NCT03241576

Provision of Small vs. Large Portion Sizes and Later Food Intake

Provision of Small vs. Large Portion Sizes and Later Self-selected Food Intake: 3 Experimental Laboratory Studies in UK Participants

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 307 (actual)
• Sponsor: University of Liverpool · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

In 3 laboratory experiments the effect that receiving a small vs. large portion size of food has on later intake of that food was examined

Detailed description

Historical increases in the size of commercially available food products have been linked to the emergence of a worldwide obesity crisis. Although the acute effect portion size has on food intake is well established, the effect that exposure to smaller portion sizes has on future portion size selection is yet to be examined.We tested whether reducing a food portion size may 'renormalize' perceptions of what constitutes a normal amount of food to eat and result in people selecting and consuming smaller portions of that food in future. Across three experiments participants were served a large or smaller portion of food. In experiments 1-2, twenty four hours later participants freely selected and consumed a portion of that food. In experiment 3, one week later participants reported on their preferred portion size of that food.

Conditions

• Eating Behavior

Interventions

Type	Name	Description
BEHAVIORAL	Small portion size provision	The intervention is the small meal size participants are provided with during a lunchtime session in the laboratory.
BEHAVIORAL	Large portion size provision	The intervention is the large meal size participants are provided with during a lunchtime session in the laboratory.

Timeline

• Start date: 2015-05-01
• Primary completion: 2017-04-01
• Completion: 2017-04-01
• First posted: 2017-08-07
• Last updated: 2017-08-07