What is the smallest particle you can feel with your tongue?

Answer 1

The smallest particles you can typically feel with your tongue are those that are around 5 to 10 micrometers in size, such as sugar or salt crystals. These particles can activate the sensory receptors on your tongue, allowing you to perceive their texture and taste. However, individual taste receptor cells can respond to molecules as small as a few nanometers in size, so the perception of taste is more about molecular interaction than particle size.