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Home NEWS Science News

Lower-sodium turkey breast wins sensory test over full-salt option

Bioengineer by Bioengineer
March 13, 2020
in Science News
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UMass Amherst food scientists seek strategies to lower salt in processed food

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Credit: UMass Amherst


University of Massachusetts Amherst food scientists produced a lower-salt processed turkey that consumers in a blind sensory test preferred to a full-salt version, according to a study published in the international journal LWT-Food Science and Technology.

“This isn’t the holy grail, but it is one strategy that can help reduce salt content in processed foods,” says senior author Amanda Kinchla, extension associate professor of food science.

Researchers like Kinchla and her team are constantly looking for ways to reduce sodium in food products because so many health risks are associated with a diet high in sodium, including high blood pressure, stroke, heart disease and kidney problems. Americans typically consume more than half of their calories from ultra-processed food, which is the top source of sodium in the typical diet. Processed deli meats fall into this high-sodium category.

“The U.S. significantly overconsumes sodium from so many places,” Kinchla says. “We know this, but we aren’t changing. Consumers don’t want to buy food with known reduced salt, because they think it’s going to taste yucky.”

Processed foods are high in sodium because of the sodium diffusion that takes place inside the food during processing. Food product developers have discovered that they can manipulate the size of salt particles and use less if the salt hits the tongue first and lingers. “That is amazing and clever, but it doesn’t work with deli meat or foods with a lot of water. The salt will dissolve; you can’t keep it on the surface,” Kinchla explains.

Under Kinchla’s guidance, food science Ph.D. candidate Janam Pandya and undergraduate student Kelsey Decker tested out a novel way to reduce the excessive amount of sodium in processed turkey meat by using different sodium salt species.

The food scientists used turkey breast meat as a protein model to investigate whether limiting the sodium diffusion rates could reduce overall sodium while maintaining a quality of saltiness that consumers accept. To test this out, they incorporated sodium anionic salts, which held a larger structure or molecular weight than sodium chloride, or table salt.

“We processed a portion of turkey breast in traditional sodium chloride [table salt] and in these other salt species and measured a lot of different things: the morphology, texture and the sodium diffusion rate in the meat with different variables, such as processing time, temperature and salt conditions,” lead researcher Pandya explains.

The scientists then recruited 46 people on the UMass Amherst campus to participate in a sensory evaluation experiment of three different turkey samples: the control sample with full salt; and two with reduced sodium, one using disodium phosphate and the other a blend of sodium chloride and disodium phosphate.

The overall favorite was the turkey processed with a 50-50 blend of sodium chloride and disodium phosphate. It had 20% less sodium than the full-salt control, compared to 41% less sodium in the disodium phosphate sample. “Sensory results reported that the turkey prepared in a blend of two sodium salts was perceived to be as salty as the control while providing juiciness and texture scores that were preferred over the control,” the study states.

Kinchla explains the results: “In our study, the use of sodium salts with a larger molecular structure, such as disodium phosphate, slowed down the overall sodium diffusion rate inside the turkey meat but left enough sodium on the surface of the meat for people to perceive enough saltiness,” she says.

The study’s “promising results” suggest this is just one of the potentially successful strategies food scientists can pursue to make processed food healthier. “One approach is to find several small ways across the food supply to lower sodium without compromising the quality of the product,” Kinchla says.

###

Media Contact
Patty Shillington
[email protected]
305-606-9909

Original Source

https://www.umass.edu/newsoffice/article/lower-sodium-turkey-breast-wins-sensory

Related Journal Article

http://dx.doi.org/10.1016/j.lwt.2020.109110

Tags: Chemistry/Physics/Materials SciencesFood/Food ScienceMedicine/HealthNanotechnology/MicromachinesNutrition/NutrientsOlfactory/TastePublic HealthTechnology/Engineering/Computer Science
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