Fiber gummies: a tasty new weapon against obesity?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adults aged 18 to 70 years. * Body mass index (BMI) between 25 and 39.9 kg/m² (overweight or obesity class I-II). * Stable body weight (no change greater than 3%) in the 3 months before joining the study. * Usually eat at least 2 meals per day. * Able and willing to follow the study procedures for 24 weeks, attend all scheduled visits, and complete the required records. * Willing and able to sign the informed consent form. Exclusion Criteria: * Type 2 diabetes with glycated hemoglobin (HbA1c) greater than 7%, type 1 diabetes, or type 2 diabetes treated with multiple daily insulin injections. * Treatment with sodium-glucose co-transporter-2 (SGLT2) inhibitors for diabetes, heart failure, or chronic kidney disease. * Uncontrolled thyroid disease \[thyroid-stimulating hormone (TSH) outside the normal range\] or recent changes in thyroid medication in the last 3 months. * Significant gastrointestinal disease (such as severe irritable bowel syndrome, Crohn's disease, or ulcerative colitis). * History of bariatric surgery. * Liver cirrhosis. * Advanced chronic kidney disease (stage IV-V). * Following a very low-calorie diet (less than 800 kcal/day). * Alcohol dependence or heavy alcohol use that, in the investigator's opinion, could affect the study. * Current or recent eating disorder. * Planning to start or recently started a specific weight-loss diet different from the one recommended by the study endocrinology service. * Currently taking or having taken in the last 3 months medicines that affect appetite or body weight (such as anorectic drugs, GLP-1 receptor agonists, chronic corticosteroids, antipsychotics, or fiber supplements). * Pregnancy or breastfeeding. * Women of childbearing potential who are trying to become pregnant or plan to become pregnant during the study. * Known allergy or intolerance to any ingredient of the study gummies. * History of severe gastrointestinal problems with fermentable fibers.