Does Initio Side Effect contain vanilla?

Initio's own description twice describes the fragrance in terms of vanilla, including 'the leathery, animal, and woody facets of the Vanilla Bean'. But vanilla does not appear in the Main Notes field, which lists cinnamon, rum, tobacco, saffron, sandalwood and hedione. The house says one thing in its prose and another in its notes list.

Hedione is a trade name for methyl dihydrojasmonate, a synthetic aroma molecule with a soft, transparent, jasmine-adjacent smell. It is one of the most widely used materials in modern perfumery. Listing it as a note is unusual — most houses name botanicals and keep the molecules on the ingredients label.

Does Side Effect actually affect attraction?

Initio claims an effect. Its Carnal Blends collection copy describes hedione as 'a molecule known to stimulate the brain's pleasure and libido pathways' and 'a neuroactive trigger', and the house says it makes 'functional fragrances with scientifically measurable effects'. Those are the house's claims, quoted. We have not verified them and do not repeat them as fact.

Sentia

Initio · Side Effect · EDP

Initio Side Effect notes

Reviewed by Lucy Grant, co-owner and fragrance reviewer — 4 September 2026

What notes are in Initio Side Effect?

Initio lists six main notes for Side Effect: cinnamon, rum, tobacco, saffron, sandalwood and hedione. The house publishes no top, heart or base pyramid — just that flat list.

No pyramid. Initio publishes a flat list labelled 'Main Notes', with no top, heart or base.
Vanilla is not on the list. The product description names it twice; the notes field omits it.
Hedione is a molecule, not a botanical. Its INCI name is methyl dihydrojasmonate.
It is an Eau de Parfum. Sold in 50ml and 90ml, made in France.

Log each wear in Sentia and see what a $290 bottle costs per day worn.

The notes

The six, as the house lists them

Cinnamon
Rum
Tobacco
Saffron
Sandalwood
Hedione

Musk & leather2
Spice2
Sweet1
Wood1

Six notes, sorted by us into the families they belong to. With no pyramid to lean on this is the closest thing to a shape Initio gives you — though it counts names on a list, and says nothing about how much of each is in the bottle.

Most houses publish a pyramid — what you smell first, what develops, what stays. Initio does not. Its product page has a single field labelled “Main Notes” containing those six words and nothing else. There is no top, no heart, no base.

Transcribed from Initio’s product page, 4 September 2026, identical on their international site.

The disagreement

The vanilla that is not there

Read the same page’s description and you meet a different fragrance. It calls Side Effect a blend of tobacco, vanilla, rum and cinnamon, and later describes “the leathery, animal, and woody facets of the Vanilla Bean.”

Vanilla appears twice in that prose and not once in the notes list. Saffron and sandalwood do the opposite — listed as notes, never mentioned in the description. Both texts are on the same page, published by the same house.

This is worth knowing before you buy from a list. Retailers pick whichever version they found: one authorised stockist lists coffee, a note that appears nowhere in Initio’s own copy at all.

Hedione is not a plant

Five of the six notes are things you could point at. The sixth is a laboratory material. Hedione is a trade name for methyl dihydrojasmonate, a synthetic molecule that smells soft and transparent, somewhere near jasmine, and is used in an enormous share of modern perfume.

Listing it as a note is a deliberate choice. Most houses name botanicals and leave the molecules to the ingredients label. Initio puts it in the shop window.

Claims

What Initio claims, and what we can confirm

Side Effect belongs to Initio’s Carnal Blends collection, whose copy describes hedione as “a molecule known to stimulate the brain’s pleasure and libido pathways” and “a neuroactive trigger”. Elsewhere the house says it makes “functional fragrances with scientifically measurable effects.”

Those are quotations, not findings. We have not verified them, and we are not repeating them as fact. What we can confirm is narrower and duller: hedione is a real and very common perfumery material, Initio lists it among six notes, and the house says it uses a lot of it.

Does it earn its place?

Side Effect is $290 for 50ml. At that price the question stops being what it smells of and becomes how often you reach for it. Add what you paid, tap the days you wear it, and Sentia divides one by the other: the cost of each wear, lower every time.

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Questions

Still wondering

Does Initio Side Effect contain vanilla?: Initio's own description twice describes the fragrance in terms of vanilla, including 'the leathery, animal, and woody facets of the Vanilla Bean'. But vanilla does not appear in the Main Notes field, which lists cinnamon, rum, tobacco, saffron, sandalwood and hedione. The house says one thing in its prose and another in its notes list.
What is hedione?: Hedione is a trade name for methyl dihydrojasmonate, a synthetic aroma molecule with a soft, transparent, jasmine-adjacent smell. It is one of the most widely used materials in modern perfumery. Listing it as a note is unusual — most houses name botanicals and keep the molecules on the ingredients label.
Does Side Effect actually affect attraction?: Initio claims an effect. Its Carnal Blends collection copy describes hedione as 'a molecule known to stimulate the brain's pleasure and libido pathways' and 'a neuroactive trigger', and the house says it makes 'functional fragrances with scientifically measurable effects'. Those are the house's claims, quoted. We have not verified them and do not repeat them as fact.

Find Side Effect under Initio Parfums Privés in Sentia’s catalogue and add it to your shelf from there.