Loading clinical trials...
Find 180 clinical trials for obesity near Phoenix, Arizona. Connect with research centers in your area.
Showing 21-40 of 180 trials
NCT00523627
This study, conducted at the NIH Clinical Research Unit at the Phoenix Indian Medical Center, will examine how the body s metabolism (energy expenditure) changes when people overeat and when they fast and how different diets (e.g., high-protein or high-fat) affect metabolism. The results may provide information about whether there are mechanisms that make some people more resistant than others to gaining weight when they eat more. Non-smoking healthy subjects between 18 and 55 years of age who weigh no more than 350 pounds may be eligible for this study. Participants undergo the following procedures: * Pregnancy test for women of childbearing age. * Oral glucose tolerance test. For this test, an I.V. line (needle attached to a plastic tube) is inserted into a vein to allow several blood draws without repeated needle sticks. After the first blood sample is drawn, the subject drinks a cola-flavored sugar solution. Five additional blood samples are then drawn over 3 hours. * Blood test for DNA (genetic) studies related to obesity, diabetes and related medical problems. * DEXA scan. This test measures body fat. The subject lies on a table while a very small dose of X-rays is passed through the body. * Respiratory chamber. This test measures how many calories the body burns a day and assesses energy balance between intake and expenditure. Subjects stay in a room with two windows, equipped with a sink, toilet, television and DVD player, desk, chair, telephone and bed for 24 hours. The test is repeated five times during the first 18-day admission and 3 times during the second 13-day admission. For the first two sessions, subjects are fed a diet equal to the amount of energy their body uses. For the next 6 stays they are fed double the amount of calories their body usually uses for 5 of the stays and fast (consume nothing but water and soda without caffeine or calories) during 1 stay. The overfeeding diets may be high or low in protein, normal in protein, or high in fat. Blood tests are done on the day of each respiratory chamber session and a 24-hour urine sample is collected for one day while in the chamber. * Eating behavior questionnaires. * Psychological performance tests. Some participants are asked to volunteer to repeat two of the chamber studies to validate the measurements. The repeat session includes only the fasting and the overfeeding with normal protein content. All participants are followed at 6 months with blood tests, a DEXA scan, and urine tests (including pregnancy test for women). At annual visits for years 1 through 7, participants have the 6-month tests plus an oral glucose tolerance test.
NCT00739362
This study will determine whether electrical stimulation of an area of the brain called the dorsolateral prefrontal cortex, which is important in determining the feeling of fullness after eating, affects how much food a person eats and weight loss over 4 weeks. It will also compare weight changes in people who attend weight loss counseling sessions and those who do not over this period of time. Obese, non-diabetic people between 18 and 60 years of age who are in good health and who live in the Phoenix, AZ, metropolitan area are eligible for this study. Candidates must have a body mass index of 35 kg/m(2) or more and weigh less than 350 pounds. Participants are admitted to the NIH inpatient unit in Phoenix for the first 9 days of the study for tests, which include meal tests to determine eating behaviors and caloric intake, blood and urine tests, glucose tolerance test, weight measurement, psychological assessments and DEXA scan to measure body fat. For 3 of the days, they will be asked to eat all of their food from automated vending machines. Some subjects receive transcranial direct current stimulation (TDCS). For this procedure, electrodes that conduct electricity are placed on the head and arm and the current is turned on for 40 minutes. Some tingling may be felt under the electrodes. Other subjects receive sham TDCS, with the current turned on only very briefly. After the evaluations, subjects are discharged home from the NIH unit and instructed to eat 25 percent fewer calories than they consumed while on a weight maintenance diet the first 3 days of their inpatient stay. They maintain the lower calorie diet at home for 4 weeks. During this period they come to the NIH unit 3 days a week to receive either real or sham TDCS.
NCT06683508
The main purpose of this study, performed under the master protocol W8M-MC-CWMM (NCT06143956), is to evaluate the effects of LY3549492 in adults with obesity or overweight. Participation in the study will last about one year.
NCT00687115
This study will investigate how to better predict why some individuals gain or lose weight more easily than others. It will examine whether the increase in the amount of energy a body burns in 24 hours with overeating or the decrease over 24 hours with fasting can help determine how easily someone gains or loses weight. Healthy people between 18 and 60 years of age who have a body mass index (BMI) between 18.5 kg/m(2) and 24 kg/m(2) (for overfeeding study) or a BMI greater than 27 kg/m(2) with a body weight less than 350 pounds (weight loss study) may be eligible for this study. The study requires a 10-week admission to the NIH Clinical Center (2-week baseline, 6-week overfeeding/weight loss, 2-week post-weight change). Participants undergo the following tests and procedures during the hospital admission: * Medical history, physical examination and laboratory studies * Questionnaires to assess eating behavior, food preferences, body composition, and activity level * Body composition assessment (height, weight, waist circumference, and fat mass and muscle content through DXA and MRI scans) * Oral glucose tolerance test * Meal test to measure the response of certain hormones to food * Activity monitors to determine activity level * Metabolic chamber study to measure calories burned over 24 hours and monitor body temperature * Free-living energy use study to measure calories burned under normal home conditions over 7 days * Fat and muscle biopsies * Dietary intervention: Measurements of food intake and energy loss over a 6-week overfeeding (1.5 times the subject s normal food intake) or weight loss (one-half the subject s normal food intake) program Followup procedures after the inpatient stay: * Height and weight measurements at 6 months (overfeeding study participants) and monthly for the first year, at 3-month intervals for the second year, and then yearly for 3 more years (weight loss study participants) * Yearly visits (2-night inpatient stay) for all participants for repeat meal test, DXA, oral glucose tolerance test, behavioral questionnaires and, in women who can become pregnant, pregnancy test
NCT01812694
Background: \- LIFE-Moms (Lifestyle Interventions for Expectant Moms) is a national project that is studying pregnant women who are overweight or obese. It is looking at ways they can manage their weight gain in pregnancy and how this may affect them and their babies health at birth and through the first year. Researchers want to recruit pregnant women who are being treated at the Phoenix Indian Medical Center. They will participate in a two-part study. Objectives: \- To study pregnant women who are in the LIFE-Moms project at the Phoenix Indian Medical Center. Eligibility: * Pregnant women at least 18 years of age who are overweight or obese. * Participants must be receiving care at the Phoenix Indian Medical Center. * Participants must be having only one child in their pregnancy (no twins or other multiple births). Design: * This study will have two parts. The first part will have three visits to obtain data about health early in pregnancy. It will also let participants and researchers find out if the participants are eligible and should continue in the second part of the study. In the second part, participants will be monitored throughout their pregnancy and during the first year after the baby s birth to test the effects of a lifestyle intervention to control weight gain during pregnancy. * On the Part 1 study visits, participants will have a physical exam and medical history. They will provide blood, urine, hair, and other samples to be examined for possible genetic conditions. * For the Part 2 study visits, participants will be placed in one of two treatment groups. Each group will receive the same prenatal and postnatal care that they would get if they did not join the study. * The first group will have a lifestyle intervention program. They will spend about 2 hours every week with other members of their group to learn diet and activity behaviors that may help with their health. * The second group will have an enhanced care program. They will be given additional information about health and pregnancy and be invited to attend three classes to learn about staying healthy during pregnancy.
