Recommended Reading: The Forgotten Sense by Jonas Olofsson

Interview with scientist Jonas Olofsson, author of The Forgotten Sense

There are many things one can say about The Forgotten Sense: The New Science of Smell—and the Extraordinary Power of the Nose by Jonas Olofsson. Exemplary is the first word that comes to mind as books written by academics don't always resonate with the public; no matter how remotely curious readers are about a particular subject, or how devoted the author is to sharing the latest information about a subject they deeply care about that resonates with others. 

Olofsson cares about the sense of smell and how smell loss has and continues to have an effect on patients who didn't find the support they needed when COVID-19 anosmia took hold in the first wave of the coronavirus pandemic. It's why he wrote the book, but there's more. Smell loss isn't new, but the number of people suffering from anosmia (whether they've recovered or not) is more widely acknowledged due to the pandemic and ensuing variants. It's a silver lining.

This silver lining is entwined with the fact that Olofsson has interest and compassion in amounts that exceed the boundaries of his native Sweden. This is reflected in the book's contents and the informed, conversational tone of the book, which draws the reader in like a good friend. The author bridges research (psychology, neurology and other disciplines) while bringing the reader up to date with regard to what is known about the sense of smell as it relates to health, quality of life and society.

I purchased The Forgotten Sense shortly after it was released in January 2025 (and plan on reading it again after I finish Sun City by Tove Jansson). The reason for the re-read is that books like The Forgotten Sense are rare when it comes to non-fiction books about the sense of smell, and that's as good a reason as any to recommend it on Glass Petal Smoke. Attendees at Smell & Tell: Get Inside Your Olfactory Mind will learn more about The Forgotten Sense at the Ann Arbor District Library on Tuesday, March 11, 2025, where I'll also introduce an analog smelling device called the Smell Rolodex. Ah, smell life...

Notes & Curiosities:

I discovered the video that accompanies this post after finishing The Forgotten Sense. It's a great way to get acquainted with the author, his research and the book. To learn more about Jonas Olofsson's research, visit Google Scholar and the website for the Sensory Cognition Interactive Laboratory, where Olofsson is Principal Investigator.

Are you a non-scientist that wants to master reading articles in scientific journals? The best way to engage with journal articles is to use naiveté as fuel for critical thinking. "How to Make Sense of a Scientific Journal Article" is an interactive tool that lists the components of a science journal article and explains their function/purpose. Simply click on each component (Overview/Abstract and Main Sections, Methods,

Results, Discussion/Conclusion, and References) and scroll down to read the contents and learn more. This resource is part of the Know the Science initiative. 

Peter Sellers as Inspector Clouseau
via Encyclopedia Britannica

An informal, but effective approach to reading articles in scientific journals is a little something I cooked up called Clouseau It!, an homage to Peter Sellers in his role as Inspector Clouseau in Pink Panther films. Apply the following seven steps once you're comfortable reading articles in scientific journals:

Step 1: Investigate the Paper 

Step 2: Interrogate the Study

Step 3: Treat the Paper Like a Suspect

Step 4: Question the Method Used by Researchers 

Step 5: Confirm the Motives Based on Funding 

            (Conflict of Interest)

Step 6: Evaluate the Outcome in Relationship to the 

            Conclusion

Step 7: Look out for Cato Fong

Anatomy of a Tic Tac Orange Mint

The orange flavor of Tic Tac Orange Mints unfolds like the experience of eating an orange out of hand. Flavor chemists want you to think of the real thing even if the candy doesn't have the same form factor as orange fruit. The result? Candy plays pretend, and our brain consciously plays right along with it because candy tastes good, inspires memories and is fun to eat.

Mass-produced candy ensures a specific eating experience every time and that's by design. Candy is a form of comfort and reward across cultures. When you eat candy, you expect it to taste exactly like you remember it. The everyday chaos of adult life is sublimated by candy's constancy. Add a few childhood memories and it's easy to get hooked on candy when you’re decades past being a kid.

