Thursday, May 30, 2024

Eating dried fruits, chili, menthol, and rapeseed oil can compensate for loss of smell

Smell plays a key role in our ability to enjoy food. However, many people suffer from a lost, impaired, or distorted sense of smell, and this can affect health and quality of life, says a new study from Aarhus University in Denmark.

Losing your sense of smell or having it distorted affects more than your cooking and eating habits, says Alexander Wieck Fjældstad, associate professor, MD. He was part of establishing Denmark’s first clinic for smell and taste, and is the author of the study recently published in the journal Foods.

“Reduced enjoyment when eating and the social consequences of it are very important to patients and often have serious consequences for their quality of life,” says Fjældstad.

The study shows that 39% of patients with severe smell disorders have a significantly increased incidence of weight loss, which can negatively affect their health.

Getting cooking over with as fast as possible

A total of 692 people answered a questionnaire about cooking, smell, weight changes, and sensory awareness for the study. 271 had lost or had a reduced sense of smell (olfactory dysfunction), 251 had a distorted sense of smell (parosmia), and 166 were part of a control group.

The study shows that patients with a distorted sense of smell differ from the control group regarding food preferences, and the ability and desire to cook.

“The patients expressed a wish to get through cooking as quickly as possible. They don’t find cooking to be as enjoyable an activity as previously, they are less interested in cooking for others, and have lost the desire to try new foods. And less variation in food habits can affect health,” says Fjældstad.

Previous studies have also shown that the loss or distortion of the sense of smell can have consequences ranging from social insecurity and an increased risk of depressive symptoms to an increased risk of household accidents.

How to rediscover a sense of enjoyment

The study explains how foods with different basic tastes, textures, and mouthfeel can increase a patient’s enjoyment. When a food smell released in the oral cavity is not intercepted by the smell receptors in the nose, it is possible to compensate by focusing on other sensory inputs. In other words, the other senses can enhance the experience of eating so the patient gains greater food satisfaction, a better multisensory food experience, and an improved quality of life.

“The patients find cooking challenging, but the study can help because it clarifies which ingredients are unpleasant or pleasant when your sense of smell is distorted,” says Fjældstad. He mentions dried fruits, chili, menthol, and rapeseed oil as good food options for patients who have a distorted sense of smell and taste. When eating these foods, the mouthfeel helps provide sensory stimuli when the sense of smell fails.

Patients with a distorted sense of smell in particular should avoid coffee, mushrooms, butter, ginger, black pepper, and toasted bread, as these foods generally provide significantly less pleasure. This is due to a combination of a higher incidence of distorted smell detection and the fact that some of these foods strongly stimulate the other chemical senses, which becomes unpleasant when aroma is not present.

A common problem

Taste is a multi-sensory process in which each sense contributes with different notes that together result in a complex symphony that makes us able to identify what we are eating, assess its freshness and edibility, and in the end, provides us with a sense of enjoyment. Few people realize how important a sense of smell is until they lose it.

However, in the wake of the COVID-19 pandemic, we have become even more aware of the importance of smell. Around 65% of the more than 300 million COVID-19 patients worldwide have reportedly experienced losing their sense of smell to some degree. For more than half of those people, the loss or distortion may be long term.

“In connection with COVID-19, many people experienced losing their sense of smell or having it distorted, but actually it has always been a common problem,” says Fjældstad.

Some 15% of the population has a reduced sense of smell. The problem increases with age, and is often related to many well-known diseases such as diabetes, kidney disease, and several neurodegenerative diseases. About 2% of Danes suffer from a complete loss of sense of smell.

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