NCT06223555
Background: Researchers use mixed meal tolerance tests (MMTTs) to look at how people s bodies respond to eating a meal. However, researchers do not agree on how to decide the number of calories to give in each meal. Some use fixed meals, which are the same size for everyone, and some use adjusted meals, based on the size of the person s body. Researchers want to know which MMTT is best to use for future research. Objective: To learn how fixed vs adjusted meals affect blood glucose levels in healthy people. Eligibility: Healthy people aged 18 years or older. Design: Participants will have 3 or 4 clinic visits of up to 8 hours in 8 weeks. Participants will have baseline tests: Their height, weight, and waist size will be measured. They will have an oral glucose tolerance test: A needle attached to a tube (IV) will be inserted into a vein in the arm. They will have a sugary drink. Blood samples will be taken from the tube at intervals up to 3 hours after the drink. They will have a body scan. Participants will have 2 MMTT visits. One will include a fixed meal and one will include an adjusted meal. They will have tests at both visits: Resting metabolic rate: A clear hood will be placed over the participant s head while they rest for 20 minutes. This will measure the oxygen they breathe in and out. MMTT. Participants will have 5 minutes to drink a liquid meal. Blood samples will be taken at intervals for the next 4 hours....
NCT06066515
This study is open to adults who are at least 18 years old and have * a body mass index (BMI) of 30 kg/m² or more, or * a BMI of 27 kg/m² or more and at least one health problem related to their weight. People with type 2 diabetes cannot take part in this study. Only people who have previously not managed to lose weight by changing their diet can participate. The purpose of this study is to find out whether a medicine called survodutide (BI 456906) helps people living with overweight or obesity to lose weight. Participants are divided into 3 groups by chance, like drawing names from a hat. 2 groups get different doses of survodutide and 1 group gets placebo. Placebo looks like survodutide but does not contain any medicine. Every participant has a 2 in 3 chance of getting survodutide. Participants inject survodutide or placebo under their skin once a week for about one and a half years. In addition to the study medicine, all participants receive counselling to make changes to their diet and to exercise regularly. Participants are in the study for about 1 year and 7 months. During this time, it is planned that participants visit the study site up to 14 times and receive 6 phone calls by the site staff. The doctors check participants' health and take note of any unwanted effects. The participants' body weight is regularly measured. The results are compared between the groups to see whether the treatment works.
NCT06484114
Fractyl is evaluating Revita Duodenal Mucosal Resurfacing (DMR) in the REMAIN-1 pivotal study, which is designed to include two cohorts - an open label cohort referred to as REVEAL-1, and a randomized cohort, which includes both a midpoint analysis and a pivotal analysis. Patients who previously lost at least 15% of their body weight on a GLP-1 can qualify for the open label REVEAL-1 cohort. The data generated from the REVEAL-1 cohort will be used for open label reporting as the study progresses. The REMAIN-1 randomized cohort will enroll patients living with obesity and a body mass index ("BMI") between 30 and 45 kg/m2 who are not currently on a GLP-1 drug. Patients will be prescribed tirzepatide and titrated to achieve at least 15% total body weight loss, at which time tirzepatide will be discontinued and patients will be randomized to Revita versus sham at 2:1. Midpoint Analysis of Randomized Cohort: The midpoint analysis of the randomized cohort will be performed at three months of follow-up on approximately 45 patients, allowing us to assess and report on safety and efficacy signals that could be anticipated in the pivotal analysis. These patients are distinct from those included in the pivotal analysis. Pivotal Analysis of Randomized Cohort: The pivotal analysis of the randomized cohort will be performed on approximately 315 patients (distinct from those included in the midpoint analysis) and will evaluate safety and efficacy in the first co-primary endpoint, which is weight regain from the time of tirzepatide discontinuation in Revita DMR versus sham patients at six months, with a primary objective of demonstrating a benefit of Revita DMR versus sham for weight maintenance after GLP-1 discontinuation. The second co-primary endpoint evaluates a responder rate among the Revita DMR treated group at one year to demonstrate the durability of the Revita DMR procedure for weight maintenance after discontinuation of a GLP-1-based therapy. Secondary objectives will include evaluation of the effectiveness of the Revita DMR procedure on the change in blood glucose levels, cardiovascular disease ("CVD") risk factors, body composition and pre-diabetes status. All patients enrolled in the study will receive diet and lifestyle counseling.
