Free US shipping on orders of $100 or more

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.

Shipping details
KOREAN PHARMACY

Real Barrier Retiniol Pore Tightening Serum 30ml

Real Barrier Retiniol Pore Tightening Serum 30ml carries ten separate hyaluronic acid forms on its own ingredient panel, including Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Hyaluronic Acid, Dimethylsilanol Hyaluronate.

No reviews yet
$47.50
  • Ships from our California warehouse
  • Duties prepaid
Suited to
dull, uneven-tone skindry, dehydrated skinskin looking to layer a targeted step under moisturizer
Helps with
dullness and an uneven-looking tonedehydration sitting under a moisturizer that cannot fix it alonea lack of bounce in tired-looking skin

In stock. Ships from our California warehouse, dispatched within 2 business days

You’re $100.00 away from free US shipping.

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

Key benefits

  • Ten forms of hyaluronic acid on one panel, not a single token inclusion
  • Niacinamide on the same panel, the formula's active
  • Collagen Extract on the same panel, the formula's protein
  • 30 ml to a unit
  • Korean GS1 barcode matched against a Korea sourcing supplier's record for this item

Key actives

Sodium Hyaluronate

Sodium Hyaluronate is the salt of hyaluronic acid, and it is what most products labelled hyaluronic actually contain. The salt dissolves more readily and the molecule is smaller, so it sits in the outer layer of skin rather than only on top of it.

Hydrolyzed Hyaluronic Acid

Hydrolyzed Hyaluronic Acid is hyaluronic acid cut into much shorter fragments. The smaller the fragment, the further into the outer layer it can settle, which is why serums stack several sizes together instead of using one.

Hyaluronic Acid

Hyaluronic Acid is a sugar chain the body already makes, and one gram of it can hold several litres of water. In a formula it is a humectant that pulls water to the surface of skin and holds it in a film, which is what makes skin look plumper while it is there.

Dimethylsilanol Hyaluronate

Dimethylsilanol Hyaluronate is hyaluronic acid joined to a silicon-based group. It hydrates and leaves a smoother, silkier finish than hyaluronic acid alone.

Niacinamide

Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. It is used at roughly 2 to 5 percent for the look of uneven tone and visible pores, and it is water soluble, stable and comfortable beside almost every other active, which is why it turns up in so many lists.

Collagen Extract

Collagen Extract is a collagen-bearing extract, usually from fish skin or scales. In a formula it works as a humectant and a smoothing film rather than as a source of new collagen.

Tocopheryl Acetate

Tocopheryl Acetate is a stable vitamin E ester that skin converts to tocopherol. It is used as an antioxidant and a light emollient and holds up better than plain vitamin E in a formula.

How to use

  1. Use Real Barrier Retiniol Pore Tightening Serum 30ml after toner and before cream, patting rather than rubbing it into skin.

1 of 8

Real Barrier Retiniol Pore Tightening Serum 30ml

Payment and security

We accept

How it works

The panel on this serum names ten forms of hyaluronic acid rather than one: Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Hyaluronic Acid, Dimethylsilanol Hyaluronate, Hydrolyzed Sodium Hyaluronate, Potassium Hyaluronate, Hydroxypropyltrimonium Hyaluronate, Sodium Hyaluronate Crosspolymer, Sodium Hyaluronate Dimethylsilanol, Sodium Acetylated Hyaluronate. Sodium Hyaluronate is the salt of hyaluronic acid, and it is what most products labelled hyaluronic actually contain. The salt dissolves more readily and the molecule is smaller, so it sits in the outer layer of skin rather than only on top of it. On this panel it sits alongside Niacinamide, Collagen Extract and Tocopheryl Acetate. Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. It is used at roughly 2 to 5 percent for the look of uneven tone and visible pores, and it is water soluble, stable and comfortable beside almost every other active, which is why it turns up in so many lists.

Worth knowing

  • This step is not a substitute for a dedicated sunscreen, which should still be the last step of the morning routine.
  • Skin that is actively broken out or irritated does best starting this once daily before moving to twice.

Reviews

No reviews yet. Tell us how much you love the product!

Write Reviews (opens in a new tab)

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

Korean-market original

Retiniol Pore Tightening Serum 30ml is Real Barrier's Korean-market serum, sourced for the US market rather than reformulated for it.

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.

Match the batch code on the box against the code printed on the bottle or tube itself; the two are stamped separately and should agree.

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 the key actives in this formula, quoted from the medical sources linked beside each.

  • Hyaluronic acid helps bind water to collagen, which traps water in the skin. That helps make the skin more plump and full-looking.

    Samantha Stein, PA-CDermatology physician assistant, Cleveland Clinic
  • Topical collagen is a very large molecule that's too big to absorb into the skin.

    Michelle Henry, MDDermatologist, Cosmopolitan
1 more professional perspective
  • Niacinamide helps reduce the appearance of pores in a few ways. By strengthening the skin barrier and improving elasticity, pores appear less noticeable and more even.

    Ashlyn YankeAesthetician, Cleveland Clinic

Ask an AI assistant about this product

Ask an AI assistant about this product

Opens ChatGPT, Perplexity or Claude in a new tab with the question prefilled. Claude asks you to sign in first.