The TAS2R31 gene gives your taste cells instructions for a receptor that detects some bitter chemicals. This gene helps your body sense bitterness, so if it does not work as expected, some foods, sweeteners, or medicines may taste less bitter or simply taste different. Variants in the TAS2R31 gene are mainly linked to differences in taste perception and food preference rather than disease.
What is a gene?
Genes are stretches of DNA that hold instructions cells use to make molecules or guide processes throughout the body. Some provide the code for proteins, which do much of the cell’s work. Others mainly regulate when these processes happen, where they take place, and how active they are. Taken together, genes affect how the body develops and works, and they can also shape your response to food, stress, and medications. For a deeper look at this topic, you can find more in the LearnHub.
Overview
TAS2R31Gene function
What if the gene works
The TAS2R31 gene helps taste cells detect certain bitter substances. This supports bitter taste perception and may influence how foods and drinks taste to you.
Risk
What if the gene does not work
Changes in the TAS2R31 gene can make its bitter taste receptor respond less, differently, or not at all to certain compounds. Milder and more severe variants can change how strongly cells detect these substances and pass the signal onward.
Treatment
What does that mean for your treatment
At present, no TAS2R31-specific treatment or management approach is established in clinical guidelines, and variants in the TAS2R31 gene do not currently guide drug choice. The TAS2R31 gene is mainly being studied for its role in bitter taste perception rather than as a therapeutic target.
Gene function
What if the gene works
Some foods taste bitter because special taste cells on your tongue are reading chemical signals. In these cells, the TAS2R31 gene helps detect certain bitter substances in foods and drinks. Understanding how the TAS2R31 gene affects bitter taste helps explain an everyday part of flavor sensing.
The TAS2R31 gene gives some taste cells instructions to make a receptor that recognizes certain bitter chemicals. When these compounds touch the tongue, that receptor can bind them and start the bitter taste response.
After sensing a bitter substance, the TAS2R31 receptor triggers signals inside the taste cell. This helps the cell pass the message onward so your brain can register that a food or drink tastes bitter.
Bitter taste is part of the body’s food screening system. By helping detect some bitter compounds, the TAS2R31 gene supports normal flavor awareness during eating and drinking.
What is a variant?
A genetic variant is a small change in the DNA sequence of a gene. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not have any noticeable effect and simply reflect natural genetic variation. In some cases, though, a variant can change how a gene functions more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
In practical terms, how variants influence the TAS2R31 gene's function depends on whether a DNA change alters the receptor's shape, stability, or placement on the cell surface. Some variants mildly reduce how well the receptor binds certain bitter molecules or sends signals inside the cell, while more severe variants can leave little or no receptor activity. Different variants may also change how strongly TAS2R31 interacts with specific compounds.
How variants are linked to conditions
Current evidence suggests the TAS2R31 gene does not yet have a broadly confirmed link to a specific health condition, so information about how variants in the TAS2R31 gene are linked to conditions is still developing. Anyone with a reported TAS2R31 gene finding should interpret it with their doctor or genetic counselor in the context of their own health and family history.
A variant is not necessarily a diagnosis
Differences in genes are a routine part of human biology and are widely found across the general population. Most of these variants do not directly affect health and instead reflect natural human diversity. For many genes, having a variant connected with a condition points to a possible link rather than a certain diagnosis, particularly when several genes and environmental influences also play a part. In some situations, though, one well understood variant in a particular gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
There isn't yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the TAS2R31 gene. Changes in this gene are mainly discussed in relation to differences in bitter taste sensitivity, and overall health effects are shaped by many other genes, diet, and everyday factors.
Inheritance of TAS2R31 variants
There is not yet a broadly confirmed Mendelian pattern for a specific health condition tied to the TAS2R31 gene, so TAS2R31 gene inheritance is usually discussed as part of normal family inheritance rather than a single dominant or recessive condition. Because the TAS2R31 gene is located on chromosome 12, which is an autosome, you inherit one copy from your mother and one copy from your father. Variants of the TAS2R31 gene can therefore be passed to children of any sex.
What does my TAS2R31 result mean for my family?
There is not yet a broadly confirmed inherited condition linked to TAS2R31 in the way seen with single-gene medical conditions. Changes in TAS2R31 are mainly studied for how people taste certain bitter flavors, so what a result means for relatives is usually limited and depends on the exact finding and the reason for testing.
Genetic information
Genetic testing
How you find out about variants
Variants in the TAS2R31 gene are found with genetic testing, usually from a saliva sample or blood draw. In TAS2R31 genetic testing for variants, a lab reads the DNA code in this gene and compares it with the usual sequence to identify differences. Results may show one or more variants, often alongside findings from many other genes.
When should I consider getting a genetic test?
There is not yet a broadly established medical reason to test the TAS2R31 gene on its own. Decisions about genetic testing are usually based on your personal health and family history and are best made with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can provide useful insight, but how much it reveals depends on the condition and the type of variant involved. Many factors, including lifestyle, environment, age, and medical history, influence how the body functions over time. For some conditions, especially those affected by many genes, genetic information provides context rather than certainty and is best understood alongside other parts of care. In other situations, a genetic result may offer a clear answer. In areas such as medication response, genetic results can also help put individual experiences into perspective.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. This helps explain why the same medication may work well for one person, do little for another, or cause more side effects in someone else. Small inherited differences can change how the body breaks down a drug, moves it through the bloodstream, or responds to it at its target, which can influence both benefit and sensitivity.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes shape their response to medications. It looks at gene and drug patterns to help explain why the same treatment may work differently from one person to another. For many medicines, genes can affect both how strongly a drug works and how the body handles it. This information can support more informed, more personalized treatment decisions. You can read more about this topic in the LearnHub.
Drugs influenced by the TAS2R31 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how people respond to medicines, so general questions about symptoms, side effects, or treatment changes are best discussed with your doctor.