NCT06963736
The purpose of this study is to determine the feasibility, acceptability, efficacy, and participant adherence in using home-based technologies and wearable devices and simple, practical strategies to reduce the negative impact that evening screen time may have on your health.
NCT07104383
This is a phase 3, multicenter, 78-week randomized, double-blind, placebo-controlled, parallel arm study that will evaluate the weight loss efficacy as well as safety, tolerability, pharmacodynamic effects, and pharmacokinetics of VK2735 in adults with Type 2 Diabetes who are obese or overweight
NCT07284875
The primary objective of the study is to determine the effects of KAI-9531 subcutaneous (SC) injection once weekly compared to placebo on percent change in body weight.
NCT06851858
This Phase II study is a randomized, parallel group, double blinded, placebo-controlled, multicenter to evaluate the efficacy, safety, and tolerability of AZD6234 in adults with overweight or obesity and type 2 diabetes on stable GLP-1 RA therapy.
NCT07281495
This is a multicenter, randomized, double-blind, placebo-controlled, multiple dose study to evaluate the efficacy, safety, and tolerability of taldefgrobep alfa in adults with overweight and obesity, with an open-label extension.
NCT06897202
This study is designed to test how well once-weekly MET097 (an ultra-long-acting GLP-1 receptor agonist) works to treat adults with obesity or overweight and type 2 diabetes mellitus (T2DM) compared to placebo. MET097 or placebo will be administered to individuals via subcutaneous injection once weekly for 28 weeks. If an individual is randomly assigned to MET097 they will receive one of four different dose regimens.
NCT05564117
This study will look how well semaglutide tablets taken once daily helps people with body weight above the healthy range. Participants will either get semaglutide 25 milligram (mg) once daily or placebo once daily. This study will last for 72 weeks, which includes 1-week screening period, 64 weeks of treatment period and 7 weeks of follow up period.
NCT07313761
The main objective of this trial is to evaluate the pharmacokinetics (PK) of maridebart cafraglutide administered as a single dose using two different SC presentations in participants living with overweight or obesity.
NCT07226778
NCT05567796
This study has 2 parts: First part is the main study and second part is the extension study. During the main study participants will receive 1 of 4 study medicines. If participants continue in the extension study, they will not receive any study medicine during the extension. The main study will look at how well CagriSema helps participants with excess body weight lose weight compared to a "dummy" medicine and 2 other medicines, cagrilintide and semaglutide. Participants will either get CagriSema, cagrilintide,semaglutide or "dummy" medicine. Which treatment participants get is decided by chance. They will take one injection once a week. The study medicine is injected briefly with a thin needle, typically in the stomach, thighs or upper arms. Extension study: After the main study, not all participants will continue in the extension study. The study staff will tell the participant if they will continue or not into the extension study. In the extension study we will look at what happens to the participant's body weight and diseases related to excess body weight after the participant stops taking the study medicine. The main study will last for about 1½ years and the extension study will last for another 2 years.
NCT05774665
The goal of this clinical trial is to determine the impact of omega-3 fatty acids on the production of anti-inflammatory effects and clinical improvement in people with depression who have not responded well to standard antidepressant treatment. The main questions it seeks to answer are: 1. Do omega-3 fatty acids added to ineffective antidepressant treatment increase production of compounds that reduce inflammation? 2. Is the increase in these anti-inflammatory compounds associated with a stronger antidepressant effect? Participants taking antidepressants that have not worked completely will be assigned at random for a 12-week period to one of the following: 1. an omega-3 preparation 2. an inactive placebo During the course of the study, blood tests will be obtained for compounds associated with inflammation, and questionnaires to measure clinical improvement in depressive symptoms will be administered.
NCT06662539
The main purpose of this study is to compare dose levels of petrelintide versus placebo with regards to effect on body weight, safety, and tolerability.
