Why the science of smell deserves a place in modern health care, aging and everyday life.

What if one of the most powerful connections to our memories, emotions and everyday experiences was also one of the most overlooked aspects of our health?

Olfactive science, also known as olfactory science, studies how our sense of smell works, how the brain interprets odours, and how those experiences influence human behaviour, memory, emotion and well-being.

For Tracy Pepe, perfumer, author, TEDx speaker and founder of Smelling Pink Inc., the importance of smell goes far beyond the fragrance industry.

After more than 35 years working with scent, Pepe has made it her mission to bring olfactive science into conversations about aging, long-term care, health care and quality of life.

Her central question is simple:

If our sense of smell influences so much of our daily lives, why are we paying so little attention to it?

What Is Olfactive Science?

Olfactive science is the study of olfaction, the biological process that allows humans to detect, identify and interpret odours.

It brings together several scientific disciplines, including neuroscience, biology, chemistry, psychology and sensory research.

Every time we smell freshly brewed coffee, recognize a familiar perfume or detect food cooking, a complex neurological process takes place.

Specialized receptors in our nose detect airborne chemical molecules. These receptors communicate with the olfactory bulb, which helps process and transmit information to other regions of the brain.

Smell is closely connected to brain systems involved in emotion and memory. This helps explain why an aroma can suddenly remind us of a childhood home, a family celebration or someone we love.

How Does the Sense of Smell Work?

The process begins with a surprisingly sophisticated biological system.

1. Odour detection: Airborne molecules enter the nose and reach the olfactory epithelium.
2. Receptor activation: Specialized olfactory receptors recognize different molecular features.
3. Neural communication: Sensory neurons send signals to the olfactory bulb.
4. Brain processing: Neural pathways help identify odours and connect them with learned experiences, memories and emotions.
5. Individual perception: The brain interprets the information, producing a personal sensory experience.

Humans have hundreds of functional olfactory receptor types, allowing us to distinguish an enormous variety of odours.

And yet, despite this remarkable biological ability, the sense of smell is rarely discussed with the same attention given to vision or hearing.

That is something Tracy Pepe believes needs to change.

Why Is Olfactive Science Important?

Our sense of smell does considerably more than tell us whether something smells pleasant or unpleasant.

It contributes to how we experience the world.

1. Smell and Memory

Have you ever encountered an aroma that instantly transported you back decades?

Perhaps it was your grandmother’s baking, a favourite holiday destination or the perfume someone wore years ago.

These experiences illustrate the powerful relationship between olfaction and autobiographical memory.

Odours can evoke vivid emotional memories, sometimes without a person consciously searching for them.

For older adults, familiar scents may provide opportunities for reminiscence, conversation and meaningful social interaction.

2. Smell and Emotional Well-Being

Smell can influence emotional responses, preferences and perceptions of our surroundings.

An aroma associated with a positive experience may create feelings of familiarity, comfort or enjoyment.

However, responses to scent are highly individual. An odour that one person finds comforting may be unpleasant to someone else.

This is why understanding personal scent histories is important when developing meaningful sensory experiences.

3. Smell, Food and Nutrition

Many people believe flavour comes entirely from the tongue.

In reality, much of what we experience as flavour involves the sense of smell.

When olfactory function declines, food may become less enjoyable, even when basic taste remains intact.

For seniors, this can become particularly important.

Reduced smell sensitivity may affect food enjoyment, appetite and the ability to recognize certain food-related cues.

Recognizing changes in olfactory function can therefore contribute to a broader understanding of nutrition and quality of life.

4. Smell and Personal Safety

Our sense of smell also helps us recognize environmental warning signs.

Smoke, spoiled food and certain chemical odours can alert us to potential hazards.

When olfactory function declines, people may lose access to these sensory warnings.

Understanding smell loss is therefore about more than comfort or enjoyment. It is also about independence and safety.

What Happens When We Lose Our Sense of Smell?

Smell loss is commonly described using two important medical terms:

• Anosmia: The complete loss of the sense of smell.
• Hyposmia: A reduced ability to detect odours.

