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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.
3481 - 3492 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
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
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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).
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Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Featured Trial
Birth Control Clinical Research Study
Recruiting
Living with obesity and looking for a birth control option that is right for you? Clinical trials are now enrolling women with a body mass index (BMI) of 30 or more in the area to help study a potential new progestin-only contraceptive patch. Participating in research studies can help advance birth control options. Don’t let financial stress hold you back. All study-related assessments, care, and study patch are available at no cost. You may also be reimbursed for study-related travel.
Conditions:
Obesity
Overweight
Overweight and Obesity
Featured Trial
Depression Clinical Trial
Recruiting
Join us in researching a potential investigational treatment for Depression. Reimbursement for study-related expenses may be available to you.
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Conditions:
Depression
Major Depressive Disorder
Depressive Disorder
Depressive Symptoms
Depressive Disorder
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
Mindful Motivation for Reducing Binge Eating
Recruiting
The aim of this study is to test how acceptable and feasible a new eating intervention is in people with overweight and binge eating. This intervention combines mindful eating with motivational interviewing to target binge eating. The main questions this clinical trial aims to answer are:
How well do participants accept the new intervention (acceptability)? Is the intervention practical and easy to implement (feasibility)?
In this trial researchers will compare the new eating intervention (mot... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
03/25/2025
Locations: University of California, San Francisco, San Francisco, California
Conditions: Binge Eating, Psychological, Health Behavior, Weight, Body
Early Feasibility Study of "HyperQureTM RDN System", Laparoscopic Renal Denervation Therapy, in Patients With Resistant Hypertension
Recruiting
HQ-HTN-G01 is a prospective, multicenter, single arm, open label, early feasibility study to evaluate initial safety and device design concept of "HyperQureTM RDN System", laparoscopic renal denervation therapy, in patients with resistant hypertension on three(3) or more antihypertensive medications
Gender:
ALL
Ages:
Between 22 years and 80 years
Trial Updated:
03/25/2025
Locations: University of California Irvine, Orange, California
Conditions: Resistant Hypertension
Feasibility and Preliminary Effects of Fasting-Mimicking Diet in Asian Americans with Prediabetes
Recruiting
This is a pilot study to determine the feasibility of studying the Fasting-Mimicking Diet (FMD), a dietary approach that involves the consumption of a specifically formulated, calorie-restricted nutrition regimen with a customized macronutrient composition, ratio, and quantity over a 5- day period, on a larger scale in Asian Americans with prediabetes and to examine the preliminary effects of the diet in study participants.
The main questions the study aims to answer are:
1. What are the recru... Read More
Gender:
ALL
Ages:
Between 30 years and 65 years
Trial Updated:
03/25/2025
Locations: UC Irvine, Irvine, California
Conditions: Prediabetes, Prediabetic State
3481 - 3492 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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