Scent and Memory: How Fragrance Can Support People With Alzheimer’s

The Science of Fragrance and Memory

While all senses can stir emotions, scent has a special capacity to unlock stored feelings and experiences. Of all the senses, smell is the most deeply intertwined with memory, and unlike sight or sound — which must travel through more complex neural pathways — the olfactory nerve, which processes smell, has very direct connections to the amygdala and hippocampus: key brain structures for memory and emotion storage.

This unique pathway allows even faint aromas to summon vivid recollections, often from decades earlier, and illustrates how scent-based cues reach further into the past than words or images. Research published in Chemical Senses found that when people with Alzheimer’s disease were exposed to familiar scents, they were able to recall more vivid and emotionally rich memories of both past and future events compared to when no scents were present. This suggests that odour cues may be particularly effective in stimulating autobiographical memory.

This is especially meaningful for individuals with Alzheimer’s disease or dementia, where recent memories fade first, but distant ones often remain accessible. In such cases, smell becomes not only a powerful trigger but also a comforting way for patients to connect with preserved memories.

A Holistic Approach

As part of a more holistic view of patient care, fragrance can help bring calm, comfort and pleasure to people living with Alzheimer’s, and olfactory stimulation has also shown promise in enhancing cognitive capacity. Loss or weakening of the sense of smell (called anosmia or hyposmia) is often one of the earliest signs of Alzheimer’s, but the extent and timing of those changes vary depending on the individual. However, even in the later stage of dementia, scent can remain a meaningful tool because of its deep connection to emotion and memory — even when scent recognition fades, the feelings they evoke can persist.

While the concept of “reminiscence therapy” using scent is relatively new and untested, it’s already being used in some hospitals and care facilities. For example, Hebrew Home at Riverdale in New York, has reportedly experimented with offering seasonal scents (such as baseball mitts or hot dogs) to stimulate reminiscence.

Why is Scent Important?

• Emotional memory is powerful. Scents are tied closely to the limbic system (emotion and memory). Familiar aromas — like a loved one’s perfume, freshly baked bread, or flowers from childhood — can trigger feelings of comfort and recognition, even if the person can’t name the smell.
• Calming effects. Aromatherapy (especially lavender, or lemon balm) is sometimes used in dementia care to reduce agitation, anxiety, or sleeplessness. Although scientific studies show very mixed results, there is anecdotal evidence to suggest it can be helpful for some patients. As with other complementary therapies, aromatherapy is not a replacement for medical treatment.
• Multi-sensory engagement. Pairing scent with other cues (for example touch, music or visuals) can strengthen connections and make activities more meaningful. For example, smelling coffee and holding a warm cup and hearing café sounds can evoke a stronger memory than smell alone.
• Quality and enhancement of life. Even if diminished, the sense of smell can still provide small moments of pleasure. Sensory activities can still be powerful, spark memories, or provide comfort and connection in combination with other sensory stimuli. For example, often when a person is unable to communicate verbally, using the senses is a great way for them to feel involved.

How You Can Support Meaningful Fragrance Moments

Families caring for loved ones or friends with Alzheimer’s can use the power of scent to create sensory-rich activities. Everyday scents such as perfume, scented soap, freshly-laundered clothes, or scented lotions can all help awaken treasured memories:

• Reminiscence therapy: Familiar scents related to a person's positive memories such as a favourite childhood activity, their mother's signature perfume, or even the smell of a past hobby such as gardening or baking can help patients feel connected. Fragrance brand Demeter—renowned for its single note, unorthodox scents—has over 300 scents including Petrichor (the pleasant, earthy smell produced when rain falls on dry soil), Dirt (the rich scent of turned earth), Grass and Log Cabin; and evocative smells such as New Baby, Christmas Tree, Earl Grey Tea, and Paperback. Maison Margiela’s fragrance brand REPLICA is also famous for its fragrances that recreate personal memories through scents: Beach Walk, By The Fireside, At The Barber’s and Jazz Club are much-loved examples.     

• Pair Scents With Soundscapes or Routines: The Alzheimer’s Society piloted a project called Scents and Sounds, which combined jars of familiar aromas with matching soundscapes. When participants experienced these multi-sensory combinations, many shared childhood memories and special moments such as the woodland walks they used to love, Jamaican rainstorms from their childhood or one patient’s father growing vegetables in their family garden. Try a similar activity using small containers or jars with familiar or evocative scents — e.g. coffee, baking spices, fresh herbs, or a favourite perfume / aftershave. Invite the patient to identify the smell, or combine smell + sound + visual images—for example, a “garden” theme: the scent of grass or flowers alongside sound of birds, or photos of gardens.
• Explore scents during sleep: research suggests that scent exposure while sleeping can improve memory and cognitive function. Explore subtle pillow mists for their relaxing and soothing properties. Jo Malone's Lavender & Moonflower, Olverum's Restful Sleep and Bamford's B Silent are all Pillow Mists worth exploring.
• Combine scent with touch and routine: apply scented lotion as part of a calming hand massage and predictable routine (before bedtime or after bathing). Appreciate the need for both dignity and consent — always respecting preferences and sensitivities.
• Bring the outdoors in: if being outside is difficult, bring small potted fragrant plants or herbs like lavender, mint, or rosemary indoors. Even just smelling fresh herbs or flowers can be soothing. Alzheimer’s UK suggests scented plant pots or herbs as ways to bring natural smells into the home.
• Create immersive environments: Consider using essential oils in a diffuser, or by adding them to a carrier oil for gentle massage. Depending on the stage of the individual’s disease and needs, combining scent with music they enjoy on a short drive can provide gentle stimulation, fresh scenery, and even exposure to familiar places that may spark pleasant memories. Many premium fragrance brands such as Diptyque, D.S & Durga and Earl of East now create room mists, scented liners, plug in room diffusers, scented ceramics and even car diffusers that work with the vehicle’s air vents to release fragrance while driving.

Top Tips

1. Choose familiar smells first: things the person has known for many years tend to be more strongly encoded.
   2. Personalisation: ask family / the person what smells they liked in their past. Lean into those.
   3. For skincare, always patch-test for skin sensitivity.
   4. For inhalation: use diffusers sparingly and avoid continuous high concentrations.
   5. Use gentle, distinct scents — subtle is better, as strong scents can be overwhelming.
   6. Go slow and simple: one scent at a time, in short sessions.
   7. Observe reactions: look for signs that the person enjoys the smell (facial expression, body language). If distressed or uncomfortable, stop.
   8. Combine with other sensory cues: visuals, sounds, touch, or even taste can help the experience, even if smell alone is weak.
   9. Consistency helps: doing things regularly (e.g. using lavender in the evening) may build associations.
   10. Ensure safety: avoid allergens and ensure essential oils are properly diluted.