Oleogustus, The Sixth Taste Your Tongue Can Detect
According to a study published in the journal Chemical Senses, oleogustus (Latin for "a taste for fat") qualifies as a sixth basic taste, as people could distinguish it from sweet, sour, bitter, salty, and umami. Unfortunately, oleogustus doesn't taste that great. Scientists speculate that it could function as a warning mechanism, similar to bitterness. This sets it apart from the traditional mouthfeel we tend to associate with fatty foods, which is pleasant.
from Inside Science
Key Facts In This Video
The five basic tastes are sour, sweet, salty, bitter, and umami. (0:22)
Scientists from Purdue University have published research indicating that the taste of fats should be considered the sixth basic taste. (1:12)
Other tastes, such as calcium, may also be identified in the future. (2:30)