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Basic properties of umami and effects on humans.

S Yamaguchi1

  • 1Central Research Laboratories, Ajinomoto Co., Inc., Kawasaki, Japan.

Physiology & Behavior
|May 1, 1991
PubMed
Summary

The taste of umami substances like MSG and IMP is influenced by both anions and cations, with sodium playing a key role. IMP

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Area of Science:

  • Food Science
  • Sensory Science
  • Neuroscience

Background:

  • Umami taste is a fundamental human taste, often associated with savory flavors.
  • Monosodium glutamate (MSG) and inosine monophosphate (IMP) are common umami substances.
  • The ionic components of taste substances can significantly affect their sensory perception.

Purpose of the Study:

  • To review the taste contributions of anions and cations in umami substances.
  • To investigate the role of sodium cations in the taste perception of MSG and IMP.
  • To explore the mechanism behind IMP's umami taste and its interaction with MSG.

Main Methods:

  • Literature review of existing studies on umami taste perception.
  • Analysis of taste thresholds for MSG, IMP, and sodium chloride (NaCl).
  • Evaluation of the synergistic effects between umami substances and sodium.

Main Results:

  • While anions primarily drive umami taste, cations like sodium significantly influence perception, approaching taste thresholds.
  • Sodium's effect is crucial for IMP's umami taste, which may be mediated by salivary components.
  • IMP enhances the umami taste of MSG, indicating a synergistic interaction.

Conclusions:

  • Both ionic components (anions and cations) are critical for umami taste perception.
  • Sodium ions play a vital role in modulating the taste of umami substances like IMP.
  • Further research is needed to fully elucidate the complex mechanisms of umami taste synergy.

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