Why the first bites taste best and pleasure diminishes with continued eating.
What the evidence says
- Sensory-specific satiety: pleasantness of a food declines as it is eaten, relative to uneaten foods1
- The first bites of food provide the most pleasure; this diminishes with continued consumption1
- With continuous consumption, a positive affective response can turn negative1
- The effect is sensory (taste, texture, appearance) not caloric1
- Variety increases total food intake by 44-60% compared to single-food meals1
- The variety effect requires foods to differ across multiple sensory dimensions (taste, texture, color) — three yogurt flavors differing only in taste produced no enhancement of intake, while three flavors differing in taste, texture, and color did2
- "Full" for one food doesn't mean full for different foods — explains "dessert stomach"1
- Awareness of declining pleasure helps stop eating before overeating3,1