Smell loss may signal dementia 3 years early. Discover how Scent Therapy supports cognitive wellness and why your nose might be the key to early detection.

What if your sense of smell could help detect dementia years before other symptoms appear? Researchers are now discovering that olfactory dysfunction (smell loss) may be a powerful early indicator of neurodegenerative disease. Combined with the benefits of Scent Therapy, we may have an untapped tool to not only detect decline earlier—but also support wellness, memory, and emotional health.

Table of Contents

1. How COVID-19 Changed What We Know About Smell Loss
2. Smell and Dementia: What the Research Shows
3. Why Losing Your Sense of Smell Impacts Wellness
4. How Scent Therapy Supports Brain and Emotional Health
5. What to Expect with Scent Therapy
6. FAQ: Smell Loss, Scent Therapy, and Dementia
7. Book a Scent Therapy Intake or Training
8. About the Author

How COVID-19 Changed What We Know About Smell Loss

In my new book, WHY the NOSE?, we speak about loss of smell. When COVID-19 emerged in 2020, up to 80% of people reported smell loss as a primary symptom, with many experiencing it before any fever or cough. Suddenly, the global health community had to reckon with just how central the sense of smell is to wellbeing and brain function.

Doctors now use various assessments to understand and diagnose smell loss:

• ENT exams using small endoscopic cameras
• Smell detection and identification testing
• MRI scans to assess olfactory nerve damage
• Neurological exams for brain-related conditions

This surge of olfactory research is one of the silver linings of the pandemic, shedding light on the brain-smell connection and its role in mood, memory, and mental health.

Smell and Dementia: What the Research Shows

Dementia often goes undiagnosed for 3.5 to 4.1 years after the first symptoms appear. A global review by University College London (UCL) found that delayed diagnosis remains a global issue—often due to lack of awareness, stigma, or missed early signs, such as smell loss.

Key facts:

• Smell loss is often an early symptom of Alzheimer’s and Parkinson’s disease
• Only 50–65% of dementia cases are diagnosed in high-income countries
• Women and people over 75 are most affected by smell loss and dementia

So, what if long-term care homes included smell testing during intake?

We could identify those at risk earlier, monitor changes, and introduce non-invasive interventions like Scent Therapy that stimulate the brain and support emotional wellbeing—long before medications are prescribed.

Why Losing Your Sense of Smell Impacts Wellness

Our sense of smell is deeply tied to our limbic system, the part of the brain responsible for emotion, memory, and behaviour. Losing it doesn’t just impact how we enjoy food or fragrance—it can affect mental health, safety, and social connection.

Here’s how smell loss affects wellness:

• Emotional disconnection: Scent triggers emotional memories. Without it, people often report increased isolation, depression, and anxiety.
• Loss of appetite and nutrition issues: Food becomes bland, reducing appetite and leading to weight loss or malnutrition—especially dangerous for seniors.
• Safety concerns: People who cannot smell are at greater risk of missing warning signs like gas leaks, smoke, or spoiled food.
• Lower quality of life: Missing the scent of rain, a partner’s perfume, or a favourite meal can lead to grief and emotional dullness.
• Cognitive decline: Studies now link olfactory dysfunction to early-stage cognitive impairment, making smell loss a neurological warning sign.

A 2019 study by Dr. Anna Wolf and Dr. Alex Bahar-Fuchs showed that smell training improved cognition and mood in older adults. It’s not just about sniffing scents—it’s about awakening the brain.

How Scent Therapy Supports Brain and Emotional Health

Scent Therapy is an intentional, science-based approach that uses essential oils and natural scents to stimulate the brain. Unlike aromatherapy, Smelling Pink’s structured Scent Therapy programs offer therapeutic exposure to scents known to impact mood, memory, and brain activity.

Benefits of Scent Therapy:

• Stimulates neuroplasticity: Encourages the brain to rebuild and rewire olfactory pathways
• Improves memory recall: Scents like rosemary, peppermint, and lemon are tied to cognitive enhancement
• Supports emotional healing: Certain aromas can reduce anxiety, elevate mood, and trigger positive memories
• Boosts engagement in seniors: Helps care home residents connect with their environment and feel grounded
• Accessible & non-invasive: No drugs or high-tech equipment—just intentional scent exposure

Smelling Pink offers programs rooted in neuroscience, offering customized scent kits and guided exercises for care homes, wellness professionals, and individuals alike.

What to Expect with Scent Therapy

Just like physiotherapy helps a broken limb regain function, Scent Therapy is physiotherapy for your brain via your nose.

Our Scent Therapy program includes:

• Scent Therapy kits curated for cognitive support
• Blotter Sticks
• Downloadable training manuals and support materials

FAQ: Smell Loss, Scent Therapy, and Dementia

What does smell loss feel like?
It can be partial or total. People often say food tastes bland, they feel emotionally dull, or they miss warning scents like smoke or gas.

Can Scent Therapy reverse smell loss?
While not guaranteed, it supports recovery in many people and can help maintain brain health through sensory stimulation.

Is Scent Therapy just aromatherapy?
No. Scent Therapy is a therapeutic intervention using scientifically selected scents, with cognitive and emotional goals—not just relaxation.

How do I know if I have smell loss?
Try simple tests like comparing rosemary, citrus, jasmine or vanilla. If you’re unsure, ask your doctor about formal smell testing or refer to a specialist.

Is Scent Therapy safe for seniors or those with dementia?
Yes. Our programs are gentle, non-invasive, and specifically designed for use in long-term care environments.

Book a Scent Therapy Intake or Training

Smelling Pink offers training, customized kits, and support to bring Scent Therapy into homes, care settings, and personal routines.

Book a Scent Therapy Consultation Today
Explore Smelling Pink Programs

Related Articles & Resources

• Why Essential Oils Matter in Scent Therapy
• Scent Therapy: A Natural Approach to Healing and Connection
• Smelling Therapy for Cognitive Health and Depression

About the Author

Tracy Pepe is a scent designer, author, and TEDx speaker with over 25 years of experience in the fragrance industry. She is the founder of Smelling Pink, a pioneering program using scent to improve cognitive and emotional wellness in dementia care.

 Author of Why The Nose?
Speaker: TEDx Talk – “How the Nose Knows”