Your sense of smell changes throughout the day

​New research links circadian rhythm and sense of smell. Here's when your nose is most powerful.

By  David Orenstein-Brown

Smell sensitivity varies over the course of a day, new research suggests.
The pattern, according to the data collected by studying 37 teens, tracks with the body’s internal day-night cycle, or circadian rhythm.
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“This finding is very important for olfactory perception science,” says Rachel Herz, lead author of the study and an adjunct assistant professor of psychiatry and human behavior at the Warren Alpert Medical School of Brown University. “This hadn’t been known before and this is the first clear, direct evidence.”

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