A poor sense of smell might matter more than you thought

As one of the five major senses, you could argue that our sense of smell is the least important. Sight, hearing, touch, and taste may poll better than smell, but try telling that to someone who has lost their sense of smell entirely. The truth is that loss of the ability to smell comes with a significant cost, because olfaction serves several purposes that affect quality of life and even safety, including stimulation of appetite enhancement of the sense of taste alerting you to which foods should not be eaten (if they’re rotting, for example) warning you of danger (as with smoke warning of fire). Loss of smell can also be a sign of illness. For example, sinus infections, sinus tumors, and neurologic diseases such as multiple

from https://www.health.harvard.edu/blog/a-poor-sense-of-smell-might-matter-more-than-you-thought-2019061816857

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