Does perfume expire?

Yes, but not the way yoghurt does. There is no date after which it stops working: there is a slope that starts the day you open it, and how steep it is depends more on where you keep it than on its age.

Five clear glass perfume bottles with the juice visible, on a white background.

There is no expiry date, there is degradation

Sealed and well kept, a fragrance lasts years with no noticeable change. Once opened it starts to oxidize from the first use, because every press pushes air into the bottle.

As a rough guide, a sealed bottle kept somewhere dark and cool changes very little over years. An open one kept somewhere warm and bright changes faster. Most of that difference comes from where it lives rather than from its age.

Some tend to last longer than others

It broadly follows how volatile the raw materials are, though two fragrances from the same family can behave quite differently.

The open-jar symbol does not mean what it looks like

That icon reading 12M or 24M on the box is the PAO, the period after opening. It is a cosmetic safety indication, not a forecast of how long it will smell good.

A fragrance marked 12M does not spoil after twelve months. Plenty are perfect years later; the symbol is saying something else entirely.

How to tell whether yours has gone

Wear it and wait. The test is in the first few minutes, not in how the bottle smells.

And one sign that misleads a lot of people: a darker color is not enough. Juices with vanilla, amber or resins darken naturally over time and still smell exactly as they should. Color alone decides nothing; the smell does.

What actually shortens a bottle's life

Light, heat and air — the same three the storage guide is about. Age on its own does far less than any of them.

Leaving a bottle unopened does not damage it. A bottle you never open is simply a bottle you never get to enjoy, which is a different problem and a nicer one to solve.

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