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.
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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)