Until now, humans were believed could distinguish five different flavors like salty, sweet, bitter, sour, and umami, which is present in protein rich foods.

Dr Russell Keast from Deakin University says there is another flavor and the flavor was fat. For knowing that you are eating fat, you do not have to eat a fat laden breakfast.

Researchers said that 33 people were put under a study and all of them detected fat when it was mixed with non-fat foods that gives evidence of fat being a distinct flavor.

Dr Keast believes that by consuming too much fat people become less sensitive to fat but this was not of a permanent nature.

He said, "We believe that if you consume a high-fat diet, you will adapt to that level of fat in the diet and will actually desensitise in your response to fat. We think that is somewhat of a maladaptation to the modern, high-fat environment we live in."

If fat was reduced in food then the reverse could happen, he added.

But body would get convinced that it was not getting fat and could resort to a fatty diet that would make low-fat foods ineffective.

Deakin University researchers say that these findings might show the way to producing foods that fool the body into thinking it has had its fill of fat.