Olfactory changes can occur for several reasons, including aging, respiratory infections, certain medications, head injuries and neurological conditions.

Smell impairment is also being studied in relation to conditions such as Parkinson’s disease and Alzheimer’s disease.

However, smell loss alone does not establish a neurological diagnosis.

For Tracy Pepe, the larger issue is that many people do not realize their sense of smell has declined.

Unlike vision and hearing, olfactory function is not routinely evaluated in many care settings.

We test eyesight. We test hearing. Why aren’t we paying more attention to the nose?

This question is central to the work of Smelling Pink Inc. and the My Nose Initiative.

Tracy Pepe: Bringing Olfactive Science Into Long-Term Care

For decades, the fragrance industry has understood the relationship between scent, perception and consumer experience.

Tracy Pepe believes the health-care industry has an opportunity to explore that knowledge from a different perspective.

Through Smelling Pink Inc., Pepe has developed scent-based educational and engagement programs designed to introduce olfactory awareness into senior living and long-term care environments.

Her work focuses on an often-overlooked population: older adults who may experience diminished smell sensitivity, reduced sensory engagement or limited opportunities for meaningful reminiscence.

From Fragrance Expertise to Olfactive Education

Pepe’s career began in professional perfumery, where understanding scent chemistry, perception and emotional associations was fundamental to her work.

Over time, her interest expanded beyond fragrance creation.

She began asking how olfactory knowledge could contribute to improving everyday experiences for people living in care environments.

This led to the development of Smelling Pink’s educational programs and the My Nose Initiative, which advocates for greater awareness of olfactory health.

Her approach combines professional scent expertise, scientific education and practical engagement activities.

Rather than viewing scent as simply a fragrance in the air, Pepe encourages care providers to consider its role in personal history, social interaction and sensory identity.

What Is Olfactory Stimulation in Senior Care?

Olfactory stimulation involves introducing selected scents to encourage sensory recognition, engagement, reminiscence or conversation.

In long-term care, these activities may include familiar aromas associated with food, nature, celebrations and personal experiences.

For example, vanilla may remind someone of baking with family, while the aroma of coffee may recall a familiar morning routine.

These associations can create opportunities for storytelling and human connection.

How Smelling Pink Approaches Scent Engagement

Smelling Pink develops structured olfactory education and engagement experiences for senior care teams.

The approach emphasizes:

• Understanding how the olfactory system works.
• Recognizing the importance of smell changes with aging.
• Introducing familiar and meaningful aromas.
• Encouraging reminiscence and social engagement.
• Supporting staff education around sensory experiences.
• Respecting individual scent preferences and sensitivities.

These activities are intended to complement existing recreational and person-centred care programs, not replace medical assessment or treatment.

Although research supports the importance of olfaction in memory, emotion and quality of life, the effectiveness of particular scent-based interventions for clinical outcomes requires further study.

Why Tracy Pepe Believes Olfactive Science Needs More Attention

Tracy Pepe has spent much of her professional life working in an industry where scent is carefully measured, designed and evaluated.

Today, she is challenging health-care organizations to consider an important gap in how sensory health is approached.

As populations age, greater attention is being placed on nutrition, cognitive health, social isolation and person-centred care.

Olfactory function intersects with many of these subjects.

Yet smell is frequently missing from the discussion.

Through her writing, presentations, industry collaborations and advocacy, Pepe is working to bring this overlooked sense into greater focus.

Her work encourages care providers, researchers and policymakers to ask new questions about how olfactory awareness could contribute to better care experiences.

Innovation in health care does not always begin with something new. Sometimes it begins by recognizing something we have overlooked.

The Future of Olfactive Science in Health Care

Interest in olfactory research continues to grow, particularly in neuroscience, aging, sensory assessment and neurological health.

There are several important areas for further investigation.

Earlier Recognition of Smell Loss

Greater awareness of smell changes could encourage individuals to seek appropriate clinical evaluation when olfactory function changes.

