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73 Weight Gain Trials

Power is an online platform that helps thousands of Weight Gain patients discover FDA-reviewed trials every day. Every trial we feature meets safety and ethical standards, giving patients an easy way to discover promising new treatments in the research stage.

To compare changes in body mass index (BMI) Z-score following treatment with OLZ/SAM vs olanzapine
No Placebo Group
Pivotal Trial
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 3
Age:10 - 17
Sex:All
220 Participants Needed
The goal of this clinical trial is to test a responsive parenting obesity prevention program with infants and caregivers of color (e.g., non-White; Hispanic/Latinx) and/or who are economically marginalized (i.e., publicly insured), delivered via Integrated Behavioral Health (IBH) in pediatric primary care. The main questions it aims to answer are: * 1) Is the obesity prevention intervention delivered via IBH in pediatric primary care feasible and acceptable to families of color and/or families who are economically marginalized? * 2) Will it prevent rapid weight gain during infancy? Participants will complete baseline (newborn), post-treatment (9 months), and follow-up assessments (12 months). Participants assigned to treatment will receive 4 prevention sessions as part of their typical well-child visit in pediatric primary care. Researchers hypothesize that infants in the obesity prevention intervention will have stable weight gain compared to infants in the control group (treatment as usual) will experience more rapid weight gain.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 2
Age:1 - 30
Sex:All
144 Participants Needed
The goal of this clinical trial is to compare two variations of the same procedure used to assist with weight loss in patients who have a history of Roux-en-Y gastric bypass who have experienced weight regain. The procedure being studied is called the Transoral Outlet Reduction (TORe), and the trial will compare two different ways to complete the TORe procedure. The main question\[s\] it aims to answer are: * Which variation of the TORe procedure results in more weight loss? * Which variation of the TORe is safer? Participants who are eligible and willing to undergo the TORe procedure to assist with weight loss will have the procedure completed either one of the two ways. All other care will be exactly the same between the two groups. Researchers will compare outcomes between the two procedure variations, looking at which one results in more weight loss, is more successful, and safer.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18+
Sex:All
70 Participants Needed
This project will increase knowledge about how a simple intervention, grocery delivery, impacts weight gain and diet among low-income pregnant young women. Results can then be used to support other pregnant young women.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:14 - 26
Sex:Female
570 Participants Needed
The goal of the study is to assess how tirzepatide impacts bodyweight and cardiovascular risk factors when used in conjunction with healthy nutrition and physical activity in adolescents with obesity and multiple weight related comorbidities. The study will last approximately 76 weeks and may include up to 23 visits.
Pivotal Trial
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 3
Age:12 - 17
Sex:All
300 Participants Needed
Participants will be randomized into one of two different experimental groups: 1) Exercise group and 2) No exercise (control group). Subject participation in the study will involve a series of metabolic tests before and after participants undergo a 10% weight loss program (with or without exercise training depending on group randomization). After completing this weight loss portion of the study, participants will then be required to adhere to a high calorie diet program to regain half of the weight the participant lost - followed by the same series of metabolic tests.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 40
Sex:All
46 Participants Needed
Interventions that target excessive gestational weight gain (EGWG) with nutrition and exercise behavior change struggle with low program adherence. The investigators recently examined adherence in a randomized controlled trial to a previously established lifestyle program called the Nutrition and Exercise Lifestyle Intervention Program (NELIP) and found that those individuals with high adherence to the program were more likely to prevent EGWG. Perhaps offering participants a choice to intervention strategies may improve adherence. The current research question is: What impact does participant choice have on adherence to the introduction of nutrition and exercise components during 3 intervention strategies offered to pregnant individuals compared to no choice and does choice maintain pregnancy health outcomes? The strategies are: Group A - introducing both the nutrition and exercise components simultaneous at baseline (12-18 weeks of pregnancy) that is followed to delivery (NELIP); Group B - introducing the nutrition component first and then at 25 weeks adding the exercise component; or Group C - starting with the exercise component first, followed with introducing the nutrition component at 25 weeks. Both Groups B and C follow the full NELIP from 25 weeks to delivery (final intervention measures will occur at 34-36 weeks gestation). Follow-up will occur at birth (6-18 hours), 2, 6 and 12 months post delivery.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
