Natural
Salt Reduction

A Dual-Pathway Approach Based on Retronasal Olfaction and Saliva Processing

Salt perception is a complex sensory process that involves both gustatory and olfactory mechanisms, extending beyond the traditional understanding of amiloride-sensitive and amiloride-insensitive ion channels. EPC’s research on salt enhancers demonstrates that saltiness is perceived not only through taste but also through retronasal olfaction, both of which contribute to the overall flavor experience.

Salt stimulates salivary secretion, altering the ionic composition of saliva and influencing the regulation of sodium intake. When sodium ions are partially replaced by potassium ions, the interactions among ions, saliva, and salt receptors are modified, which can affect salt perception.

In addition, retronasal olfaction—mediated by both volatile and non-volatile compounds—plays an important role in shaping the onset, intensity, and persistence of saltiness. These findings highlight the multimodal nature of salt perception, where taste and aroma work together to create the overall sensory experience.