If you don't smell these five smells, it's not good.

The adults were asked to distinguish the mint, fish, orange, rose, and skin, 39 percent with the worst sense of smell, were all dead within five years.

However, it is not all that bad.

Head researcher of the study, prof. Jayant Pinto, says the discovery can help prioritize patients who are most at risk of death so that health care can be given before it is too late.

Smell failure is a warning sign, an early warning system showing that the damage may have been done.

Our “findings can provide a useful clinical test, a quick and free way of identifying patients who are at greater risk”, he added.

It should be noted that loss of smell can also be a sign of very bad colds. /Telegraphy/