120 Participants Needed
The goal of this clinical trial is to see if the enhanced HMZ 2.0 intervention with new control system/digital platform to regulate gestational weight gain (GWG) and impact maternal-infant outcomes while collecting implementation data works and can be given to other pregnant women in various settings. The question this study aims to answer are: 1. Does the new intervention manage GWG? 2. Does the new intervention have any influence on sleep and eating behaviors and infant outcomes. 3. Does the new platform and other data collected help inform how well the research and information can be used in health care settings? 144 pregnant women with overweight/obesity will be randomized to either the HMZ 2.0 intervention or attention control groups from \~8-36 weeks gestation. All participants will be asked to: 1. Weight themselves and wear an activity monitor each day over the study. 2. Complete online surveys at either a weekly or monthly level about their thoughts, attitudes, and behaviors on GWG, physical activity, eating behaviors, sleep, their anxiety, depression, and stress. 3. Attend weekly sessions with a registered dietician. The weekly sessions will differ based on intervention group. The HMZ 2.0 intervention group will receive education, create and follow goal-setting and action plans, self-monitor their behaviors, and receive feature evidence and fetal growth facts. Education, goals, and self-monitoring will focus on GWG, physical activity, eating behaviors, sleep, self-regulating behaviors and emotions, and preparing for labor/delivery and postpartum. The attention control group will receive weekly sessions on preparing for labor/delivery and benefits of behavioral pain management strategies (e.g., mindfulness-based relaxation, imagery, music, massage, deep-breathing) to help with pain after childbirth without medicine.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 45
Sex:Female
144 Participants Needed
The goal of this clinical trial is to test a precision (person-specific and context-sensitive) messaging algorithm for increasing physical activity and slowing weight gain in insufficiently-active young adults. The main questions it aims to answer are: * Does physical activity increase more when text messages are sent based on a precision rule for selecting and timing messages compared to when the same message content is selected and sent at random or not at all? * Do biological or social characteristics of young adults make them more likely to respond positively to the precision messaging intervention than either of the other two interventions? Participants will be provided with education about health-enhancing physical activity and given an activity tracker to wear for 12 months. They will then be randomly assigned to one of three groups. Participants in one group (Precision AIM) will receive up to 4 messages/day selected and timed based on a person-specific algorithm that forecasts possible message effects periodically throughout the day. Messages will be drawn from one of three content libraries: move more, sit less, or inspirational quotes. Participants in a second group (Random AIM) will receive 4 messages/day selected at random from the same three content libraries and delivered at random times within their availability window. Participants in the third group (No AIM) will receive not motivational messages but will randomly assigned to the Random AIM group will receive up to 4 messages/day drawn at random from three content libraries at randomly-selected times. Step counts and weight will be assessed at baseline, and at 3 months, 6 months, 12 months, and 18 months. Researchers will compare Precision AIM, Random AIM and No AIM groups to see if physical activity increased more and weight gain was slower in Precision AIM than Random AIM or No AIM after 3, 6, and 12 months of intervention, and 6 months after the intervention is complete (18 months).
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 29
Sex:All
360 Participants Needed
In the United States, severe obesity (body mass index (BMI) ≥ 40.0 kg/m2) affects approximately 10% of females of reproductive age with Black females disproportionately burdened (16%). Severe obesity is a significant predictor of adverse perinatal outcomes including gestational diabetes mellitus, pre-eclampsia, premature birth, and at its most severe, fetal death, birth defects and a three-fold greater risk of maternal mortality - outcomes that also disproportionately affect Black females. Observational studies suggest weight maintenance and even modest body fat loss and altering the maternal metabolic milieu (availability of glucose and lipids) in the gestational period may be important to reducing perinatal health risks among pregnant females with severe obesity. The proposed research aims to assess time-restricted eating in the 2nd and 3rd trimesters of pregnancy to explore the effects on maternal weight, and perinatal health outcomes compared to standard clinical care.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 44
Sex:Female
80 Participants Needed
Image of trial facility.

