Protein Needs in Men After Gastric Bypass Surgery
Studies how much protein adult men need at least 1 year after gastric bypass.
Plain-language title generated from the registry record
Registry title: Protein Requirements After Bariatric Surgery
Key facts
- Where
- Leuven, BelgiumSee the site
AI summary: who the study is looking for
From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.
The trial is looking for men who had a gastric bypass (RYGB) operation one to ten years ago. It studies how much protein they need.
- Age
- 18 to 65 years
- Sex
- Men only
- Disease stage
- Primary RYGB (gastric bypass) surgery one to ten years before joining. Weight stable within 5% over the last 3 months. Normal blood pressure, or blood pressure controlled with medicine.
- Earlier treatment
- Must have had a first (primary) RYGB operation one to ten years ago.
Main reasons for not taking part
- Current cancer, or active cancer in the past 1 year
- Any chronic or acute disease known to affect amino acid absorption, metabolism or requirements
- Weight loss after surgery of less than 40% of excess weight
- Weight regain after surgery of more than 20% of lowest weight
- Diabetes mellitus or medical treatment for diabetes
Read by machine on 9 November 2026.
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 18 and 65 years old?
Source: NCT06853652, who can take part
Where in Belgium
- Universitaire Ziekenhuizen KU LeuvenLeuven, BelgiumContact: Gabriel EksteenTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorTrial details
- Who runs it
- Universitaire Ziekenhuizen KU Leuven
- Trial code
- NCT06853652
- Record updated
- 3 March 2025
- Original description
The study investigates protein requirements at least 1 year after gastric bypass surgery in adult males, to investigate whether protein requirements are elevated compared to protein requiremens for the general populaiotn. The main study outcome is the estimated average protein requirements for the study populaiton.Read full original descriptionShow less
Maintenance-phase PROtein Requirements After RouX-en-Y-gastric Bypass Surgery
The study investigates protein requirements at least 1 year after gastric bypass surgery in adult males, to investigate whether protein requirements are elevated compared to protein requiremens for the general populaiotn. The main study outcome is the estimated average protein requirements for the study populaiton.
Inclusion: Male aged 18 - 65 years,; Primary RYGB surgery one to ten years before,; Weight stable within 5% over the last 3 months,; Normotensive or blood pressure controlled with antihypertensive therapy,; Provision of informed consent to participate,.
Exclusion: Weight loss after bariatric surgery of less than 40% of excess weight,; Weight regain after bariatric surgery greater than 20% of nadir weight,; Current diagnosis of cancer or active cancer in the preceding 1 year,; Any chronic or acute disease which is known to affect amino acid absorption, metabolism, or requirements,; Diabetes mellitus defined as a fasting plasma glucose concentration ≥ 7.0 mmol, or HbA1c less than 6.5%, or medical treatment for diabetes.