The flavor chemistry in Tic Tac Orange Mints is an industry secret, but if you read the ingredient list you can do a bit of flavor sleuthing and decode what you sense, but can't see. Orange Tic Tacs contain: sugar, maltodextrin, tartaric acid, natural and artificial flavors, rice starch, gum arabic, magnesium stearate, ascorbic acid, Yellow 6 and carnauba wax. So, what does this mean? A sweet and sour profile at a quick glance, but there's more.

The first ingredient is sugar (sucrose) and that means sugar is used in the greatest quantity compared to ingredients that follow it on the ingredient list. Sugar is followed by maltodextrin, a polysaccharide that improves texture, taste and shelf life. Maltodextrin isn't sweet on its own. Amylase, an enzyme found in saliva, breaks down maltodextrin, which is absorbed by the body as glucose.  

The next ingredient, tartaric acid, is found in grapes, bananas, tamarind, citrus fruits and wine. Tartaric acid's salt is potassium bitartrate, aka cream of tartar, which can be mixed with sodium bicarbonate to make baking powder. Congratulations! You've entered the realm of food science by investigating a candy ingredient list. 

Pour yourself a glass of wine and congratulate yourself as you toast the wonders of tartaric acid! You've graduated from Sweet Tarts, Fun Dip and Smarties Candy Necklaces, all of which include a combination of malic acid and tartaric acid to create delightful puckering effects that turned you into a candy lover in the first place.

Natural and artificial flavors cited in the ingredient list for Tic Tac Orange Mints are just that. Specific molecular constituents used to shape the candy's unique taste and flavor are akin to a family recipe for pasta sauce. Family members who know the recipe pass it down from one generation to the next. In the food industry, proprietary knowledge and trade secrets are protected by legal and binding non-disclosure agreements. You don’t share them with anyone (it’s a “take-it-to-the-grave” kind of thing).

Ingredients used to flavor candy are natural, "nature-identical", and/or synthetic. Chemical compounds and single molecules that scream "oranges" and those that support the chemistry of orange flavor define a Tic Tac "orange" experience. An example of a supporting ingredient in orange flavor would be a material with a zesty green aroma associated with orange peel.

Gum arabic is ubiquitous as far as food applications go. It’s added to confectionary glazes and is also used as a probiotic. Rice starch smoothes the surface of candy coatings and has additional applications as well. Magnesium stearate, on the other hand, prevents ingredients from sticking to mechanical equipment in the manufacturing process. It's commonly used as a lubricant for tablets. 

Ascorbic acid is also on the Tic Tac Orange Mints ingredient list. You may recognize it if you've read the ingredients label on a bottle of vitamins because ascorbic acid is another name for vitamin C. This doesn't mean that Tic Tac Orange Mints are vitamins, so you can't use this fact to make candy guilt go away or use Tic Tac Orange Mints to raise Linus Pauling from the dead.

Yellow 6 is also known as "sunset yellow" in the language of artificial food colors. Artificial colors are shelf stable (they don't lose their color quickly over time and under the proper storing conditions). This could change as companies like Kalsec, which specializes in natural food color technology, offer stable natural color alternatives.

It's interesting to note that Orange Tic Tac Mints sold outside the U.S. are colorless (they're white) due to rules and regulations related to artificial food coloring. In Canada, for instance, Tic Tac Orange Mints are packed in a plastic container that's tinted orange to signal flavor expectations in the absence of Yellow 6 food coloring.

Carnauba wax (Copernicia cerifera) is the last ingredient in Orange Tic Tac Mints and it's typically used as a coating or glazing ingredient. It's also one of the first ingredients you'll encounter in a store-bought orange (before you get to the cash register where Tic Tacs galore are staring you in the face). Carnauba wax is used in a proprietary form of artificial fruit wax that coats and protects fruit that's packaged and shipped to grocery stores. 

Now that you know the story behind the ingredients in Orange Tic Tac Mints, it's time to do a little sensory evaluation on your own. The experience will tell you a lot about what flavorists do without saying a word. To get the most out of this or any other tasting exercise, make sure you take your time.

If you do the exercise quickly, you'll miss important flavor transitions that define signature candy tasting experiences. Bear in mind that flavor is defined as the intersection between taste and smell. If you are rushing or distracted, you risk having a one-dimensional experience that’s mostly focused on taste (sweet, sour, salty, bitter, and savory).

