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Fat perception is related to PROP taster status
1Department of Food Science, Cook College, Rutgers University, New Brunswick, NJ 08903-0231, USA. Tepper@taste-test.rutgers.edu
Physiology & Behavior
|June 1, 1997
Summary
Genetic differences in taste perception, specifically 6-n-propylthiouracil (PROP) taster status, are linked to enhanced sensitivity to oral sensations like capsaicin and improved ability to detect fat content in foods.
Area of Science:
- Sensory science
- Genetics
- Human physiology
Background:
- Individuals sensitive to phenylthiocarbamide (PTC) and 6-n-propylthiouracil (PROP) exhibit heightened sensitivity to various taste and trigeminal stimuli.
- PTC/PROP tasters possess a greater density of fungiform papillae, suggesting potential links to trigeminal innervation and oral texture perception.
- It is hypothesized that individual differences in fat perception may correlate with PROP taster status and taste bud density.
Purpose of the Study:
- To investigate the relationship between 6-n-propylthiouracil (PROP) taster status and fungiform papillae density.
- To determine if PROP tasters exhibit increased sensitivity to capsaicin.
- To assess the impact of PROP taster status on the ability to discriminate fat content in food.
Main Methods:
- Participants were categorized into PROP nontasters, medium tasters, and supertasters (n=25 per group) based on psychophysical responses to PROP and NaCl.
- Fungiform papillae density was quantified (papillae/cm²).
- Capsaicin sensitivity and fat content discrimination in salad dressings were evaluated using psychophysical methods.
Main Results:
- Significant differences in papillae density were observed across taster groups, with supertasters showing the highest density (p < 0.0001).
- Medium and supertasters reported greater oral burn from capsaicin compared to nontasters (p < 0.0001).
- Medium and supertasters successfully discriminated between 40% and 10% fat salad dressings, while nontasters could not (p < 0.005).
Conclusions:
- PROP taster status is associated with variations in fungiform papillae density and capsaicin sensitivity.
- Individuals classified as medium or super tasters demonstrate a superior ability to perceive differences in fat content.
- This study provides the first evidence linking genetic and anatomical factors (PROP taster status, papillae density) to individual differences in fat perception.