Could long-term scent exposure to certain scents be quietly shaping your brain in different ways?

We  know   certain scents can significantly enhance creativity and provide a sense of vitality by evoking specific emotions and memories, but could wearing a scent every day actually reshape the brain itself?

A recent study  by Kokubun,K,Nemoto, K et al (2024) showed  how a  continuous exposure to  rose essential oil over one month affects gray matter volume (GMV) in the human brain.

For example, researchers recruited 50 healthy women  between the ages of 41–69 and randomly assigned them to one of two groups:

Intervention group- wore clothes scented with rose essential oil (0.5%), twice a day for one month

Control group-wore clothes with unscented water

Brain scans were taken before and after the month-long period using magnetic resonance imaging (MRI).

The researchers then calculated Gray Matter, Brain Healthcare Quotients (GM-BHQ), a structural index similar to IQ, to compare gray matter volume in:

• The whole brain

• Posterior cingulate cortex (PCC)

• Amygdala

• Orbitofrontal cortex (OFC)

Key Findings

• Whole-brain GMV increased significantly in the rose-scent group

• PCC volume (linked to memory and emotion) also increased

• Amygdala and OFC volumes showed no significant change

• The effects remained even after statistical corrections

These findings suggest that sustained olfactory exposure can stimulate structural neuroplasticity, particularly in regions tied to memory and emotional processing.

So why only  rose essential oil and no other essential oils was used in the study?

Research findings has shown, rose essential oil can positively impact memory and cognitive function. If we take a look back  to the  study from Kyoto University apparently rose oil increased gray matter volume in the posterior cingulate cortex (PCC), a region in the brain associated with memory, learning, and emotions.

The PCC is particularly important because it tends to shrink in conditions like Alzheimer’s disease, and stimulating it may help maintain cognitive function, according to  Neid, D( 2025)

Why This Matters for Neuromarketing & Neuroscience

This study provides rare evidence that continuous scent exposure can reshape brain structure, bridging daily sensory experience and measurable neural change.

For Neuroscience, it underscores that:

Everyday olfactory input contributes to long-term brain plasticity

The posterior cingulate cortex, central to memory and self-referential processing, may be particularly sensitive to scent-based stimulation

Continuous scent exposure could hold potential for cognitive health and even dementia prevention

For Neuromarketing, it suggests:

Scents integrated into daily brand or product environments may leave lasting neural and emotional imprints

Continuous exposure (like scented clothing or ambient environments) might influence brand memory at a structural brain level, not just emotional state

Olfactory-based interventions could become a tool for long-term emotional conditioning and brand attachment

Conclusion

This is the first study to show that wearing a scent every day can change brain structure, strengthening regions involved in memory, emotion, and self-awareness.

Our sense of smell does not just colour our experiences, it quietly reshapes the brain behind them.

If you would like to schedule a rose aromatherapy treatment, to enchance your sences and wellbeing contact Jenny @surrealholistictherapy.com  07758754317 £55-55 minutes/£80-90 minutes

References

Kokubun, K., Nemoto, K., & Yamakawa, Y. (2024). Continuous inhalation of essential oil increases gray matter volume.cited in  https://doi.org/10.1016/j.brainresbull.2024.110896   Accessed (27.06.2026

Smelling This One Specific Scent Can Boost The Brain's Gray Matter. Nield, D(2025) cited in

Smelling This One Specific Scent Can Boost The Brain's Gray Matter : ScienceAlert  Accessed(30.06.2026)