The wintergreen perfume note is a cool, sweet, slightly medicinal smell modelled on the leaf oil of Gaultheria procumbens, a small North American plant. That oil is almost entirely one molecule, methyl salicylate. So the note is both a botanical name and, in practice, a single aroma molecule; the word in a note list does not prove the plant's oil is in the formula.
What is wintergreen: the plant and its oil
In the GBIF backbone taxonomy, Gaultheria procumbens is an accepted species in the heath family, Ericaceae (GBIF record). It is a low, creeping plant with glossy oval leaves that stay green through winter, and red berries; the names wintergreen, teaberry and checkerberry come from this.
The "wintergreen oil" of perfumery and flavouring is the plant's essential oil. In their review of published research, Michel and Olszewska (2024) note that more than 130 volatile compounds have been reported in the oil, yet methyl salicylate dominates at 96.9–100% (review). Smelling wintergreen oil is, to a large degree, smelling one molecule.
One molecule: methyl salicylate
Methyl salicylate is a salicylate related to aspirin. The U.S. National Library of Medicine's MedlinePlus encyclopedia describes it as a chemical that smells like wintergreen, used in deep-heating creams for sore muscles and joints, vaporiser solutions and mouthwash (MedlinePlus).
This matters for reading the note. If a perfume lists "wintergreen", the perfumer may have used the natural oil or methyl salicylate directly; in smell the two are very close, and the note name does not say which. It is a clear case of the rule that a note name is not an ingredient list.
Why it smells like liniment and candy
Wintergreen feels familiar to many people because the same smell turns up in everyday products. Its use in muscle rubs and oral-care products explains why the note is often called "medicinal" or "like liniment". In North America wintergreen is also a well-known candy and chewing-gum flavour, so people there may read the same smell as sweet and playful. This is a sensory and cultural description: whether you smell "medicine" or "sweets" depends on where you first met it.
The smell itself is usually described as cool, sweet, slightly fruity and sharp. Its coolness is not the cold sensation of menthol; wintergreen gives a rounder, more sugary freshness.
Wintergreen vs mint vs birch
Mint. The mint note is mostly recognised by the fresh, cooling effect of menthol and menthone. Wintergreen comes from a different molecule; both get called "cool", but side by side mint smells more herbal and dry, wintergreen sweeter and more medicinal.
Birch. In perfumery, birch usually means birch tar, a heat-processed, smoky, leathery material. Do not confuse it with wintergreen's cool sweetness. Both may sit in one formula, but they are not the same material.
How perfumers can use wintergreen
Because methyl salicylate is strong and instantly recognisable, it can stand out even at low doses. It can be considered for a cool, sweet sparkle in aromatic, green and fougère-leaning compositions; overdosed, the scent easily tips into muscle rub. That is a dosing decision the perfumer makes product by product, and this article makes no claim about any specific formula.
To pick out wintergreen in a perfume, notice whether the coolness of the opening is "cold" like menthol or sweet and balm-like.
Measured details about the plant and its oil
Michel and Olszewska (2024) describe Gaultheria procumbens as a prostrate, creeping shrub up to 20 cm tall that prefers acidic soils, spreads quickly by stolons and is grown as a frost-hardy ornamental in Europe (review). The same review reports essential-oil contents of 1.30% of dry weight in leaves and 2.68% in fruits.
One detail in that review concerns naming. In the genus Gaultheria, with more than 150 species, other species' oils are similarly high in methyl salicylate, so all of them are called "wintergreen oil" whichever species or organ they are distilled from (review). The label "wintergreen oil" therefore does not even pin down one species. Nor is methyl salicylate present only in free form: the review reports glycosides such as gaultherin as the main polyphenol group in leaf and fruit extracts. These water-soluble, non-volatile compounds belong to the plant's chemistry rather than to the smell. Chemical analysis of the oil, it adds, goes back to the second half of the 19th century.
How to recognise it on paper and skin
Because the smell of methyl salicylate is familiar from everyday products, note your very first association: ointment, sweets or toothpaste? That personal association shapes how the note reads to you in a perfume. Tried next to mint on a paper strip, the difference becomes clearer; ask whether the coolness is sweet and round, or dry and herbal. A note list alone tells you nothing about dose, source or how long the effect lasts.
Why the neat oil gets its own warning
Sidlak and colleagues (2025) write that all salicylate forms, methyl salicylate included, are converted to salicylate in the body, and that early symptoms after a large ingestion can include nausea, vomiting and abdominal pain, with tinnitus also possible (review). They add that topical products rarely cause severe toxicity, though excessive use raises the risk. Michel and Olszewska (2024) likewise report that poisonings usually followed oral ingestion, especially by children, or absorption of higher doses through the skin (review).
There are individual records on the skin side too: Franceschi and colleagues (2022) published the first case report of allergic contact dermatitis from wintergreen essential oil (case). One case says nothing about frequency and nothing about a finished perfume, but it is reason enough not to apply the neat oil undiluted to skin. If someone may have swallowed it, call a poison helpline or emergency services without delay.
Safety: wintergreen oil is not harmless
Neat wintergreen oil and methyl salicylate are not the same as a diluted note in a perfume. MedlinePlus states that methyl salicylate can be poisonous in large amounts and is the most toxic form of salicylate, and advises calling emergency services or a poison helpline if it is swallowed (MedlinePlus). Michel and Olszewska (2024) also stress that most data on the oil's biological effects come from laboratory studies, and that clinical studies on dosing and toxicology are lacking (review).
In practice: do not swallow the neat oil, keep it out of children's reach, and do not use it as a home pain remedy. None of this says anything, for or against, about the safety of a finished perfume; it only marks the raw oil as a separate risk.