Go somewhere where you can taste the candy without distraction. The experience goes beyond "sweet, sour, done, now give me another one". Pop a single orange Tic Tac in your mouth and savor it, noticing the sequence of sensations from beginning to end. Do this twice. Once for the ah-ha moment(s) and a second time to embed the experience in your brain as a reference point for future candy tastings. Writing down sensory impressions after the second tasting is a good idea.

Sensory evaluation requires focusing on sensations and memories inspired by the tasting experience. Imagine what chemistry class would’ve been like if sensory evaluation exercises were included in the curriculum. You wouldn't be reading this. You'd be a flavorist working at a lab bench creating flavors for candy. 

Mindfully tasting Tic Tac Orange Mints is akin to a candy-version of an orange from a flavor perspective. A sense of ephemerality sets in when you’re finished, but you can always taste another candy. Is eating orange fruit better than eating candy? Yes, but if you’re hankering for the perfect portion-controlled sweet, candy allows you to connect with flavor and memories, and there’s nothing wrong with that if you indulge in moderation.

Notes & Curiosities: 

 The acid in citrus fruit causes the mouth to water. The same response occurs when 

  you eat something that smells appetizing and tastes delicious. Common descriptors

   for orange fruit flavor are: acidic, citrusy, fragrant, fruity, sweet, tangy and zesty

Tic Tac Orange Mints were launched by Ferrero in 1974. The original Tic Tac mint was called "Refreshing Mints" in 1969 and was changed to "Tic Tac Fresh Mint" in 1970. 

Tic Tacs have nothing to do with the paper and pencil game called tic-tac-toe that's played in a three-by-three grid with "x" and "o" marks. The sound made by the candy as it rattles in the container inspired Tic Tac's onomatopoetic name.  

There is no mint flavor in Tic Tac Orange Mints (though there's a green nuance that is more leafy than minty that shows up in the first half of the tasting experience). The term “mint” is used as an indicator of something a person eats for refreshment and/or mint-flavored mints.

Mindfully eating Tic Tac Orange Mints can be included in chemistry curriculum so that students grow up to be adults with a métier in flavor science.  More information on becoming a flavorist (and/or flavor chemist) is available from the Society of Flavor Chemists. 

If you're curious about the flavor industry read The Flavor Industry: From 1945-1995. This link takes you to the PDF download on the Society of Flavor Chemists website. The publication was put together by the American Sources Association on behalf of the Society of Flavor Chemists. 

Ethyl Maltol Goes to a Cocktail Party

Welcome to chemical anthropomorphism, where Ethyl Maltol attends a

cocktail party, meets a candy bar, and tries to help cousin Maltol make 

friends. Spritz your favorite gourmand fragrance and join the party. Best

read whilst eating cotton candy, caramels or a hearty slice of bread.

Ethyl Maltol Goes to a Cocktail Party 

By Michelle Krell Kydd

Cotton candy pink

Pantone 9 2 8 6 "C", 

not exactly a taste trigger. 

Let's start over again,

shall we?

Oh really, just call me 

by my true name. 

I’m Ethyl Maltol. 

How do you do? 

Dentist, hmm. 

Do you remember

the "cavity creeps" in 

the Crest toothpaste commercial?

No matter how many times 

they said "we make holes in teeth" 

it never stopped me 

from eating candy in the 70s.

So, you want to know 

my family name? 

I'm a Pyranone. 

Nuanced, yes, I admit it. 

Not that my ancestors 

had anything to do 

with The Inquisition, 

but the name does possess 

the mischief of fire in it. 

Don't worry, I don't smoke 

or keep matches on my person. 

How about you? 

Oh really? 

You’re kidding. 

Really? 

Now that’s a twist. 

You’re a Caramello, 

how sweet. 

A pleasure to meet you. 

Mother was a chemist, 

which explains my name.

If you look it up, 

you’ll see a string of descriptors. 

Sugar, sweet, caramel, jammy 

with a strawberry-like aroma 

redolent of cotton candy.

