The taste of food is majorly influenced by two of the sense organs out of five, the nose and tongue. The taste buds are present within the papillae located on the tongue. The gustatory system of the human body is the sensory system that is moderately accountable for the insight of taste. Taste is the acuity that is stimulated when chemical substances present in the food react with the different taste receptors of our oral cavity. These taste receptors then send the signal to the brain, and that is how the sensation of taste occurs.
The sensation of taste and smell is interrelated. The condition when loss of smell occurs is termed Anosmia, and it is majorly short-term. Smoking or pollution typically affects the mucous membranes of the nose, causing this condition. The taste sensation for food is not only dependent on the tongue but also dependent on the parietal lobe of the brain.
Temperature, movement, and sense of touch are also governed by this region of the brain. When we have a cold and cough, the mucus produced is reported to block the nostrils. This, in turn, causes inflammation and difficulty in breathing. The sense of recognition of a particular smell of food is lost. Thus the activation of taste buds also is affected, which disturbs the property of signal detection of the brain. Hence, the food tastes bland.
Taste buds are the true sensory organs that are present on the surface of our tongue, and these buds are responsible for the feeling of tastes that are sweet, salty, sour, and bitter. Taste receptor cells, or the gustatory cells, are found in the upper surface of the tongue, soft palate, cheek, and epiglottis.
The five types of taste receptors include receptors for salty taste, acidic, bitter, sweet, and umami. Different regions of the tongue are responsible for the detection of these different tastes.
The chemical compounds of the food come in contact with the saliva and then with the taste receptors through tiny openings called taste pores. The seventh, ninth, and tenth cranial nerves are reported to transmit the information from taste receptor cells to the brain. Other neurotransmitters like serotonin and GABA help in cell-cell communication in the taste bud and trigger the sensation of taste. The term “ageusia” is used when a person has lost the sensation of taste or has a tasteless tongue. Infections, medications and nutritional deficiencies are reported to be the reasons behind this condition.
When we have a nasty cold and a congested nose, then also the food may taste dull, flavourless or bland. This condition is called dysgeusia, where the taste of the food may appear unpleasant. It occurs due to certain treatments, medical conditions, flu or due to vitamin or mineral deficiencies. In rare cases, dysgeusia can also indicate underlying liver disease or other serious health conditions.
The condition of loss of sensation of taste is known as ageusia. The probable reasons reported for this condition are nasal congestion, allergies, sinus infection, common cold, flu, salivary gland infections, and periodontal disease. The other diseases that can be linked to this condition are diabetes, Sjogren’s syndrome, high blood pressure, and Alzheimer’s disease.
When we have a cold with a stuffy nose, the sensations of taste and smell are lost. This condition is called temporary anosmia. When our food is chewed, the food is broken down, and a different aroma is released from the food, which helps in the activation of smell receptors in our nose. When our nose is blocked due to a cold, the sensory cells in our nose are not activated, and the sensation of smell is lost. This, in turn, affects the activation of taste buds and disturbs the property of signal detection of the brain. Hence, we experience a loss of taste.
The foods to eat when we have a cold are-
Vitamin C-rich fruits or citrus fruits. It will not only soothe the sore throat but can also prevent us from catching a cold. Foods such as Kale, broccoli, cranberries, green tea, and red onions contain large amounts of antioxidants, majorly quercetin which helps us to fight the flu. Peppers and ginger are reported to clear nasal congestion and soothe our throats.
When we are experiencing common cold symptoms, it is very important to stay hydrated. Foods such as herbal teas are often refreshing and soothe our sore throats. Inhaling the steam often unblocks nasal congestion. Drinks containing hot water and turmeric are very helpful as turmeric is reported to have anti-inflammatory properties. Tea leaves contain polyphenols, flavonoids, and catechins; these compounds are reported to boost the immune system and help in germ-fighting. Honey is very effective in treating cold symptoms as it is rich in antimicrobials that help in the clearance of the infection. Citrus fruits and berries contain flavonoids and vitamin C that are reported to decrease inflammation and help in the reduction of fever.
When we have a cold, we experience a loss of sensation of taste which is termed ageusia, and this makes our food taste bland.
Taste buds are the true sensory organs present on the surface of the tongue. They are responsible for the feeling of taste.
When we have a cold and cough, excess mucus is produced, which blocks the nostrils. This causes inflammation and difficulty in breathing. The smell receptors get blocked, and in turn, the cranial nerves are unable to transmit signals to the brain, and thus the taste receptors are affected, which makes the food taste bland.
The foods we should take during cold weather are citrus fruits, Kale, broccoli, cranberries, green tea, and red onions. Peppers and ginger are reported to clear nasal congestion. Tea leaves contain polyphenols, flavonoids, and catechins that boost the immune system. Honey is very effective in treating cold symptoms due to its antimicrobial property.
1. Why does food taste bland when you have a cold?
When you have a cold, your nasal passages are blocked with mucus. This mucus covers the olfactory (smell) receptors in your nose, preventing them from detecting the food's aroma. Since about 80% of what we perceive as 'flavour' comes from our sense of smell, blocking it makes food seem bland or tasteless, even if your taste buds are working correctly.
2. What is the main difference between taste and flavour?
Taste refers to the five basic sensations your tongue detects: sweet, sour, salty, bitter, and umami. Flavour is a much more complex experience. It is the combination of taste from the tongue, the aroma (smell) from the nose, and other sensations like the food's texture and temperature.
3. If taste buds are on the tongue, why is the nose so important for enjoying food?
While taste buds identify basic tastes, the nose identifies thousands of different smells. When you chew, aroma molecules travel from your mouth up into your nasal cavity. Your brain combines the simple taste signals from the tongue with the complex smell signals from the nose to create a rich, distinct flavour profile. Without smell, you might know something is sweet, but you wouldn't be able to tell if it's a strawberry or a mango.
4. Can you still detect basic tastes like 'salty' or 'sweet' with a blocked nose?
Yes, you can. A cold affects your sense of smell, not your basic sense of taste. Your taste buds on your tongue will still work, so you can tell if food is salty or sweet. However, you will miss the complex and nuanced flavours that depend on smell, which is why everything seems to taste the same.
5. What is the gustatory system and what does it do?
The gustatory system is the sensory system responsible for our sense of taste. It is made up of taste buds, which are located on our tongue and other parts of the mouth. These taste buds contain special receptor cells that detect the five basic tastes in the food and drinks we consume.
6. How does the brain process taste and smell signals together?
The information from taste buds (gustatory signals) and smell receptors (olfactory signals) are sent to different parts of the brain initially, but they converge in an area called the orbitofrontal cortex. This is where the brain integrates both sets of information to produce the overall perception of flavour, connecting it with memory and emotion.
7. What are the main functions of the tongue?
The tongue is a versatile organ with several important functions. These include: