In 12 years of work as a perfume chemist and consultant in niche perfumery, I have conducted over 3,000 fragrance tests on different people. The same bottle of perfume can smell like a luxurious blooming garden on one person’s skin or… a dull medicine cabinet on another’s. This is not marketing, but science. Let’s explore why your sense of smell is a unique genetic code, not a whim.

1. Genetics: Your «Olfactory Passport»

The numbers don’t lie: Research confirms that 30-50% of people cannot perceive benzyl salicylate (a key component of jasmine notes), and 25-30% cannot perceive galaxolide (the base of musky accords). Sensitivity to ambroxan and ambriluxe (the base of amber perfumes) is less commonly lacking.

«The diversity of our olfactory receptors is a biological lottery that determines the uniqueness of each person’s perception of the world of smells.»
— Nobel laureate Richard Axel, who discovered the genetic mechanism of odor receptors

Depth of the problem: Humans have approximately 855-1000 genes that encode olfactory receptors, but almost half are nonfunctional due to mutations.This creates your personal «blind» profile.

Personal case: In the project for brand X, we encountered that 40% of the focus group associated the perfume with timberol notes (a woody accord) with a «bleach» smell. The cause is the OR7D4 gene, variations of which distort perception.

2. Physiology: The Skin as a Chemical Laboratory

pH and temperature — drivers of sound: Dr. A. Silver (Institute of Skin Chemistry, Berlin) proved that the acidity of the skin (pH 4.5–5.9) and its temperature (on average 33°C, but variable) catalyze reactions between perfume molecules and skin sebum.

• Warm skin (+1-2°C above normal) accelerates the evaporation of top notes, enhancing vanilla or musk.
• Cold skin «freezes» citrus fruits, making them sharper^{[VC.ru, Pravda.ru]}

Microbiome — the hidden player: Your unique set of skin bacteria (10)microorganisms/cm²) metabolize aromatic molecules.

A study by the University of Tokyo (2022) involving 500 volunteers showed that people with a dominance of Corynebacterium had a final perfume note that was 23% «earthier» than predicted.

3. Brain: Where smell becomes emotion

Neurobiology of two stages: Japanese Scientists Have Recorded: The Brain Processes Smell in 2 Stages

1. Objective identification (40-100 ms): Gamma waves («This is a rose»)
2. Subjective assessment (100-500 ms): Theta waves determine whether you like this scent.

“The brain completes the picture based on memory. If the first kiss was among lilacs, their scent will always be ‘sweet,’ even if it is not.”
— Professor K. Mori (University of Tokyo)

4. Trends: What Will Change Personal Perfumery

Genomic testing

Laboratories such as Genotek and Genokarta already offer to identify your genes associated with insensitivity to anthranilate. The cost of the service is from 150 euros.

Olfactory training

Methodology: Daily inhalation of 4 essential oils (rose, lemon, eucalyptus, clove) for 20 seconds each morning and evening.

Important: Detection of parosmia (perceiving sweetness as sour) has become a biomarker for diagnosing early stages of Parkinson’s or Alzheimer’s disease.Requires consultation with a neurologist!

The conclusion is not an opinion, but a fact:

Your perception of a fragrance is a combination of genetics (60-70%), skin condition and microbiome (20-25%), neurophysiology (10-15%), and culture. There is no such thing as a «wrong smell» — it is your unique biochemistry.

When choosing a fragrance, listen to your skin: if it causes discomfort after 30 minutes, it’s not your perfume, and evidence-based science confirms our experience.

Sources:

• Nobel Committee (2004)
• [2] University of Tokyo (Nature, 2022)
• [3] N+1 (2017)
• [5] Naked Science (2023)
• [6] CyberLeninka (2021)
• [7][9] Genotek, Genokarta (2020-2023)
• VC.ru, Pravda.ru

Results may vary. This information does not replace medical consultation for anosmia/parosmia.