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Knee replacement patients may regain muscle faster with amino acid supplement
NCT ID NCT07634523
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether taking branched-chain amino acid (BCAA) supplements for three months after knee replacement surgery can help improve muscle mass and strength in patients with sarcopenia (age-related muscle loss). About 140 adults aged 40 to 100 will be randomly assigned to receive either BCAA granules or standard care. Researchers will measure muscle mass, grip strength, and physical function at 5 and 15 weeks after surgery.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
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About 140 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Feb 2025
- Expected to finish
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May 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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40 to 100 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1\. Patients aged 40 to 100 years who are scheduled to undergo total knee arthroplasty. Exclusion Criteria: 1. Participants who used antiretroviral agents within 4 weeks before the first administration of Livact. 2. Participants who used medications associated with fatty liver within 4 weeks before the first administration of Livact, including thiazolidinediones, sodium glucose cotransporter 2 inhibitors, amiodarone, methotrexate, tamoxifen, valproate, or corticosteroids. 3. Participants who used branched chain amino acid products or multinutritional supplements within 4 weeks before the first administration of Livact. 4. Participants who used pain medications other than those prescribed for total knee arthroplasty treatment within 2 weeks before the first administration of Livact. 5. Participants with markedly decreased hepatic protein synthetic function. 6. Participants with congenital branched chain amino acid metabolism disorders. 7. Participants with hereditary galactose intolerance, Lapp lactase deficiency, or glucose galactose malabsorption. 8. Participants with a history of high tibial osteotomy. 9. Participants with neurologic diseases such as stroke or Parkinson disease. 10. Participants with gait disturbance due to causes other than arthritis. 11. Participants taking medication for spinal stenosis. 12. Participants with a history of hypersensitivity to the investigational product or its components. 13. Pregnant or breastfeeding participants. 14. Participants planning pregnancy during the trial or who have the possibility of pregnancy but do not agree to use appropriate contraception during the trial. 15. Participants judged by the investigator to be inappropriate for participation in the clinical trial.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
2 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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CHA Bundang Medical Center
ACTIVE_NOT_RECRUITINGSeongnam-si, Gyeonggi-do, 13496, South Korea
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Chung-Ang University Hospital
RECRUITINGSeoul, Seoul, 06973, South Korea
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Seoul National University Hospital
RECRUITINGSeoul, Seoul, 03080, South Korea
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