Phentermine for Obesity

Winston-Salem, North Carolina
This trial is studying the long-term effects of the weight-loss drug phentermine on people with obesity. The drug helps by making you feel less hungry and burning more calories. Researchers want to see if it is safe and effective over an extended period. Phentermine has been used in various formulations and combinations for weight loss, showing modest efficacy but with potential cardiovascular and psychiatric side effects.
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Phase 4
Age:18 - 70
Sex:All
870 Participants Needed
Image of trial facility.

NDPP-NextGen for Diabetes Risk Reduction

Winston-Salem, North Carolina
The goal of this clinical trial is to test an enhanced version of the National Diabetes Prevention Program (NDPP-NextGen) that is tailored to young women in childbearing years. The investigators will recruit 360 women aged 18-39 years with overweight/obesity who are not currently pregnant, but likely to conceive within 24 months. Women will be randomized to NDPP-NextGen or a usual care control group. The NDPP-NextGen group will participate in the adapted NDPP online group class across 12 months, and the control group will get a packet of information about how to be healthy before, during and after pregnancy. The main goals of the study are: 1. to assess effects of NDPP-NextGen on pre-pregnancy blood sugar and early pregnancy BMI 2. to assess effects of NDPP-NextGen on weight gain and behavioral outcomes during pregnancy 3. to explore effects of NDPP-NextGen on infant's percentage of fat tissue at birth All participants will complete up to 4 research visits: baseline, conception, mid-pregnancy, and delivery. These visits will include: 1. Questionnaires about health, diet, activity, smoking, self-confidence, and depression 2. Body size measurements 3. Fasted blood draws Participants will also be asked to weigh themselves weekly using home scales that are connected to the research database. At the delivery visit, investigators will measure the baby's body size and collect a cord blood sample.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 39
Sex:Female
403 Participants Needed
People with IDD (intellectual and developmental disability) have very high rates of obesity and die prematurely from cardiometabolic disease. While antipsychotics contribute to this problem, their use is necessary and appropriate in a significant subgroup of individuals with IDD. Exercise and diet interventions have limitations and may not be sufficient, requiring effective adjunctive pharmacological approaches to target obesity and related comorbidities in IDD. However, persons with IDD treated with antipsychotics are systematically excluded from clinical trials hindering development of evidence to help guide safe and effective treatment of these comorbidities. Moreover, evidence from other disorders cannot be extrapolated to IDD given inherent biological differences between disorders. This trial will address the identified gaps, which extend beyond cardiovascular morbidity and negatively impact psychosocial outcomes, in a hugely underserviced population.This is the the first RCT (randomized control trial) to examine the efficacy of metformin in overweight or obese adults with IDD who have experienced antipsychotic-induced weight gain. By generating efficacy data for a very accessible and scalable intervention, allows for guideline and implementation strategies to address a recalcitrant health problem.
Stay on current meds
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 4
Age:18 - 65
Sex:All
100 Participants Needed
Background: People with HIV take drugs to keep the amount of virus in their body low. One type of these drugs, called integrase strand transfer inhibitors (INSTIs), can cause weight gain over time. Weight gain can cause diabetes, heart disease, and other serious issues. Researchers want to understand how INSTIs cause weight changes. Objective: To see how a common INSTI, dolutegravir (DTG), affects how the body uses energy. DTG will be compared with a non-INSTI drug, tenofovir alafenamide (TAF). Eligibility: Healthy people aged 18 to 55. Design: Participants will be screened. They will have a physical exam and blood tests. They will have a nutritional assessment and tests of their heart function. Participants will have 2 inpatient stays at the clinic. Each stay will be for 11 nights, with a 3-week break between. Both DTG and TAF are gel caps swallowed once per day by mouth. Participants will take 1 drug for 8 days during each stay. Participants will have tests to see how their body uses energy: They will spend 23 continuous hours in a special room that measures how much oxygen they breathe in and how much carbon dioxide they breathe out. They will do this a total of 6 times. They will have a DEXA (dual-energy X-ray absorptiometry). DEXA is a kind of X-ray that measures body fat and bone density. They will lie on a table. Electrodes will be placed on their hands and feet to measure body fat and lean body mass. They will stand still on a platform for about 30 seconds. High-resolution laser cameras will scan their bodies.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 2
Age:18 - 55
Sex:All
120 Participants Needed
Among women with GDM, the investigators will determine if a strategy of (1) a website-based information and motivational resource bank; (2) biosensor/ePlatform-based physical activity and GWG tracking; and/or (3) a health coach will lead to more favourably outcomes; namely, GWG closer to target, higher physical activity levels, better glycemic and blood pressure control, and lower incidence of LGA in offspring. The current project is designed to assess feasibility and usability to inform the development of a large randomized controlled trial. The investigators will monitor the implementation process and examine patient-oriented outcomes, including perceptions of utility, challenges, and burden. These will be assessed through telephone-based in-depth interview. Methodology / Study design This is a feasibility randomized controlled trial with a factorial design. The investigators will recruit women with a diagnosis of GDM between 20 and less than 32 weeks' pregnancy. All will receive access to a website resource bank with tips and resources to optimize physical activity and dietary intake a quality during pregnancy. In addition, they will be randomized to one of the four following groups: (1) No additional intervention; (2) ePlatform-based automated support combined with pedometer-based physical activity monitoring and digital scale-based weight monitoring; (3) weekly telephone calls with a health coach to discuss physical activity, eating, gestational weight gain; (4) combination of ePlatform and telephone calls from a health coach. The investigators will evaluate recruitment rates, drop-out rates, women's perceptions of the strengths and limitations of the strategy, and ease and feasibility of outcome assessment. Assessments will be through in-clinic assessments, on-line questionnaires, clinic-based measures, mailed-in pedometers, and telephone-based interviews. Assessments will be at study entry and two to three weeks before the expected date of delivery or date of scheduled C-section. There will be a telephone-based interview at 12 weeks postpartum.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
227 Participants Needed
Image of trial facility.

