Related Experiment Video
Updated: Jul 25, 2026
04:31
Taste Preference Assay for Adult Drosophila
Published on: September 8, 2016
Food acceptance and genetic variation in taste.
1Dietetics Program, School of Allied Health, University of Connecticut, Storrs, 06269-2101, USA
Journal of the American Dietetic Association
|June 23, 2000
Summary
Genetic taste perception influences food preferences. Women who are supertasters of 6-n-propylthiouracil (PROP) bitterness avoid sweet and high-fat foods, while men show increased liking with higher PROP bitterness.
Area of Science:
- Sensory science and genetics
- Human taste perception and food acceptance
Background:
- Genetic variation in taste, such as the perception of 6-n-propylthiouracil (PROP) bitterness and fungiform papillae density, influences how individuals experience food.
- Understanding these genetic taste variations is crucial for explaining differences in food preferences and dietary choices.
Purpose of the Study:
- To investigate the association between genetic taste variation (PROP bitterness and papillae density) and the acceptance of sweet, high-fat, and bitter foods and beverages.
- To determine if individuals with high PROP bitterness perception experience sugars as sweeter, fats as creamier, and other bitters more intensely.
Main Methods:
- Assessed genetic taste variation using perceived bitterness of 0.0032 mol/L 6-n-propylthiouracil (PROP) and fungiform papillae density.
- Categorized foods and beverages into sweet, fat, and bitter groups using principal components analysis of questionnaire data.
- Analyzed correlations between genetic taste measures and food/beverage acceptance in healthy adults (n=46).
Main Results:
- Significant diversity in PROP bitterness perception and papillae density was observed, with differences between men and women.
- In women, increased PROP bitterness correlated with decreased liking of sweet and high-fat foods.
- In men, increased papillae density correlated with increased liking of sweet and high-fat foods, while PROP bitterness was not associated with liking.
- No association was found between genetic taste measures and dislike of bitter foods.
Conclusions:
- The impact of genetic taste variation on food intake is complex, depending on the perceived intensity of sensory components and individual priorities (e.g., health, convenience).
- Female PROP supertasters may avoid intensely sweet or high-fat foods due to sensory overload, despite potential health benefits or masking of bitterness with condiments.
- Male taste perception responses to sweet and fatty foods differ from females, highlighting sex-specific genetic influences on dietary acceptance.
Related Concept Videos
01:43Gustation
Gustation is a chemical sense that, along with olfaction (smell), contributes to our perception of taste. It starts with the activation of receptors by chemical compounds (tastants) dissolved in the saliva. The saliva and filiform papillae on the tongue distribute the tastants and increase their exposure to the taste receptors.
01:43Incomplete Dominance
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
01:20Taste Buds and Receptors
Gustation, or the sense of taste, is intrinsically linked to the anatomical structures located on the tongue. This organ's surface, along with the entirety of the oral cavity, is adorned with stratified squamous epithelium. Evident on the tongue are elevated structures known as papillae (singular = papilla), which house the mechanisms for the transduction of gustatory stimuli. Four distinct types of papillae exist, each identified by their unique morphological attributes: the circumvallate,...
01:24The Physiology of Taste
The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the diffusion of...
01:27Principles of Pharmacogenetics: Types of Genetic Variants
The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
01:14Conditioned Taste Aversion
Conditioned taste aversion, also known as sauce béarnaise syndrome, is a phenomenon in which an individual develops an aversion to a certain food taste following a negative experience, typically illness. This form of aversion is a type of classical conditioning in which the taste of the food (conditioned stimulus, CS) is associated with the experience of illness (unconditioned stimulus, UCS).
A notable characteristic of conditioned taste aversion is that it often requires only a single exposure...
A notable characteristic of conditioned taste aversion is that it often requires only a single exposure...