Yes, that’s me, 

C7H8O3 formally.

A circus, fairground or

seaside boardwalk memory. 

Pick one, two or all three, 

but don’t get your hopes up 

Caramello, 

as we might be related.

The fact you've heard 

about my cousin Maltol 

means we can at least be friends. 

Maltol was named by 

my uncle, mother's brother,

who's also a chemist.

It was mother who gave me

my first lesson

on maltol synonymy;  

"sweet, fruity and caramellic, 

with a hint of 

strawberry and pineapple." 

I oh, none of this makes sense 

unless you remember 

the sweet dry vanilla scent 

of late autumn pine needles

that carpet forest floors.

It’s a distinct aroma 

that replaces the

green coniferous smells 

of spring and summer,

an infrathin between autumn

and the first winter snow.

Did you know that

maltol got its name 

from the smell of roasted malt? 

In our family the metaphor

is even richer than that.

Cousin Maltol's maternal ancestors 

were brewers and bakers. 

Close your eyes, Caramello,

and imagine the smell 

of loaves of bread 

growing golden brown 

in a large oven. 

Now, add another layer of smells 

and picture barley slowly roasting,

heat caramelizing the grains

making genies of smells 

that make children of us all

to the point of forgetting 

that there’s more time behind us 

then there is in front of us, 

as we grow old 

and are slowly betrayed 

by bittersweet strands 

of our own molecules. 

Maltol says it’s why he can’t say no 

to bread, beer or single malt scotch. 

It's also why he collects rare

and obscure conifer essences,

and swears by Siberian larch.

That's a fine-looking glass

of scotch he's enjoying.

You can tell by the 

tulip-shaped glass. 

Shall we join him?

You can ask him about

his curious scent collection.

Just be sure to mention

that I told you about it,

if, and only if, the timing is right.

He's rather sensitive about it.

You'll know that he trusts you

if he shares a carefully folded copy

of a magazine article on pine trees

that he keeps inside his wallet.

He makes a new copy

every few months or so,

as the creases tend to tear.

The article was published

on September 1st 1959, 

which happens to be his birthday.

Sometimes, he jokes and

says it’s his birth certificate.

Notes & Curiosities

Image Credit: Candy-Floss Coneheads via Ylvers on Pixabay.

Inspiration for this post includes, but is not limited to: the poems of James Schuyler; chemistry; an article in The Atlantic by Nicholas T. Mirtov (September 1, 1959); and a description of a cotton candy smellscape in Joe Hill’s “Dark Carousel,” a short story that appears in Throttle. 

The air was redolent with the cloying perfume of cotton candy, an odor that doesn’t exist in nature and can only be described as 'pink' smell. 

Sugar used to make cotton candy is subject to heat and spun into filaments that are collected on a stick-like paper cone. Modern cotton candy, unlike the original version which looked like a white cloud, is enhanced with flavor-color blends. The smell of warm, spun sugar complemented by artificial flavors and colors shapes flavor expectations and smellscapes. 

Pink vanilla (Silly Nilly) and blue raspberry (Boo-Blue) flavors were created by Gold Medal Products Corporation. (They perfected American cotton candy machines with the inclusion of a sprung base in 1949.) The two historic flavors are archetypal and haven't lost their charm. 

The 2022 version of the Material Safety and Data Sheet (MSDS) for "Silly Nilly Flossugar" lists vanillin and artificial flavors in the ingredient list. Artificial flavors combined with vanillin aren't identified as they're proprietary. For the record, common ingredients used in various brands of pink cotton candy flavor include, but aren't limited to: ethyl maltol, ethyl vanillin, vanillin and furaneol. 

Knowing the identity and aromatic profile of a compound doesn't tell you how ingredients in combination behave with one another. This is where things get sticky for curious fans of cotton candy who aren't flavor chemists. Vignon's profile for nature-identical Strawberry furanone (aka furaneol) shows how versatile a single ingredient can be in flavors and fragrances, which clarifies a few things. 