CBT for Insomnia in Breast Cancer Survivors

Washington, District of Columbia
The investigators propose a randomized controlled clinical trial in 250 women with a history of early stage breast cancer who are overweight or obese with insomnia to test whether a brief, cognitive-behavioral intervention for insomnia (CBT-I) prior to behavioral weight loss (CBT-I+BWL) is superior to a sleep education control (EDU) condition followed by behavioral weight loss (EDU+BWL). The investigators will measure outcomes at baseline, 8 weeks (after completing CBT-I or EDU and prior to BWL), and at 3, 6, and 12 months.
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
250 Participants Needed
This trial is comparing two medicines, aripiprazole and risperidone, to see which one causes more weight gain in children with autism. The study focuses on children under 18 who have behavior problems like irritability and aggression. These medicines help by calming brain activity to improve behavior. The main goal is to find out which medicine leads to less weight gain over a few months. Aripiprazole and risperidone are both FDA-approved for treating irritability in children with autism.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 4
Age:< 17
Sex:All
350 Participants Needed
Healthy for Two, Healthy for You (H42/H4U) is an innovative evidence-based pregnancy/postpartum health coach intervention that is remotely-delivered (phone coaching using motivational interviewing, web-based platform, mobile phone behavioral tracking). The aim of this randomized controlled trial (RCT) is to embed H42/H4U into Johns Hopkins prenatal care clinics that serve a racially and economically diverse population, leveraging existing staff as trained health coaches to test its effectiveness and implementation. The investigators hypothesize that women in the H42/H4U arm will have lower gestational weight gain and lower rates of gestational diabetes, without an increase in low birth weight infants, and that implementation into the investigators' prenatal care clinics will be feasible and scalable.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
380 Participants Needed
The purpose of this study is to compare the effectiveness of H42-HV integrated into home visiting compared with usual home visiting services in reducing postpartum weight retention (difference between pre-pregnancy weight and weight at 6 months postpartum) among pregnant and postpartum people. The intervention is tailored for Black and Latinx pregnant and postpartum people and, ultimately, aims to address inequities in cardiometabolic health.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
360 Participants Needed
In this study, semaglutide will be compared to placebo (a look-alike inactive substance, a "sugar pill") to determine if its use will prevent weight gain after liver transplantation (LT). In addition, researchers will be testing to determine if semaglutide prevents the development of Non-Alcoholic Fatty Liver Disease (NAFLD) after transplant through Magnetic Resonance Imaging (MRI) and laboratory results.
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 2
Age:18 - 75
Sex:All
50 Participants Needed
The purpose of this research is to compare two healthy diet styles during pregnancy. Sixty pregnant women between 8 and 16 weeks will participate. Participates will be randomly assigned (like flipping a coin) to either receive routine healthy diet advice and counseling, or to receive advice and counseling for the Mediterranean style diet. Our current routine healthy diet program follows the recommendations provided by the American College of Obstetricians and Gynecologists (ACOG). It recommends the consumption of grains, fruits, vegetables, protein foods, and dairy foods during pregnancy. The Mediterranean diet (MedDiet) is a well-known healthy diet that consists of a large amount of plant-based foods such as fruits, vegetables, beans, and nuts with olive oil as the principal source of fat. Dairy, fish, and poultry are consumed in moderation and red meat only eaten occasionally. Throughout their pregnancy, participants will receive free food and be assessed to determine how will they are following to the diet plan they were randomized to.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
41 Participants Needed
