We can't decode Duolab's batch format yet — you still get the official shelf-life guidance and simple self-checks below.
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On real Duolab packaging (made by L’Occitane International SA) — green is the code, red is not (the barcode, article number or open-jar symbol):
The Duolab batch code — also called the lot code, lot number or serial number — is a short 4–8 character stamp of letters and numbers, usually embossed rather than printed in ink, and it is never the barcode. On a bottle or jar look at the base; on a tube look near the crimp/seal at the end; on a boxed perfume or fragrance check a flap or side of the box; on makeup check the underside of the compact or inside the pan.
We can't decode Duolab's batch code format yet. Check the printed expiration or best-before date on the pack, the PAO open-jar symbol, and the product's smell and texture.
Most unopened cosmetics and fragrances keep for about 30–36 months from manufacture. Once opened, follow the PAO (open-jar) symbol — it usually matters more than any printed expiration date.
Can the batch code tell me if my Duolab is authentic? Not on its own. A code that decodes to a sensible date is a good sign, but counterfeiters copy real codes from genuine packs, so a valid code cannot prove a Duolab product is authentic. Buy from Duolab or an authorised retailer, and compare the packaging, print quality and seal with one you know is genuine.
Yes — like all cosmetics and fragrances, Duolab products have a limited shelf life. Unopened they typically last 30–36 months from the manufacture date, and the batch code above tells you how old yours already is. After opening, the PAO (open-jar) symbol — e.g. "12M" — is a better guide than any printed expiration date.
← Batch code checker for every brand · Full ingredient breakdown in the ingredient checker.
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