Collagen Supplements After Sleeve Gastrectomy
Official title: Relationship Between Collagen-Containing Supplement Use and Muscle Mass and Body Image Following Metabolic and Bariatric Surgery: A Prospective Observational Study
Run by Mudanya University · NCT07809152 · Data updated 2026-11-12
This observational study looks to see if taking collagen-containing supplements after sleeve gastrectomy affects muscle mass, body composition, and body image in adults who had bariatric surgery.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 52 (estimated) |
| Sponsor | Mudanya University Academic / other |
| Locations | 1 site (Bursa, Yıldırım) |
| Status | Recruiting |
| Started | July 1, 2026 |
| Main results expected | January 10, 2027 |
| Study ends | February 10, 2027 |
| Registry record updated | September 9, 2026 |
| Trial ID | NCT07809152 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults aged 18-65 who have undergone sleeve gastrectomy and meet current ASMBS/IFSO eligibility criteria for metabolic and bariatric surgery, and who are under regular postoperative follow-up.
✕Probably not a fit
Patients who do not use collagen supplements or who do not experience changes in muscle mass or body composition may not see a benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This prospective cohort follows adults aged 18-65 who had sleeve gastrectomy and meet standard bariatric criteria. Participants are grouped by their own choice to take collagen-containing supplements or not, with no intervention by the researchers. Data are collected at baseline and at 2 weeks, 1 month, 3 months, and 6 months postoperatively as part of routine care. The study aims to observe associations between collagen use and changes in muscle mass and body composition, within a private hospital setting in Bursa, Türkiye. Analyses will account for baseline characteristics and follow-up outcomes within a real-world clinical context.
Why it matters
Potential benefit: If collagen use is linked to better muscle mass and body composition, patients may see improvements in physical well-being post-surgery.
How similar studies have gone: Prior observational work in nutritional supplementation after bariatric procedures has reported mixed results; this study adds real-world data from a Turkish clinical setting.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Patients with a BMI ≥ 35 kg/m², regardless of the presence of comorbidities * Patients with a BMI of 30-34.9 kg/m² who have an obesity-related metabolic disease and are considered eligible for surgical treatment * Patients who have undergone metabolic and bariatric surgery (MBS) in accordance with current ASMBS/IFSO guidelines (Eisenberg et al., 2022) * Patients under regular postoperative follow-up * Age 18-65 years Exclusion Criteria: * Inflammatory bowel disease * History of upper gastrointestinal bleeding * Severe psychiatric disorders * Active cancer diagnosis * Pregnancy or breastfeeding * Alcohol or substance dependence * Physical limitations preventing participation in exercise
Where it's running
-
Yıldırım Doruk Hastanesi
Bursa, Yıldırım, Turkey (Türkiye) Recruiting
Study contacts
- Study coordinator: Seher Şen, Assistant Professor
- Email: seherdalli@gmail.com
- Phone: +905393919700
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
Dramatherapy Added to Physical Activity for Obesity Care
This trial tests whether adding dramatherapy to a standard adapted physical activity program helps adults with obesity in bariatric or medical care improve psychosocial well‑being and weight-related outcomes.
-
Time-restricted eating after bariatric surgery
This study tests whether a 16:8 eating window helps adults with obesity, including those who have had bariatric surgery, see weight or metabolic improvements.
-
Scalp hair chemical changes in people with severe obesity and after bariatric surgery
This project will see if chemicals trapped in scalp hair change with body weight and can signal hair thinning or muscle loss in adults having bariatric surgery.
-
Digestion and gut function after bariatric surgery
This project will test how digestion — including enzymes, bile acids, pH, and transit time — works in adults with obesity and in people at least one year after Roux‑en‑Y or sleeve gastrectomy by collecting intestinal samples and using a swallowable sensor capsule.
-
Investigating the long-term health effects of obesity treatments on women
This study is trying to see how different obesity treatments affect women's health over time, including their nutrition, bones, muscles, and pregnancy outcomes.
-
How incretin treatments affect muscle mass and function in people with overweight or obesity
This study will see how drugs like semaglutide and tirzepatide influence fat-free mass, muscle strength, and physical function in adults with overweight or obesity.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.