This study aims to compare the effect of meals high in protein, fat and carbohydrate but equal in energy and volume on energy intake, perceived appetite and gastric emptying in younger (\<40 years) and older (\> 65 years) people living in the United Kingdom (UK).
To assess if increasing protein intake in older adults will have a compensatory decrease in energy intake due to protein's satiating effects. To compare the effect of meals high in protein, fat and carbohydrate but equal in energy and volume on energy intake and perceived appetite in younger (\<40 years) and older adults (\>65 years). To compare the effect of meals high in protein, fat and carbohydrate but equal in energy and volume on gastric emptying in younger (\<40 years) and older adults (\>65 years).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Enrollment
40
Preload smoothies that are matched for taste, smell, appearance, quantity and calorie but different caloric content.
University of Reading
Reading, United Kingdom
RECRUITINGAd-libitum meal consumption
Consumption of the ad-libitum meal is measured (g). Participants are instructed to eat until they feel comfortable full and are given 20 min to consume the meal.
Time frame: 3 days in total
Ratings of appetite
Appetite are assessed using a 100 mm Visual Analogue Scales (VAS, scale 0-100).
Time frame: 3 days in total
Gastric Emptying
Gastric emptying is measured using of 13C octanoic acid breath test
Time frame: 3 days in total
Ratings of palatability
Palatability ratings are assessed using a 100 mm Visual Analogue Scales (VAS, scale 0-100).
Time frame: 3 days in total
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