The role of flavor enhancers in cotton candy can't be underestimated. They play a supporting role by amplifying what's already there. Maltol was isolated from the bark of larch trees and pine needles before it was synthesized in 1947.  Ethyl maltol was produced synthetically after chemists figured out how to synthesize maltol. Both materials enhance flavor and fragrance formulas. 

The application of ethyl maltol in perfumery began with Angel by Thierry Mugler (1992). On the flavor side, ethyl maltol enhances caramel flavor in confectionary. The aroma profile of ethyl maltol and maltol are in the poem that accompanies this post. 

Falco Riot and Octyl Fora Go Missing

Falco Riot, creator of Octyl Fora perfume, described the effect of his fragrant creation with a stale, twentieth century trope, “with Octyl Fora you're transformed into a living philter.” 

When questioned about the ingredients used in the AI-generated fragrance, Riot exhaled an aloof sigh, detaching himself from the question with another query in an attempt to appear avant-garde.

 “We're all made of memory and metaphor, wouldn't you say?” 

Eight months later, everyone who attended the Octyl Fora fragrance launch went missing, including Riot. Ten drums containing Octyl Fora concentrate, stored in an obscure warehouse district in the city, also disappeared. 

The team responsible for collecting evidence cracked the numeric code on the warehouse door. The numbers spelled “it smells" using an A1Z26 cipher. 9*20*19*13*5*12*12*19.

They should have known better. The code wasn’t a barrier; it was an invitation. 

Investigators examined surfaces in the empty, temperature-controlled room where drums of fragrance concentrate were stored. Handheld sensors analyzed walls, floors, cabinets and doors. 

Each device lost power after four attempts to read a surface. None of them detected an unusual compound before they stopped working. 

Clary Otafo, who'd worked with the team for 10 years, looked at his colleagues and rolled his eyes. 

“Emperor's new clothes, eh?” 

His eyes kept rolling. A low hiss escaped between his teeth. He fell to the floor and stopped breathing. A translucent vapor rose up from the floor and outlined his body like a chalk mark.

Ray Focolt, the youngest member of the team, closed the warehouse door as his colleagues fled ahead of him. The knob was ice-cold and stuck to his palm before the latch bolt released, and he could relax his grip. 

By the time he got into his car, Focolt barely remembered moving one foot in front of the other to get there. That’s when he noticed a strange feeling in his right hand, the same hand that closed the warehouse door. 

The skin of his palm was slightly raised in a quarter-shaped circle at the center. In the middle of the circle there was a line drawing of a nose. An angled slash ran through it. 

Focolt blinked a few times and looked at his palm in disbelief. 

The car seat next to him sank in the center. The impression was punctuated by a decompressing squeak of leather. Focolt was too busy looking at his hand to notice.

The image on his palm faded into itself and shimmered as it disappeared. He was about to start the car when he sensed someone breathing next to him.

“I know you can’t smell, Ray.” 

“What the hell?!” 

The radio turned on. Digital numbers veered left of the dial and stopped at the sound of John Lennon’s voice: 

 

We're playing those mind games together,

Pushing the barrier, planting seed. 

Playing the mind guerrilla,

Catching the mantra "peace on earth".

We all been playing those mind games forever, 

Some kind of Druid dude, lifting the veil. 

Doing the mind guerrilla, 

Some call it magic, the search for the grail. 

The radio went silent at “grail” as the passenger side door opened with a slow deliberate creak.

“Until we meet again, Ray. I have a little something to tell you.” 

Focolt shut the door, turned on the ignition, and sped off. He never got ticketed for running four red lights in a row on his way home. He didn’t get much sleep that night either.

Notes & Curiosities:

Artificial intelligence and perfumery were explored in a 2014 post titled "The Unstoppered Bottle of Perfume". "Falco Riot and Octyl Fora Go Missing" is infused with a 2024 ethos and hints of science fiction. The story is an intentional fragment. I'm formulating a scent to go along with it for a future Smell & Tell program at the Ann Arbor District Library. 

There are non-fictive elements in "Falco Riot and Octyl Fora Go Missing," one of which is the use of handheld sensors. They exist in real life and are rapidly improving. Portable spectroscopy allows samples to be taken in the field versus the lab. Curious? Get all the nerdy details here.