Type the batch (lot) code from your La Mer product — skincare, makeup or perfume — and we decode the manufacture date, how old it is, and an expiration estimate.
Ingredients, checked
Every one scored 0–100 on ingredient safety, with the low/moderate/high breakdown behind it. No brand pays for placement.
30 low · 6 moderate · 6 high-risk
La Mer
Creme De La Mer
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50 low · 6 moderate · 2 high-risk
La Mer
The Treatment Lotion
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72 low · 1 moderate · 2 high-risk
La Mer
The Eye Concentrate
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53 low · 7 moderate · 3 high-risk
La Mer
The Rejuvenating Night Cream
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86 low · 7 moderate · 2 high-risk
La Mer
Genaissance de la Mer The Serum Essence
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23 low · 6 moderate · 3 high-risk
La Mer
Crème De La Mer Moisturizer
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68 low · 4 moderate · 0 high-risk
La Mer
Soft Fluid Long Wear Foundation Broad Spectrum SPF 20
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38 low · 6 moderate · 2 high-risk
La Mer
The Hydrating Infused Emulsion
See what's in it →Where to buy
Current stock at Amazon. Affiliate link — we may earn a commission at no cost to you, and it never affects the grades above.
On real La Mer packaging (made by Estée Lauder Inc.) — green is the code, red is not (the barcode, article number or open-jar symbol):
The La Mer 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.
La Mer codes encode the production date.
Real documented examples: code → manufacture date.
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.
We've read 461 La Mer batch codes so far, the newest was made September 2026, and the typical La Mer product people check here is about 32 months old.
Can the batch code tell me if my La Mer 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 La Mer product is authentic. Buy from La Mer or an authorised retailer, and compare the packaging, print quality and seal with one you know is genuine.
Yes — like all cosmetics and fragrances, La Mer 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.
Unopened: general cosmetics guidance. Opened: general guidance by product type. A date or open-jar symbol on your pack always wins.
← Batch code checker for every brand · Full ingredient breakdown in the ingredient checker.
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