Slow Down: Behavioural and Physiological Effects of Reducing Eating Rate

Area of Science:

• Nutritional Neuroscience
• Behavioral Science
• Human Physiology

Background:

• Slowing eating rate is a potential strategy for reducing overall food consumption.
• Understanding the physiological and cognitive mechanisms is crucial for effective weight management.

Purpose of the Study:

• To investigate the impact of eating rate on post-meal responses.
• To explore effects on appetite, hormones, brain activity, memory, and snack intake.

Main Methods:

• Feasibility study with 21 healthy participants (mean age 23).
• Random assignment to normal (6 min) or slow (24 min) eating rate for a 600 kcal meal.
• Measurements included functional magnetic resonance imaging (fMRI), gastrointestinal hormones (peptide YY, ghrelin), appetite ratings, memory, and snack consumption.

Main Results:

• The slow eating group reported greater fullness and more accurate portion size memory 2 hours post-meal.
• Greater ghrelin suppression and a linear relationship between eating time and brain activity in satiety/reward regions were observed in the slow group.
• The slow eating group consumed 25% less energy from snacks 3 hours post-meal.

Conclusions:

• Slowing eating rate influences satiety, memory, and hormonal responses, impacting subsequent food intake.
• These findings suggest eating rate is a modifiable factor with implications for weight management interventions.