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California Paid Clinical Trials
A listing of 5602 clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
3493 - 3504 of 5602
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California is currently home to 5602 active clinical trials, seeking participants for engagement in research studies. These trials take place at a variety of cities in the state, including Los Angeles, San Francisco, San Diego and Sacramento. Whether you're a healthy volunteer interested in paid medical research or someone seeking trials related to a specific condition, the state offers a diverse array of opportunities in your vicinity.
Featured Trial
Healthy Participants Needed (Colonoscopy + Cancer Screening)
Recruiting
Earn $325 - $475 in electronic payment card compensation for your time and effort by participating in a clinical study to develop a blood test that may one day help screen for colon cancer. Take a quick quiz to see if you qualify.
Conditions:
Healthy
Healthy Volunteers
Healthy Subjects
Healthy Volunteer
Healthy Participants
Featured Trial
Paid Clinical Studies Nationwide
Recruiting
Nationwide clinical trials offered in your area. Some trials offering up to several thousand dollars in compensation for participation.
Conditions:
Healthy
Healthy Volunteer Study
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Semaglutide and Tirzepatide are advanced GLP-1 medications designed to support weight management and metabolic health. They work by targeting GLP-1 receptors in the body, helping regulate appetite, improve blood sugar control, and support sustainable weight loss (up to 22% of body weight).
Get $50 off your first order using promo code: policy-lab-50
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Featured Trial
Buy Retatrutide Online Through Celia
Recruiting
Retatrutide (formerly M25) is an investigational peptide being studied for its potential in supporting weight management and metabolic health. It acts on GLP-1, GIP, and glucagon receptors to influence appetite, energy regulation, and fat metabolism.
Conditions:
Healthy
Featured Trial
COVID-19 Vaccine Clinical Trial (Compensation Provided)
Recruiting
Healthy adults ages 50-64 may qualify. You may be eligible if you haven’t received a COVID-19 vaccine and haven’t had COVID-19 in the last 90 days.
Qualified participants may receive compensation for time and travel.
Qualified participants may receive compensation for time and travel.
Conditions:
Healthy
Effects of Snack Types on Acute Glucose and Insulin Response
Recruiting
The purpose of the present study was to determine the effects of different type of snack consumption on postprandial satiety, glucose, insulin, antioxidant capacity and anxiety in healthy subjects.
Gender:
ALL
Ages:
Between 18 years and 55 years
Trial Updated:
03/26/2025
Locations: School of Exercise and Nutritional Sciences, SDSU, San Diego, California
Conditions: Satiety
Regional Blocks for Lateral Condyle Fractures
Recruiting
The purpose of this study is to investigate the post-operative pain control in pediatric patients with closed lateral condyle fractures who undergo open reduction and percutaneous pinning. Patients will be randomized into one of two groups. Group 1 will receive an infraclavicular nerve block to the affected extremity by a fellowship trained pediatric anesthesiologist prior to surgery. Group 2 will undergo the Orthopaedic Institute of Children's (OIC) standard preoperative protocol. Post-operativ... Read More
Gender:
ALL
Ages:
Between 4 years and 12 years
Trial Updated:
03/26/2025
Locations: Orthopaedic Institute for Children, Los Angeles, California
Conditions: Fractures, Closed, Humeral Fractures, Pain
Supracondylar Post-Operative Pain Study
Recruiting
The purpose of this study to investigate post-operative pain control in pediatric patients with closed supracondylar humerus fracture who undergo closed reduction and percutaneous pinning. Currently, it is standard of care that patients receive a narcotic prescription for post-operative pain control. All patients will initially be seen in our pediatric urgent care and recruited at the time of surgery. Patients will be randomized to receiving acetaminophen and ibuprofen or acetaminophen and oxyco... Read More
Gender:
ALL
Ages:
Between 5 years and 12 years
Trial Updated:
03/26/2025
Locations: Orthopaedic Institute for Children, Los Angeles, California
Conditions: Supracondylar Humerus Fracture
TAP Blocks With Ropivacaine Continuous Infusion Catheters vs Single Dose Liposomal Bupivicaine After Kidney Transplant
Recruiting
This study is a comparison of the analgesic efficacy of transversus abdominis plane (TAP) blocks with ropivacaine bolus plus continuous ropivacaine infusion via catheters versus single shot TAP blocks with liposomal bupivacaine.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/26/2025
Locations: University of California Davis, Sacramento, California
Conditions: Transplant;Failure,Kidney, Pain, Postoperative
Effects of Fresh Watermelon Consumption on Satiety and Cardiometabolic Health
Recruiting
The goal of the proposed study is to determine the effects of fresh watermelon fruit consumption on satiety, metabolic parameters and weight management.
Gender:
ALL
Ages:
Between 18 years and 55 years
Trial Updated:
03/26/2025
Locations: Exercise and Nutritional Sciences, SDSU, San Diego, California
Conditions: Satiety
Effects of Watermelon Juice on Heart Rate Recovery and Post-exercise Muscle Soreness
Recruiting
The purpose of this study was to determine the effects of a pre-exercise, single practical dose of watermelon juice, Gatorade, sugar water or water on heart rate recovery, blood lactate levels, and 24-hour post exercise muscle soreness.