Purpose: The investigators hypothesize that a simple, personalized, smartphone-based activity intervention using a wrist-based activity tracker will help high risk pregnant women reduce their stress during pregnancy. Participants: Pregnant women enrolled in prenatal care at the University of North Carolina who have a documented moderate or high level of perceived stress ( ≥ 14) and are at high risk for adverse pregnancy outcomes due to body mass index of ≥ 30 kg/m2 or history of gestational hypertension, preeclampsia, intrauterine growth restriction, or preterm birth \<37 weeks' in a prior pregnancy. Procedures: Women meeting inclusion criteria will be recruited through the University of North Carolina prenatal care clinics. They will be contacted for possible participation at regularly scheduled prenatal visits and/or ultrasound. They may also be contacted for possible participation by remote methods (e.g., Telehealth). Women who are enrolled will complete validated dietary, stress, sleep, and body image questionnaires. Enrolled women will then be randomized to receive standard obstetrical care or enhanced counseling. All participants will receive a wrist-based activity tracker. Maternal blood sample for biochemical markers of stress and gene expression will be obtained at the initial visit; a followup blood sample will be obtained later in pregnancy, and a small portion of the placenta saved at delivery. Maternal and neonatal outcomes will be compared between groups.
No Placebo Group
Trial Details
Trial Status:Not Yet Recruiting
Trial Phase:Unphased
Age:18 - 51
Sex:Female
250 Participants Needed
Weight gain is disproportionately high among young adults compared to other age groups and of particular concern in the military, which is comprised largely of young adults, as obesity has emerged as a threat to national security. Despite the critical need to address weight gain in young military personnel who can face discharge for failing to meet weight standards, there is currently no evidence-based programs available to them. This study aims to adapt an evidence-based weight gain prevention intervention for delivery in a young adult, active-duty military population using mobile technology to prevent weight gain over 2 years .
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 39
Sex:All
350 Participants Needed
More than 30% of Black women with obesity binge eat. Binge eating may increase the risk for the development of metabolic syndrome and binge-eating-disorder (BED), which is associated with severe obesity. Though several effective treatments for binge eating exist, Black women have not fared well. Not only has their inclusion in treatment trials been limited, but when participating, they are more likely to drop out, and/or lose less weight, compared to their White counterparts. Furthermore, treatment for binge eating is often not available in primary care and community-based settings places where Black women are more likely to receive treatment for their eating and weight-related concerns. Currently, there is scant intervention research to treat binge eating in Black women. With the highest rates of obesity (57%) nationally, Black women are in need of culturally-relevant treatments for binge eating and weight gain prevention. Given the established relationship between frequent binge eating and subsequent weight gain, addressing binge eating among Black women with obesity is imperative.
No Placebo Group
Trial Details
Trial Status:Not Yet Recruiting
Trial Phase:Unphased
Age:18 - 75
Sex:Female
60 Participants Needed
This study will use a 2 x 2 factorial design to test impact of two intervention strategies (bottle size and bottle opacity) on infant weight gain.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:3 - 1
Sex:All
76 Participants Needed
The purpose of this study is to determine the effect of an antenatal obesity treatment on gestational weight gain when integrated into Philadelphia WIC.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
416 Participants Needed
This is a single site trial in 30 patients with schizophrenia, schizoaffective, or bipolar I/II/NOS disorder in which all participants will receive eight weeks of olanzapine and samidorphan (Olz/Sam) plus four weeks of aerobic exercise.
No Placebo Group
Trial Details
Trial Status:Not Yet Recruiting
Trial Phase:Phase 4
Age:18 - 65
Sex:All
30 Participants Needed
This trial tests an online nutrition education program called PEDALL for children and teens with acute lymphoblastic leukemia (ALL) who are undergoing maintenance chemotherapy. The goal is to prevent them from becoming overweight or obese, which is a common issue during treatment. By teaching healthy eating habits and providing regular support, the program aims to help these young patients maintain a healthy weight.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:5 - 21
Sex:All
376 Participants Needed
This study is being done to test the feasibility, acceptability, and preliminary efficacy of a meal delivery intervention for managing gestational weight gain among pregnant women with overweight or obesity.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
35 Participants Needed
This study is being done to assess the feasibility and acceptability of a time-restricted eating intervention among postpartum women with overweight/obesity.
No Placebo Group
Trial Details
Trial Status:Not Yet Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
60 Participants Needed
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Frequently Asked Questions

