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The Role of Satiety in the Effect of Portion Size on Intake

The Pennsylvania State University (PENNSTATE) logo

The Pennsylvania State University (PENNSTATE)

Status

Terminated

Conditions

Feeding Behavior

Treatments

Other: 125% Portion Size
Other: 100% Portion Size
Other: 150% Portion Size
Other: 175% Portion Size

Study type

Interventional

Funder types

Other

Identifiers

NCT03409601
PortionSize104

Details and patient eligibility

About

The study uses a crossover design in which the portion size of food is varied at each meal. Across four test meals, subjects will be served four different portions of food, and intake will be determined from pre- and post-meal food weights. The first visit will be a screening visit, at which subjects will complete the consent form, have their height and weight measured, and rate the taste of the study food. Test meals will be scheduled once a week for four weeks. At visits 2-5, subjects will eat lunch and rate characteristics of the meal. At visit 6, subjects will complete various questionnaires. The objective of this study is to determine whether any individual characteristics related to satiety influence the effect of portion size on intake.

Enrollment

14 patients

Sex

All

Ages

20 to 65 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • Be willing and able to travel to Penn State University Park campus weekly for meals
  • Be a man or woman 18 - 60 years old
  • Regularly eat 3 meals/day
  • Be willing to avoid alcohol the day before and during test days
  • Have a body mass index between 18.0 and 35.0 kg/m-squared
  • Be willing to refrain from eating after 10 pm the evening before test sessions

Exclusion criteria

  • A smoker
  • An athlete in training
  • Pregnant or breastfeeding at the time of screening
  • Have taken prescription or non-prescription drugs that may affect appetite or food intake within the last 3 months
  • Dislike or be unable to eat the test foods (because of allergies, intolerance, or dietary restrictions)
  • Currently dieting to gain or lose weight
  • Have a health condition that affects appetite
  • Have participated in a similar study in our lab in the past year

Trial design

Primary purpose

Basic Science

Allocation

Randomized

Interventional model

Crossover Assignment

Masking

Single Blind

14 participants in 4 patient groups

100% Portion Size
Experimental group
Description:
Test meal consists of baseline (100%) portion size of meal.
Treatment:
Other: 100% Portion Size
125% Portion Size
Experimental group
Description:
Test meal consists of food portion size that is 125% the size of baseline portion.
Treatment:
Other: 125% Portion Size
150% Portion Size
Experimental group
Description:
Test meal consists of food portion size that is 150% the size of baseline portion.
Treatment:
Other: 150% Portion Size
175% Portion Size
Experimental group
Description:
Test meal consists of food portion size that is 175% the size of baseline portion.
Treatment:
Other: 175% Portion Size

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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