Korean lash serums, explained
K-beauty has a reputation for gentle, ingredient-led formulas, and lash serums are no exception. Here is what that means in practice, how to tell a good one from a risky one, and what to check when you buy from Canada.
Written by the Re:Cosm team · Last reviewed September 23, 2026 · Cosmetic information, not medical advice
What people mean by a Korean lash serum
Usually a lash serum formulated and manufactured in South Korea. Many are built around conditioning peptides and hydrating ingredients rather than prostaglandin analogs, and they tend to include soothing botanicals that are staples of Korean skincare, such as centella asiatica and houttuynia cordata.
That is a tendency, not a rule. Some lash serums sold as Korean contain prostaglandin analogs, so the label still decides.
Who makes them
Much of Korean beauty is produced by large contract manufacturers that develop and make formulas for many brands, both Korean and international. Kolmar Korea and Cosmax are the two best known. A brand naming its manufacturer is a good sign: it means the formula comes out of a GMP-certified facility with its own quality controls. Re:Cosm Lash Conditioning Serum is made by Kolmar Korea.
How to read a Korean lash serum label
- Find the English INCI list. Imported products sold in Canada must carry one.
- Check for prostaglandin analogs: names with -prost, prostenol, cloprostenate or noralfaprostal.
- Look for the conditioning core: a peptide such as Acetyl Tetrapeptide-3, plus panthenol or hyaluronic acid.
- Look for fragrance. Many K-beauty eye products are fragrance-free; confirm it.
- If you wear extensions, confirm there are no oils.
Read more: Acetyl Tetrapeptide-3
Buying a Korean lash serum in Canada
A cosmetic sold in Canada has to meet Canadian rules, whatever its country of origin. The manufacturer or importer must notify Health Canada within ten days of first sale, the label needs a full ingredient list, and ingredients on the Cosmetic Ingredient Hotlist, including isopropyl cloprostenate, cannot be used.
Products shipped directly from overseas marketplaces skip those checks. Buying from a brand or retailer that sells in Canada means someone is accountable for the product meeting them.
Where Re:Cosm fits
Re:Cosm is a Toronto-based brand with a Korean-made, peptide-based lash conditioning serum: Capixyl™, biotin, panthenol and cationic hyaluronic acid, with centella, licorice root and houttuynia for comfort. It is prostaglandin-free, fragrance-free and oil-free, and every ingredient is published.
Read more: every ingredient
Common questions
Are Korean lash serums safe?
Many are, but safety depends on the formula, not the country. Check the full ingredient list for prostaglandin analogs and fragrance.
Do Korean lash serums contain prostaglandins?
Many are peptide-based, but some do contain prostaglandin analogs. Read the INCI list; names with -prost or cloprostenate are the ones to avoid.
Who manufactures Korean lash serums?
Often large contract manufacturers such as Kolmar Korea and Cosmax, which produce formulas for many brands.
Can I buy a Korean lash serum in Canada?
Yes. Look for products sold through Canadian brands or retailers, which must meet Health Canada's cosmetic rules, including the ban on isopropyl cloprostenate.
More guides: prostaglandin-free lash serums, lash serum ingredients, lash serum with extensions.
Sources and standards
Ingredient facts are checked against our published formula and the sources below. We describe how lashes look and feel, never growth: that is a drug claim, and our serum is a cosmetic.
Re:Cosm Lash Conditioning Serum
Peptide-based. Prostaglandin-free, fragrance-free and oil-free. Made in Korea by Kolmar Korea.
See the serum