Painless breath test may end need for muscle biopsies in protein studies
NCT ID NCT07317921
First seen Jan 11, 2026
Summary
This study tests whether a non-invasive breath test can accurately measure how the body builds muscle after eating protein, compared to the current gold-standard method that requires muscle biopsies. Eight healthy adults will drink protein shakes with special tracers, then provide breath, urine, and blood samples along with two small muscle biopsies. If the breath test works, it could make future nutrition research much easier and less painful for volunteers.
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Kinesiology & Physical Education
RECRUITINGToronto, Ontario, M5S 2C9, Canada
Contact
Contact Phone: •••-•••-•••• Email: •••••@•••••
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Protein drink with stable isotope tracers
What this could lead to
If successful, this could replace painful muscle biopsies with a simple breath test to study how protein builds muscle.
What could go wrong
This is a very small early study (8 people) that only checks if the new method matches the old one. It does not test any treatment or health benefit.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.