Gender:
ALL
Ages:
Between 21 years and 50 years
Trial Updated:
03/26/2025
Locations: Exercise and Nutritional Sciences, SDSU, San Diego, California
Conditions: Heart Rate Recovery
Effects of Mixed Nut Consumption on Satiety and Weight Management
Recruiting
The first goal of the proposed study is to determine acute and long-term effects of mixed nuts (almonds, hazelnuts, pecans, pistachios, walnuts, and peanuts) on metabolic parameters and weight management. While numerous studies have shown the beneficial effects of nuts on promoting negative energy balance and weight loss, mechanistic studies exploring how the inclusion of nuts in the diet promotes a negative energy balance and weight loss have not been conducted. The second goal is to determine... Read More
Gender:
ALL
Ages:
Between 18 years and 55 years
Trial Updated:
03/26/2025
Locations: School of Exercise and Nutritional Sciences, SDSU, San Diego, California
Conditions: Satiety
Bio-Repository of High Risk Cohorts for the Early Detection of Pancreas Cancer
Recruiting
Bio-repository to collect bio-specimens from patients with 1) pancreatic cysts and 2) patients at high risk, defined by family history and/or genetic mutations, for pancreatic cancer.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/26/2025
Locations: Stanford University, Stanford, California
Conditions: Pancreatic Cyst, Pancreas Disease
Microbiome Sampling During Endurance Exercise
Recruiting
The small intestine and feces of subjects undergoing endurance exercise will be sampled to examine their microbiome composition
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
03/25/2025
Locations: Stanford University, Stanford, California
Conditions: Healthy, Exercise-Induced Lactic Acidemia
Mechanistic and Clinical Outcomes of a Surgical Innovation Aimed at Minimizing GERD Associated With VSG (INNOVATE-VSG)
Recruiting
This is a two-site randomized clinical trial aiming to test whether a modified investigational bariatric surgical procedure can improve gastroesophageal reflux disease (GERD) after sleeve gastrectomy.
Gender:
ALL
Ages:
Between 18 years and 60 years
Trial Updated:
03/25/2025
Locations: University of California, Irvine, Orange, California
Conditions: Obesity, Bariatric Surgery, Sleeve Gastrectomy, Gastroesophageal Reflux Disease
Adjuvant Sacituzumab Govitecan and Nivolumab in Muscle-Invasive Urothelial Carcinoma At High-Risk Recurrence
Recruiting
This is a phase 2 study, single-arm study of adjuvant combination therapy with Sacituzumab Govitecan and Nivolumab in patients with muscle-invasive urothelial carcinoma of the bladder, ureter, or upper tract, who are high risk for cancer recurrence post curative-intent surgery based on surgical pathology.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/25/2025
Locations: Chao Family Comprehensive Cancer Center, University of California, Irvine, Orange, California
Conditions: Urothelial Carcinoma, Muscle-invasive Bladder Cancer
Ketogenic Diet and Brain Response in Anorexia Nervosa
Recruiting
This is a longitudinal study with an open design in weight recovered anorexia nervosa (wrAN) individuals. Healthy controls (HC) will also be assessed. Study participants will be carefully assessed and will have 18F-fluorodeoxyglucose (\[18F\]FDG) positron emission tomography (PET) scans for assessment of regional brain glucose uptake. The wrAN group will be compared to healthy controls. Participants in the wrAN group will then complete 14 weeks of therapeutic ketogenic diet (TKD). At the end of... Read More
Gender:
ALL
Ages:
Between 18 years and 45 years
Trial Updated:
03/25/2025
Locations: University of California San Diego, San Diego, California
Conditions: Anorexia Nervosa
3493 - 3504 of 5602
Kaiser Permanente houses over 6,000 physicians in southern California and it is also one of the largest research centers on the state. On its clinical trial division, Kaiser Permanente conducts clinical trials of almost every specialty funded by pharmaceutical companies, government, and foundations.
The Cedars-Sinai Medical Center located in Los Angeles is one of the largest research centers owned and operated by a private hospital in the United States. Focusing on biomedical, cancer, and heart research among other specialties, you can find almost any type of clinical trials for both health and non-healthy volunteers at the research division of Cedar-Sinai Medical Center.
There are around 100,000 clinical trials happening every year across the United States about almost every condition out there. While most clinical trials are testing drugs or medical devices there are also many behavioral and observational trials going on at any point in time. Many paid research studies are held at these California locations.
Clinical trials are incredibly important for making new medical and scientific discoveries, finding new and better methods for diagnosing medical conditions early, testing new interventions, and even developing safer and more effective surgical procedures.
In order for all these discoveries to me made available to the general population they need to go through years of rigorous testing both in healthy and non-healthy volunteers. During those years, medical professionals follow a protocol that has been previously approved by the FDA or other regulatory agency to test the effectiveness and safety of their discovery.
Other people choose to participate in a clinical trial because they feel it is a good way to contribute to the advancement of medical knowledge and that their participation can help many people in the future. The following lists of trials are broken down by condition, and to find a specific clinical trial in your area click through to clinicaltrials.gov.
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