Japanese researchers invent 'electric chopsticks' that make food taste more salty

Technology to the rescue

A research team led by Dr. Homei Miyashita invented these new chopsticks that use electric signals to enhance food taste. Previous research has shown that ions of sodium chloride confer saltiness to food, while those of sodium glutamate confer sweetness. By sending a weak electric charge along with the food, one that does not harm humans, the researchers wanted to change the perception of taste, even though salt levels were comparatively lower.  

To achieve this, the team developed a pair of chopsticks that can deliver a weak charge and is controlled by a mini-computer that sits on a wristband, that the person using the chopsticks must wear. 

Speaking to The Guardian, Miyashita said that the device ionizes the sodium in the food, creating additional saltiness, even though the total amount of salt in the food is low. 

Verifying with trials

To verify that their method works, the researchers recruited 36 volunteers and gave them food samples to taste that contained regular amounts of salt and reduced amounts of salt. The volunteers were able to differentiate between the two food samples when eating with traditional chopsticks. However, when eating with the ‘electric’ chopsticks, both food samples were perceived as equally salty.

Salt reduction of as much as 30 percent was achieved without a loss in taste during this study. This is above the 20 percent reduction in salt intake that the Japanese Health Ministry has recommended. 

Interestingly, the collaboration has developed not just chopsticks but also spoons and tea bows, which can deliver similar results. The chopsticks are likely to be the first products released, perhaps as early as next year.