Woman smelling orange

What Your Sense of Smell Can Reveal About Your Mental Health

Believe it or not, your sense of smell may be linked to your mood and memory. That’s because there is a connection between your brain and your olfactory system — the structure that allows you to smell. According to experts at Verywell Mind, this is why people often associate certain memories with specific smells. In fact, research has shown that there is a neural basis for this. A 2024 study published in the journal Progress in Neurobiology found that there is actually a connection between the primary olfactory cortex and the hippocampus in the brain, which is where long-term memories are stored.

Another study found that there are even specific neurons in the hippocampus that can help enable certain scents to trigger powerful memories. “Our experience with odors is typically where odor is the backdrop or context for a person, place, or emotional state,” Dr. Pamela Dalton, an experimental psychologist and faculty member at Monell Chemical Senses Center, told Verywell Mind.

Memory is closely linked to mood

Man looking out window lost in thought

How exactly can your sense of smell have an impact on your mood and mental health? As it turns out, the hippocampus not only plays a big role in our ability to store memories, but it’s also responsible for regulating mood. According to MindBodyGreen, the neocortex, which is responsible for sensory perception, typically reroutes the connection between our senses and the hippocampus. The olfactory system doesn’t quite operate in the same way, however. In fact, there appears to be a direct link between olfaction and the hippocampus.

This means that not only can certain smells trigger powerful memories, but they can also conjure certain emotions associated with those memories. For instance, the smell of certain foods may remind you of a happy childhood memory, lifting your mood in the process. This can have an important impact on your mental health. Dr. Christina Zelano, an assistant professor of neurobiology and lead investigator of the Northwestern Medicine study, told MindBodyGreen that smells and scents are a “profound part of memory,” and losing the ability to smell can lead to depression and low quality of life.

Lesa O'Leary
Lesa O'Leary

Lesa is a dynamic member of OzHelp’s Service Delivery Team as the Service Delivery Team Leader and Nurse. She has been with OzHelp for five years and believes in leading by example. Lesa has experience in the not-for-profit sector, as well as many roles throughout different industries and sectors, including as a contractor to the Department of Defence. She has expertise in delivering OzHelp’s health and wellbeing programs and engaging with clients in a relaxed and comfortable manner that aligns with the organisation’s vision and objectives.

Lesa has a Certificate 4 in Nursing from Wodonga Tafe, Certificate 4 in Mental Health from Open Colleges, and is currently undertaking a Certificate 4 in Training and Assessment from Tafe NSW. For the past few months Lesa has been an Education and Memberships committee member of the ACT Branch of the National Association of Women in Construction (NAWIC).