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Scientists establish fat as sixth human taste
Monday January 16, 2012 07:01:49 AM,
IANS
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London: Scientists
have stumbled on the sixth basic taste that our tongues can detect
-- fat -- after sweet, sour, salty, bitter and savoury.
A team in the US has located a chemical receptor in the tongue's
taste buds that recognises fat molecules, whose sensitivity varies
between individuals.
The finding may help to explain why some people consume more fatty
foods, as they are less aware of the taste as they eat.
The study found that those with half as much CD36 were eight times
less sensitive to the presence of fat.
Researchers hope their discovery can be exploited to combat
obesity by increasing people's sensitivity to fat in their food.
Apart from the basic tastes, other aspects of food flavour
actually come from the smell and are detected in the nose.
The research team, from the school of medicine at Washington
University, St Louis, showed that people with more of CD36 were
better at detecting the presence of fat in food.
They found that variations in a gene that produces CD36 makes
people more or less sensitive to the presence of fat.
"The ultimate goal is to understand how our perception of fat in
food might influence what foods we eat and the qualities of fat
that we consume," said Nada Abumrad, professor at Washington, who
led the research.
Up to 20 percent of people are believed to have a variant of the
CD36 gene that is tied with producing lower levels of the
receptor, which could mean they are less sensitive to the presence
of fat in food. This may make them more prone to obesity.
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