Most opened skincare is good for six to twelve months — look for the small open-jar icon on the packaging with a number like "12M" printed inside it, which tells you the Period After Opening. Sunscreen is different again: it has its own use-by date, and it genuinely matters because the actives break down.
General information, not medical advice — always check with your GP, midwife or pharmacist about your own skin and any product you're unsure of.
Where to actually find the expiry
Look for a small jar icon with a lid, usually on the base or side of the packaging, with a number and "M" inside — that's how many months the product is good for once opened, not from the day it was manufactured. No symbol at all usually means a general rule of twelve months for most water-based products is a safe assumption.
What goes off fastest
Vitamin C serums are the first to turn — a fresh one is usually pale, and it'll shift towards a darker orange or brown as it oxidises, along with losing potency. Anything with natural oils or plant extracts and no synthetic preservative system also has a shorter life once opened. Sunscreen and SPF-containing moisturisers should be treated strictly — an expired one may simply not protect you the way the label promises.
Signs a product has turned
Trust your senses here. A change in smell — sour, sharp, or just "off" compared to when you bought it — is the clearest sign. So is a change in texture or colour, or the product separating and not mixing back together when you shake it. If in doubt, don't use it on your face, especially anywhere near your eyes.
Why this matters more with a newborn in the house
Bathrooms get hot and humid — showers, a baby bath running, the heater on all winter. Heat and humidity both speed up how fast products break down, so a serum that would have lasted the full twelve months in a cool, dry cupboard might not if it's sitting on a steamy shelf. Storing your actives somewhere cooler and drier, even just a drawer instead of an open shelf, buys you real time. Sheet masks are worth a mention here too — the honest cadence guide covers how long an opened pack is really good for.
If you're buying Korean skincare in Australia and wondering how stock turnover affects freshness, I've covered why local stock matters here.
Questions mums ask
Does unopened skincare expire?
Eventually, yes, though it lasts much longer unopened — most brands print a manufacture batch code you can look up, and a general rule of two to three years unopened is reasonable for most products.
Is it safe to use an expired moisturiser if it still looks and smells fine?
Probably, for a plain moisturiser with no strong actives — but treat sunscreen and vitamin C more strictly, as their performance quietly drops even before anything looks wrong.
Should I write the opening date on my products?
It's a genuinely useful habit — a bit of masking tape and a date in permanent marker on the base takes ten seconds and saves you guessing months later.
Where to start
If it's time for a proper refresh, The 4-Minute Ritual ($188) gets your everyday shelf back to the essentials. If you're after that dewy, multi-step finish, The 5-Step Glass-Skin Routine ($165) is the other place to start. Both are on alinabeauty.com.au.
Edwina x
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