How much do Weight Gain clinical trials pay?

Each trial will compensate patients a different amount, but $50-100 for each visit is a fairly common range for Phase 2–4 trials (Phase 1 trials often pay substantially more). Further, most trials will cover the costs of a travel to-and-from the clinic.

How do Weight Gain clinical trials work?

After a researcher reviews your profile, they may choose to invite you in to a screening appointment, where they'll determine if you meet 100% of the eligibility requirements. If you do, you'll be sorted into one of the treatment groups, and receive your study drug. For some trials, there is a chance you'll receive a placebo. Across Weight Gain trials 30% of clinical trials have a placebo. Typically, you'll be required to check-in with the clinic every month or so. The average trial length for Weight Gain is 12 months.

How do I participate in a study as a "healthy volunteer"?

Not all studies recruit healthy volunteers: usually, Phase 1 studies do. Participating as a healthy volunteer means you will go to a research facility several times over a few days or weeks to receive a dose of either the test treatment or a "placebo," which is a harmless substance that helps researchers compare results. You will have routine tests during these visits, and you'll be compensated for your time and travel, with the number of appointments and details varying by study.

What does the "phase" of a clinical trial mean?

The phase of a trial reveals what stage the drug is in to get approval for a specific condition. Phase 1 trials are the trials to collect safety data in humans. Phase 2 trials are those where the drug has some data showing safety in humans, but where further human data is needed on drug effectiveness. Phase 3 trials are in the final step before approval. The drug already has data showing both safety and effectiveness. As a general rule, Phase 3 trials are more promising than Phase 2, and Phase 2 trials are more promising than phase 1.

Do I need to be insured to participate in a Weight Gain medical study ?

Clinical trials are almost always free to participants, and so do not require insurance. The only exception here are trials focused on cancer, because only a small part of the typical treatment plan is actually experimental. For these cancer trials, participants typically need insurance to cover all the non-experimental components.