Free-Range vs. factory chicken: which builds more muscle?
NCT ID NCT06489886
First seen Jun 25, 2026 · Last updated Aug 19, 2026 · Updated 3 times
Summary
This study looks at whether chicken raised using conventional or regenerative farming methods changes how your body processes nutrients and builds muscle. Nineteen healthy, active adults will eat a portion of chicken from each farming method, and researchers will measure blood nutrient levels and muscle protein synthesis in the lab. The goal is to understand if farming practices can impact human health beyond just the food's basic nutrition.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- chicken breast meat (conventional vs. regenerative)
- What this could lead to
- If successful, this could show that farming practices affect the nutritional quality of chicken and its ability to support muscle building.
- What could go wrong
- This is a very small, early-stage study with only 19 participants, so results may not apply broadly. It measures short-term lab responses, not long-term health outcomes.
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
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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19 people
The number who actually took part.
- Started
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Oct 2024
- Expected to finish
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Oct 2026
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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18 to 30 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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: Healthy active males and females (To be considered active, volunteers must meet the following American College of Sports Medicine's guideline for physical activity for healthy adults: performing at least 150 minutes per week of moderate-to-vigorous intensity physical activity. Age18-30 years Normal weight (BMI between 18 and 25 kg/m2 Exclusion Criteria: Health or dietary restrictions that would prevent consumption of the test foods Known food allergy to chicken Anemia (low red blood cell count) Overweight or obesity (BMI \> 25 kg/m2) Receiving any medication that may interfere with the study Metabolic or endocrine disorder that would affect the digestion, absorption, and/or physiological response to any of the nutrients ingested. Currently not meeting the ACSM physical activity recommendations (IPAQ score \< 150 min/week of moderate-to-vigorous physical activity. Pregnancy
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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UC Davis CTSC Clinical Research Center
Sacramento, California, 95817, United States
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