Stress and food choice: a laboratory study

Area of Science:

• Behavioral neuroscience
• Nutritional psychology
• Human physiology

Background:

• Acute stress is hypothesized to selectively alter food choices.
• Previous research suggests stress may influence appetite for specific food categories.
• The interaction between stress, eating attitudes, and food preferences requires further investigation.

Purpose of the Study:

• To experimentally determine if acute stress affects food selection during a meal.
• To examine selective effects of stress on appetite for different food types (sensory, nutritional).
• To explore how eating attitudes interact with stress-induced changes in food choice.

Main Methods:

• Sixty-eight healthy participants underwent a laboratory stressor (speech preparation) or control condition.
• Food preferences and eating attitudes were assessed prior to the stressor.
• Ad libitum meal intake of various foods (sweet, salty, bland, high/low fat) was measured.
• Physiological (blood pressure, heart rate) and mood measures were recorded.

Main Results:

• The stressor effectively induced physiological and mood changes.
• Overall food intake and appetite for specific food categories were not altered by stress.
• Stressed emotional eaters consumed more sweet, high-fat foods and a more energy-dense meal compared to controls.
• Dietary restraint did not significantly influence stress-related food appetites.

Conclusions:

• Stress-induced overconsumption of sweet, high-fat foods by emotional eaters may explain previously observed links between dietary restraint, gender, and stress eating.
• Laboratory findings suggest that stress can negatively impact food choices in vulnerable individuals.
• These findings highlight potential mechanisms for stress-related health issues through altered dietary patterns.