Better Sensory Education

Training care professionals to recognize the role of smell may help support more informed conversations about sensory health and quality of life.

More Personalized Engagement

Understanding individual scent preferences and personal histories could help create more meaningful recreational and sensory activities.

Stronger Research and Evaluation

Well-designed studies are essential to determine which olfactory interventions are effective, for whom, and under what circumstances.

For Smelling Pink, these developments represent an opportunity to encourage more informed, evidence-based approaches to olfactory engagement.

FAQ: Frequently Asked Questions About Olfactive Science

What is olfactive science?

Olfactive science, also called olfactory science, is the study of the sense of smell. It examines how odours are detected, processed by the brain and associated with memory, emotion, behaviour and health.

Is olfactive science the same as aromatherapy?

No. Olfactive science examines the biological and neurological mechanisms of smell. Aromatherapy is a practice involving aromatic substances, often essential oils, for intended wellness effects. Scientific evidence for specific aromatherapy claims varies.

Why is the sense of smell important for seniors?

Smell contributes to food enjoyment, environmental awareness, emotional memory and quality of life. Changes in olfactory function can affect everyday experiences, particularly among older adults.

Can smell trigger memories in people living with dementia?

Familiar aromas may evoke personal associations and create opportunities for reminiscence and interaction. Responses vary, and scent-based activities should not be represented as treatments or cures for dementia.

Can olfactory stimulation restore the sense of smell?

Not necessarily. Structured olfactory training has been studied for certain forms of smell dysfunction, but outcomes vary according to the underlying cause. Recreational scent engagement is different from clinical olfactory training.

Who is Tracy Pepe?

Tracy Pepe is a Canadian perfumer, author, TEDx speaker and entrepreneur with more than 35 years of experience in scent and fragrance. She is the founder of Smelling Pink Inc. and the My Nose Initiative, and advocates for greater recognition of olfactive science in aging and long-term care.

What does Smelling Pink Inc. do?

Smelling Pink Inc. provides olfactory education, scent-based engagement programs and resources for senior living and long-term care organizations. Its work emphasizes sensory awareness, reminiscence, personal connection and staff education.

Discover Smelling Pink’s Olfactive Science Programs

Could understanding the sense of smell change how we approach aging and care?

Tracy Pepe and Smelling Pink Inc. are working to make olfactory awareness part of a broader conversation about sensory health, quality of life and meaningful engagement.

If you represent a long-term care home, retirement community, senior living organization or health-care institution, discover how olfactive education may complement your existing programs.

Explore Smelling Pink’s Olfactive Science Programs

Request Information About Staff Training and Scent Engagement

Learn More About the My Nose Initiative

Related Articles and Resources

Continue exploring the science and significance of smell:

• Tracy Pepe: Canada’s Leader in Olfactive Science, Innovation & Dementia Care
• Parkinson’s Imaging vs Scent Therapy: A Practical Debate
• Why Ingredient Quality Matters in Scent Therapy
• Scent Therapy: How Do You Do It as a Family Caregiver?
• Boost Memory and Brain Health Naturally with Scent while you sleep

About the Author: Tracy Pepe

Tracy Pepe — Perfumer, Author, TEDx Speaker and Founder of Smelling Pink Inc.

With more than 35 years of professional experience in perfumery and scent development, Tracy Pepe has dedicated her career to understanding how aromas influence human experience.

She is the author of Why the Nose, founder of Smelling Pink Inc. and creator of the My Nose Initiative, a nonprofit initiative advocating for greater awareness of the sense of smell.

Through educational programs, public speaking, research-informed advocacy and collaboration with the senior care industry, Pepe is helping expand the conversation around olfactive science and its potential applications in aging and quality of life.

Her mission is to encourage individuals and institutions to recognize the significance of a sense that is too often overlooked.

Smelling Pink Inc. | Advancing Olfactive Awareness, Education and Engagement

Scientific Reference

Olfaction: From the Nose to the Brain — scientific review of olfactory receptors, neural signal transduction and odour perception.

https://pmc.ncbi.nlm.nih.gov/articles/PMC7052838/