Scientists have reported the discovery of a new basic flavour

It was discovered that the OTOP1 protein also responds to acidity. Researchers created human cells containing the OTOP1 protein and confirmed that ammonium chloride activates its receptor as effectively as acid.

Ammonium chloride has an unpleasant taste, but people can learn to like it like spicy or acidic foods. However, before the new flavour can be made official, further research is needed.