• Facial serum with peptides and vitamin U CU: VITAMIN U SERUM - Koreancare
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Facial serum with peptides and vitamin U CU: VITAMIN U SERUM

CUSKIN

€42,45
€47,16
€42,45
Tax included. Shipping calculated at checkout.
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South Korea

60 ml.

CUSKIN Vitamin U Serum is a lightweight, fast-absorbing serum built around the brand's signature ingredient, vitamin U (methyl methionine), a sulfur-containing amino acid. It sinks in quickly, leaves no tacky finish and is formulated to feel comfortable on skin that tends to look thin, dry or dull.

The formula combines vitamin U with the Syn-Ake peptide and a blend of hyaluronic and polyglutamic acid to give skin a hydrated, smoother-looking, more supple appearance. With regular use it helps skin look fresher and more even-toned, with a soft, cared-for feel.

Who it's for

A good match if you want a hydrating, peptide-based serum for skin that looks dry, dull or lacking in bounce. The gentle texture suits sensitive and mature skin types looking for everyday moisture and a smoother surface look.

Key ingredients

  • Vitamin U (methyl methionine) – CUSKIN's signature amino acid, included to help skin feel conditioned and comfortable.
  • Syn-Ake peptide (tripeptide) – a peptide popular in K-beauty serums to support a smoother-looking, softened skin surface.
  • Adenosine, oligopeptide-1 and acetyl hexapeptide-8 – peptide-family actives that support a firmer, smoother appearance.
  • Polyglutamic acid – a humectant that boosts surface hydration and helps skin feel soft and elastic.
  • Hyaluronic acid – draws in and holds moisture for plumper-looking, comfortable skin throughout the day.
  • Vitamin C (sodium ascorbyl phosphate) – an antioxidant that helps skin look brighter and more even.

The serum also contains amino acids, plant extracts and arbutin.

How to use

After cleansing and toning, apply a few drops to clean skin morning and evening. Pat in gently until absorbed, then follow with moisturizer. For daytime use, finish with sunscreen.

INGREDIENTS

Water, Glycerin, Butylene Glycol, 1,2-Hexanediol, Niacinamide, Methylmethionine (50ppm), Dipeptide Diaminobutyroyl Benzylamide Diacetate, Ceramide NP, Polysorbate 20, Lecithin, Alanine/Histidine/Lysine Polypeptide Copper HCl, Oligopeptide-1, Palmitoyl Pentapeptide-4 , sh-Oligopeptide-1, Adenosine, Sodium Hyaluronate, Polyglutamic Acid, Dehydroxanthan Gum, Belamcanda Chinensis Root Extract, Hydrolyzed Corn Protein, Hydrolyzed Wheat Protein, Hydrolyzed Soy Protein, Arginine, Carbomer, Dipotassium Glycyrrhizate, Hydrogenated Phosphatidylcholine, Allantoin, Ethylhexylglycerin, Hydroxyethylcellulose , Hydrogenated Lecithin, Methionine, Serine, Histidine, Polyglyceryl-10 Laurate, Fragrance.
How to use

The serum should be used daily, morning and evening, after applying the tonic. The serum is hypoallergenic and suitable for the most sensitive skin. After a course of using the serum (4 weeks), the skin looks smoother, moisturized, firm and radiant. Do not use together with AHA, BHA, PHA acids (glycolic, lactic, salicylic, citric, etc.). These acids destroy the active component of the serum - the muscle relaxant - syn-ake.

Facial serum with peptides and vitamin U CU: VITAMIN U SERUM - Koreancare

Why Koreancare?

  • Fast delivery

    Usually within 2–4 business days.

  • CPNP

    All products has CPNP certificates

  • Returns

    14-day return policy for unopened and unused products

FAQs

Are your products authentic and imported directly from Korea?

Yes, all our products are 100% authenticand are imported directly from South Korea. We work only with verified suppliers and brandsto ensure the highest quality and safety for our customers.

How long does shipping take and do you ship internationally?

We offer fast domestic shipping, usually within 2-4 business days. International shipping is available for selected countries and takes approximately 5–10 business days, depending on your location. Delivery time may vary during holidays or high-demand periods.

Can I return a product if I’m not satisfied?

Yes, we offer a 14-day return policyfor unopened and unused products. If there's an issue with your order or a product arrives damaged, please contact us within 48 hoursof receiving your package and we’ll help resolve the issue promptly.