100% authentic Korean-market formulas

Free US shipping on orders of $100 or more. 100% authentic Korean-market formulas. Ships from our California warehouse, at your door in 3-5 days. Intact Korean batch codes on every unit.

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KOREAN PHARMACY

Medicube

Triple Collagen Serum 4.0

Medicube Triple Collagen Serum 4.0 is a Korean-market serum built around Niacinamide, formulated in Korea and sold here in its original Korean-market formula rather than a US-shelf reformulation.

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$26.99Comparable US listings run $27.00 (5 dated US observations, checked 10 September 2026)

55ml

  • Korean-market formula
  • Ships from our California warehouse
  • Duties prepaid
Suited to
normal skincombination skindry skin
Helps with
loss of bounce and firmnessgeneral day-to-day maintenance as part of a full routinea routine that wants a Korean-market step in this category

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Next step in this routine

  1. Cleanse
  2. Prep
  3. Treat
  4. Sealnext
  5. Morning finish

Also standing in Seal: Dr. Althea 345 Relief Cream, $23.52.

  • Duties prepaid
  • 30-day returns
  • Free US shipping on orders of $100 or more
  • Dispatched within 2 business days

How it works

Medicube Triple Collagen Serum 4.0 is a serum built for the treatment step right after toner. Its ingredient list leads with Niacinamide, Collagen, and Adenosine, so the formula's stated purpose lines up with what actually sits near the top of that list rather than with a single marketing ingredient buried further down. Niacinamide does the most work here as a tone and texture, and the remaining actives round out the texture and finish rather than compete for attention. Placed as the treatment step right after toner, it is meant to be used AM/PM rather than swapped freely between steps. Because this is the Korean-market version of the Triple Collagen Serum 4.0 line rather than a US-reformulated variant, the texture and finish match what Medicube sells through Korean retail.

How to use

  1. AM or PM, after toner, as a glow-and-hydration serum step.
  2. Two to three drops in the palm, pressed over the face and neck rather than rubbed in.
  3. If you are sensitive to fragrance or alcohol, patch test on the inner arm before applying to the full face.
  4. Follow with a ceramide-based moisturizer, since this serum does not carry one itself, and with sunscreen in the morning.

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Medicube Triple Collagen Serum 4.0

Medicube Triple Collagen Serum 4.0

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Key benefits

  • Built around Niacinamide, positioned for tone and texture.
  • Built around Collagen, positioned for plumping feel.
  • Built around Adenosine, positioned for firming look.
  • Formulated as a serum for the treatment step right after toner.
  • The Korean-market Medicube formula for Triple Collagen Serum 4.0, matching what Medicube sells in Korea rather than a US-reformulated line.

Worth knowing

  • Patch test on the inner arm before the first full-face application, especially on skin that reacts easily to new products.
  • Stop use and rinse off if stinging, burning, or new redness shows up rather than pushing through discomfort.

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We’re on gram!

Creators trying on authentic Korean skincare routines and products from us.

  • Rating a shelf of Dr. Althea products one by one.

    Jasmine Loo · YouTube

  • Two hydrating serums side by side, IUNIK and Dr. Althea.

    Kristin · YouTube

  • A walk through the Dr. Althea serum lineup and who each one suits.

    auraofmahmuda · YouTube

  • A blunt first take on the Dr. Althea range.

    Lexi Chang · YouTube

  • A first look at the viral 345 Relief Cream before buying.

    Shelley Nayak · YouTube

  • A first try of the Dr. Althea serum on camera.

    Hannah Ziad · YouTube

Medicube, Korean-market original

Medicube's Korean-market serum led by Niacinamide, the same formula sold in Korea.

Verify your unit when it arrives

Verify your unit when it arrives

Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.

Medicube prints a QR code on the inner box. Scan it with your phone camera and it resolves to the brand’s own verification site.

Verify on medicubeverify.com

Source: Medicube packaging and verification site

On the unit itself

  • The Korean-market barcode, unaltered from the retail package.
  • The manufacturer’s batch code, exactly as the maker printed it.

정품Genuine article, Korean-market stock

What professionals say

What professionals say

What skin-care professionals say about skin care, quoted from the medical sources linked beside each.

  • Your skin barrier is basically your outer layer of the skin.

    Melissa Piliang, MDDermatologist, Cleveland Clinic
  • Pretty much every step of a Korean skin care routine is going to have some component of hydration.

    Alok Vij, MDDermatologist, Cleveland Clinic

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