How to Spot Fake Korean Skincare: A 7-Point Checklist (Anua, Medicube, COSRX)

Written by the Theglowk team in Seoul.

K-beauty bestsellers like Anua, Medicube and COSRX are so popular that copies are now a real problem. A fake skincare product isn't just a waste of money: its contents are unknown, so it can irritate your skin. Below is the checklist we use ourselves, based on guidance from brands such as Anua and COSRX.

One important caveat: no single sign proves a product is real or fake. Look for a pattern of red flags, and when in doubt, don't put it on your skin.

The 7-point checklist

1. Start with the seller, not the bottle

The safest source is the brand itself or a seller that can explain where its stock comes from. Be wary of listings priced far below the usual price, sellers with no return or contact information, and product photos that look blurry, outdated, or different from the brand's current packaging. Reviews that mention a "different smell" or "different texture than last time" are a warning sign.

2. Check the seal and print quality

Look for an intact seal or shrink wrap. Then look closely at the printing: genuine packaging has sharp text, even spacing, and correct spelling. Blurry or fuzzy text, misaligned labels and typos are common on copies, which are often printed from scanned images.

3. Find the batch (lot) code and expiry date

Most Korean skincare carries a batch code and an expiry or manufacturing date, usually on the bottom of a bottle or the crimped end of a tube. It should be crisp and legible, and the code on the product should match the one on the box. A batch code helps the manufacturer trace production, but on its own it does not prove the item is genuine.

4. Use the brand's own verification tools

• COSRX offers an official production history checker where you enter the batch number and expiry date. COSRX notes that this alone doesn't guarantee authenticity, but a missing record is a reason to ask questions.
• Anua publishes its own guide on how to spot fake Anua. If a product carries a holographic or encrypted QR seal, verify it only through the brand's designated app, never a random link.

5. Check the barcode, but don't rely on it

Products made in South Korea commonly use barcodes beginning with 880. That's a helpful hint, but barcodes can be copied, so treat it as one clue among many.

6. Compare texture and scent

If you know the product, compare. For example, Anua Heartleaf 77% Soothing Toner is fragrance-free, so a strong perfume smell would be odd. Separation, a harsh smell, an unusual color, or a texture that is very different from what you expect are all reasons to stop before applying.

7. Know that packaging can differ by market

Some brands make English-forward global packaging, so missing Korean text alone does not mean a product is fake. Compare against photos on the brand's official site for the market you bought from.

What to do if you think you got a fake

1. Don't use it on your skin.
2. Take photos of the seal, batch code, barcode, box, and the texture.
3. Contact the seller with your order number and photos.
4. Report it to the brand's official customer service if the seller can't explain it.

Our promise: 100% authentic, or your money back immediately

Every product at Theglowk is 100% authentic, sourced in Korea and shipped from Seoul with tracking. If you ever receive a product that isn't genuine, email us your order number and photos and we will refund you in full immediately, including shipping, even if the product has been opened. Read the details in our refund policy.

Related read: Anua Heartleaf 77 vs Round Lab Dokdo Toner: which one is right for you?

FAQ

Can a barcode or batch code prove a product is real?
No. Both are useful clues, but either can be copied. Use them together with the seller check, seal, print quality, and brand verification tools.

Is a cheaper price always a sign of a fake?
Not always, since sales happen. But a price far below what the brand and major retailers charge, especially from an unknown seller, is a common red flag.

Are fake products only a Korean problem?
No. Any popular product gets copied. That's why buying from a seller you can hold accountable matters.

Free shipping on orders over US$50. New here? Use code GLOWK20 for $20 off your first order.

Sources: Anua, COSRX FAQ. This article is general information, not medical advice.