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Protein Source on Plasma Amino Acid Concentrations

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03649568
Recruitment Status : Recruiting
First Posted : August 28, 2018
Last Update Posted : January 29, 2020
Information provided by (Responsible Party):
Wayne Campbell, Purdue University

Brief Summary:
This study will determine the effect of the same ounce-equivalents of fresh pork versus nuts, beans, and eggs on postprandial plasma essential amino acid availability in adults. Each participant will receive all four treatments.

Condition or disease Intervention/treatment Phase
Protein Deposition Other: Pork Other: Egg Other: Black beans Other: Almonds Not Applicable

Detailed Description:
The 2015-2020 Dietary Guidelines for Americans stipulates how much Protein Foods should be consumed per day and per week as part of a Healthy U.S.-Style Eating Pattern. The predominant protein sources include lean meats, poultry, and eggs, however, nuts, seeds, and soy products are also included. Ounce-equivalents (oz-eq) are used as a standard unit of measure to compare animal to non-animal protein sources. One oz-eq of lean meat (1 oz) is equal to 0.5 oz of nuts (1 oz-eq), 0.25 cups (1 oz-eq) of beans, and one whole egg (1 oz-eq). One limitation of this unit of measure is that the protein quantity and quality of the foods are not considered. For example, 1 oz-eq of pork loin contains ~7 g of dietary protein whereas 1 oz-eq of almonds contains 3 g of protein. Consequently, consuming an oz-eq portion of protein foods from different sources could have different effects on the anabolic response to feeding. The purpose of this study is to assess the effect of consuming ounce equivalent portions of fresh pork versus nuts, beans, and eggs on essential amino acid substrate availability for protein anabolism. While it would seem intuitive that this research would show that higher protein intakes from pork and egg will lead to higher plasma essential amino acid responses, this research is paramount to addressing the shortcoming of using oz-eq to achieve the Dietary Guidelines for Americans recommendations for Protein Foods. This research will serve as an important resource for future Dietary Guidelines Advisory Committees to reevaluate the appropriateness of equating animal- and plant-based Protein Foods on the current ounce-equivalent basis.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 30 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double (Investigator, Outcomes Assessor)
Primary Purpose: Diagnostic
Official Title: Effect of Consuming Ounce Equivalent Portions of Fresh Pork Versus Nuts, Beans, and Eggs as Defined by the Dietary Guidelines for Americans on Essential Amino Acid Substrate Availability for Protein Anabolism
Actual Study Start Date : August 24, 2018
Estimated Primary Completion Date : March 31, 2020
Estimated Study Completion Date : March 31, 2020

Arm Intervention/treatment
Experimental: Pork
1 ounce lean pork
Other: Pork
1 oz lean pork

Active Comparator: Egg
1 large whole egg
Other: Egg
1 large whole egg

Experimental: Black beans
0.5 cups cooked black beans
Other: Black beans
0.5 cups cooked black beans

Experimental: Almonds
1 ounce almonds
Other: Almonds
1 oz almonds

Primary Outcome Measures :
  1. Plasma amino acid concentrations [ Time Frame: 5 hours ]
    Plasma samples will be drawn at times 0, 30, 60, 120, 180, 240, and 300 minutes after the consumption of the trial meal.

Information from the National Library of Medicine

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Ages Eligible for Study:   25 Years to 39 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Male or female
  • Age 25-39
  • BMI 25-35 kg∙m-2
  • Weight stable (± 4.5 kg) 3 months pre-study
  • Not acutely ill
  • Not diabetic
  • Not pregnant or lactating
  • Not currently (or within 3 months pre-study) following a vigorous exercise regimen
  • Non-smoking
  • Willing to consume study foods and travel to testing facilities.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03649568

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Contact: Joshua L Hudson, PhD 7654948236
Contact: Jan Green

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United States, Indiana
Purdue University Recruiting
West Lafayette, Indiana, United States, 47905
Contact: Jan Green    765-496-6342   
Principal Investigator: Wayne Campbell, PhD         
Sponsors and Collaborators
Purdue University
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Principal Investigator: Wayne W Campbell, PhD Purdue University

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Responsible Party: Wayne Campbell, Principal Investigator, Purdue University Identifier: NCT03649568    
Other Study ID Numbers: 1804020520
First Posted: August 28, 2018    Key Record Dates
Last Update Posted: January 29, 2020
Last Verified: January 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No