The Effects of Protein Source on Appetite Control, Satiety, and Subsequent Food Intake: A Clinical Screening Study

Completed · Not applicable · Has a placebo group

Conditions studied: Appetitive Behavior

In brief

Primary Objective: To examine whether the consumption of preloads varying in protein quality effect subsequent meal energy and macronutrient content Secondary Objectives: To examine whether the consumption of preloads varying in protein quality effect postprandial feelings of hunger, fullness, desire to eat, prospective food consumption, and eating initiation. Exploratory Objective: To examine whether the consumption of preloads varying in protein quality effect postprandial cognitive performance.

Key facts

Study ID

NCT03595436

Run by

Purdue University

People needed

40

Starts

2018-06-01

Expected to finish

2019-03-30

Last updated by the study team

2019-05-02

Who can join

Age: 20 and older, up to 40. Sex: male. Healthy volunteers: accepted.

You may qualify if…

• Normal weight (BMI: 18.0-24.5 kg/m2)
• No history of smoking
• No metabolic or hormonal conditions/diseases that influence metabolism, appetite, or food intake
• No past history of surgical interventions for the treatment of obesity
• No weight loss/gain (≥10 lb. in the past 6 months)
• No medication that would influence directly appetite or cognition
• No change in any medications (over the past 3 months)
• Not currently/previously on a special diet such as Atkins/Ketogenic, high protein, vegan, vegetarian, etc.
• Habitually consumes breakfast (i.e., of at least 350 kcal on ≥ 5 days/wk prior to 9 am
• Habitually consumes lunch (i.e., of at least 350 kcal on ≥ 5 days/wk approximately 4 h after breakfast
• Not clinically diagnosed with an eating disorder such as anorexia, bulimia, night-eating syndrome
• Displays a score of <4 on the Three Factor Eating Habits Questionnaire (TFEQ)
• No allergies and/or aversions to the food/ingredients included within the study
• No history of drug or alcohol abuse (i.e., >14 drinks/week)
• Willing to maintain current activity dietary patterns throughout the study
• Willing to consume all study breakfast and lunch foods
• Generally healthy, as assessed from the medical history questionnaire
• Rating of ≥ 5 illustrating a minimum of "neither like nor dislike on a hedonic 9 pt taste test of the breakfast preloads

You may not qualify if…

• Clinically diagnosed with an eating disorder
• Metabolic, hormonal, and/or neural conditions/diseases that influence metabolism or appetite
• Currently or previously on a weight loss or other special diet (in the past 6 months)
• Gained/lost >10 lb. over the past 6 months
• Taking medication that would directly influence appetite (weight-loss drugs or antidepressant, steroid, or thyroid medication, unless dosage has been stable for at least 6 months)
• Not willing or able to complete all study testing procedures

Where it is running

• Purdue University — West Lafayette, Indiana, United States

Full record on ClinicalTrials.gov

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