Weight loss · Illinois
Weight loss and obesity studies in Illinois
46 studies have at least one recruiting site in Illinois. Weight-management research includes trials of new medicines, devices, diets and lifestyle programs for people with overweight or obesity, and studies of weight-related conditions such as fatty liver disease.
46 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingPhase 3
Efficacy, Safety and Tolerability of Switching From Glucagon-like Peptide-1 Receptor Agonists (GLP-1RA) to Maridebart Cafraglutide in Adults With Obesity or Overweight (MARITIME-SWITCH)
Amgen
- Location
- Skokie, IL + 51 other US sites
- Eligibility basics
- Ages 18–99
- RecruitingPhase 2
Safety and Efficacy of ABBV-295 in Adults With Obesity or Overweight With Weight-Related Comorbidities
AbbVie
- Location
- Chicago, IL + 58 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 2
Study to Assess the Effect and Safety of ALV-100 on Maintenance of Weight Loss
Alveus Therapeutics, Inc.
- Location
- Champaign, IL + 19 other US sites
- Eligibility basics
- Ages 18–75
- Recruiting
Randomized Study on Transoral Outlet Reduction and Lifestyle Changes for Weight Regain After Gastric Bypass
Boston Scientific Corporation
- Location
- Chicago, IL + 8 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Clinical Study to Evaluate the Effects of Enicepatide (RO7795068) in Participants With Obesity or Overweight Without Type 2 Diabetes
Hoffmann-La Roche
- Location
- Gurnee, IL + 43 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Clinical Study to Evaluate the Effects of Enicepatide (RO7795068) in Participants With Obesity or Overweight and Type 2 Diabetes
Hoffmann-La Roche
- Location
- Springfield, IL + 44 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Learn About the Study Medicine Called Berobenatide (PF-08653944) in People With Overweight or Obesity
Pfizer
- Location
- Chicago, IL + 29 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Master Protocol to Investigate Efficacy and Safety of Elecoglipron in Participants With Obesity or Overweight With or Without T2DM
AstraZeneca
- Location
- Melrose Park, IL + 43 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
Study of Olatorepatide in Adult Participants Living With Overweight or Obesity Without Diabetes
Regeneron Pharmaceuticals
- Location
- Chicago, IL + 20 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Evaluating the Impact of Maridebart Cafraglutide on Cardiovascular Outcomes in Participants With Atherosclerotic Cardiovascular Disease and Overweight or Obesity
Amgen
- Location
- Arlington Heights, IL + 136 other US sites
- Eligibility basics
- Ages 45–99
- RecruitingPhase 3
A Study of Eloralintide (LY3841136) in Participants With Obesity or Overweight, and Type 2 Diabetes
Eli Lilly and Company
- Location
- Skokie, IL + 59 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Efficacy and Safety of Eloralintide (LY3841136) in Participants With Osteoarthritis Knee Pain and Obesity or Overweight
Eli Lilly and Company
- Location
- Chicago, IL + 37 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
A Study to Investigate Weight Management With Macupatide and Eloralintide, Alone or in Combination, in Adult Participants With Obesity or Overweight
Eli Lilly and Company
- Location
- Chicago, IL + 39 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 3
A Study of Orforglipron in Participants With Overweight at Risk of Development of Obesity-Related Complications or Progression to Class 1 Obesity
Eli Lilly and Company
- Location
- Chicago, IL + 68 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
A Master Protocol Study (LY900038) of Multiple Intervention-Specific-Appendices (ISAs) in Adult Participants With Obesity or Overweight
Eli Lilly and Company
- Location
- Chicago, IL + 42 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 3
Mirikizumab Administered at the Same Time as Tirzepatide in Adult Participants With Moderately to Severely Active Ulcerative Colitis and Obesity or Overweight: Phase 3b Study
Eli Lilly and Company
- Location
- Chicago, IL + 36 other US sites
- Eligibility basics
- Ages 18–70
- RecruitingPhase 3
Mirikizumab and Tirzepatide Administered in Adult Participants With Moderately to Severely Active Crohn's Disease and Obesity or Overweight
Eli Lilly and Company
- Location
- Chicago, IL + 34 other US sites
- Eligibility basics
- Ages 18–70
- RecruitingPhase 3
AMAZE 4: A Research Study Investigating How Well the Medicine NNC0487-0111 Helps People With Excess Body Weight and Obstructive Sleep Apnoea Treated With Positive Airway Pressure Lose Weight and Improve Sleep Apnoea
Novo Nordisk A/S
- Location
- Chicago, IL + 18 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Extension Trial to Evaluate the Long-term Efficacy, Safety, and Tolerability of Maridebart Cafraglutide (MARITIME-2-EXTENSION)
Amgen
- Location
- Skokie, IL + 30 other US sites
- Eligibility basics
- Ages 18–99
- RecruitingPhase 3
Extension Trial to Evaluate the Long-term Efficacy, Safety, and Tolerability of Maridebart Cafraglutide (MARITIME-1-EXTENSION)
Amgen
- Location
- Chicago, IL + 69 other US sites
- Eligibility basics
- Ages 18–99
- RecruitingPhase 3
A Research Study Investigating How Well the Medicine Zenagamtide Helps People With Excess Body Weight Lose Weight Compared to Semaglutide
Novo Nordisk A/S
- Location
- Skokie, IL + 32 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
AMAZE 9: A Research Study Investigating How Well Zenagamtide Tablets Help People With Excess Body Weight Lose Weight
Novo Nordisk A/S
- Location
- Chicago, IL + 38 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
AMAZE 1: A Research Study Investigating How Well the Medicine NNC0487-0111 Helps People With Excess Body Weight Lose Weight
Novo Nordisk A/S
- Location
- Skokie, IL + 21 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study of Eloralintide (LY3841136) in Participants With Persistent Obesity Who Are Treated With a Weekly Incretin
Eli Lilly and Company
- Location
- Chicago, IL + 55 other US sites
- Eligibility basics
- Ages 18+
Who these studies look for
Most of these studies set a BMI range and may exclude people taking certain weight-loss medicines or who have had bariatric surgery. Some require a weight-related condition such as type 2 diabetes or high blood pressure.
Matching a page like this one never means you qualify. Each research team decides eligibility at screening.
Questions
Can I join a weight loss study if I already take a GLP-1 medicine?
It depends on the study. Many exclude people currently or recently on weight-loss medicines; others are designed specifically for them. The listing’s eligibility criteria and the study team are the only reliable answer.