People can 'see' flavour of foods before tasting them

Food flavoursFlavour depends on parts of the brain that involve taste, odour, touch and vision. (Agencies)

People can 'see' the flavour of foods before actually tasting them, a new study has claimed. According to research presented at the American Chemical Society's meeting in New Orleans, the eyes can beat the tongue, nose and brain in the emotional and biochemical balloting that determines the taste and allure of food.

"There have been important new insights into how people perceive food flavours," said Terry E Acree. "Years ago, taste was a table with two legs - taste and odour. Now we are beginning to understand that flavour depends on parts of the brain that involve taste, odour, touch and vision.

"The sum total of these signals, plus our emotions and past experiences, result in perception of flavours, and determine whether we like or dislike specific foods," Acree said.

Acree explained that the popular Sauvignon Blanc white wine, for instance, gets its flavour from scores of natural chemicals, including chemicals with the flavour of banana, passion fruit, bell pepper and boxwood. But when served a glass of Sauvignon Blanc tinted to the deep red of merlot or cabernet, people taste the natural chemicals that give rise to the flavours of those wines.

The sense of smell likewise can trump the taste buds in determining how things taste, said Acree, who is with Cornell University. In a test that people can do at home, psychologists have asked volunteers to smell caramel, strawberry or other sweet foods and then take a sip of plain water; the water will taste sweet. But smell bread, meat, fish or other non-sweet foods, and water will not taste sweet. While the appearance of foods probably is important, other factors can override it.

Acree pointed out that hashes, chilies, stews and cooked sausages have an unpleasant look, like vomit or feces. However, people savour these dishes based on the memory of eating and enjoying them in the past. The human desire for novelty and new experiences also is a factor in the human tendency to ignore what the eyes may be tasting and listening to the tongue and nose, he added.

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