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17 June 2010

Why some like things salty

Low-salt chips taste fine to some people but are tasteless to others, and researchers report this is because your genes prime you to like a little or a lot of salt.

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Low-salt chips taste fine to some people but are tasteless to others, and researchers report this is because your genes prime you to like a little or a lot of salt.

"Most of us like the taste of salt. However, some individuals eat more salt, both because they like the taste of saltiness more and also because it is needed to block other unpleasant tastes in food," study author John Hayes, an assistant professor of food science at Pennsylvania State University College of Agricultural Sciences, said in a university news release.

Hayes says their research is important because the food industry is attempting to reduce salt content in certain foods because of health concerns. Studies have shown that diets high in salt boost the risk of heart attack and stroke, although the salt industry disputes these findings.

The study

In the new study, 87 participants - 45 men and 42 women aged 20 to 40 - ate salty foods like chips and pretzels. They rated the intensity of taste.

"Some people, called super-tasters, describe bitter compounds as being extremely bitter, while others, called non-tasters, find these same bitter compounds to be tasteless or only weakly bitter," Hayes said.

"Response to bitter compounds is one of many ways to identify biological differences in food preference because super-tasting is not limited to bitterness. Individuals who experience more bitterness also perceive more saltiness in table salt, more sweetness from table sugar, more burn from chili peppers, and more tingle from carbonated drinks."

The findings

The researchers also found that "super-tasters, people who experience tastes more intensely, consume more salt than do non-tasters," he said. "Snack foods have saltiness as their primary flavuor, and at least for these foods, more is better, so the super-tasters seem to like them more."

The study was publishedin the journal Physiology & Behaviour. - (HealthDay News, June 2010)

 
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