pharmacy at Ho Chi Minh City30 enrolled1 locationNCT07496697
Recruiting
Not Applicable
VR for Hope: A Brief VR Self-help Protocol to Enhance Hope and Well-being in Young Adults
Healthy ParticipantsYoung Adults
Catholic University of the Sacred Heart40 enrolled1 locationNCT07483762
Recruiting
Not Applicable
Touching the World With a Cane: Cognitive and Neural Processes
HealthyVisual Impairment
Hospices Civils de Lyon300 enrolled1 locationNCT05199896