General Decrease of Taste Sensitivity Is Related to Increase of BMI: A Simple Method to Monitor Eating Behavior

Area of Science:

• Sensory Science
• Human Physiology
• Nutritional Science

Background:

• Body Mass Index (BMI) is a key indicator of body fatness.
• Altered taste perception is increasingly recognized as a factor in weight regulation.

Purpose of the Study:

• To investigate the relationship between taste identification ability and BMI.
• To assess taste responses to various stimuli across different weight groups.

Main Methods:

• Recruited participants across normal-weight, overweight, and obese categories.
• Administered taste stimuli (sweet, sour, salty, bitter, fat, neutral) to each side of the tongue.
• Assessed taste identification using a multiple-choice paradigm and calculated lateralization scores.

Main Results:

• A general decline in taste sensitivity was observed with increasing BMI.
• Fat taste perception (using rapeseed oil) was an exception, not decreasing with higher BMI.
• Age, gender, and stimulus concentration were also identified as influencing taste sensitivity.

Conclusions:

• Findings suggest taste perception changes with body weight, potentially influencing eating behaviors.
• Insights may inform the development of novel weight loss and maintenance therapies.
• Results support personalized diet planning that aligns with individual taste preferences and nutritional needs.