Scientists have recently identified the fifth taste known as "umami" (savory). Taste buds can detect "umami" evoked by Glutamatic Acids (or Glutamate).

Glutamic Acid is naturally found in many food. Artificial Glutamic Acid constitutes the active ingredient to flavour enhancers. Glutamic acid bound to protein cannot stimulate the taste receptors located in taste buds. Only Free Glutamic Acid can enhance the flavour of food.