Ships from California or direct from Korea, tracked to your door

Free US shipping on orders of $100 or more. 100% authentic Korean-market formulas. Ships from California or direct from Korea, tracked to your door. Intact Korean batch codes on every unit.

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KOREAN PHARMACY

Round Lab

Birch Juice Moisturizing Serum

Round Lab Birch Juice Moisturizing Serum (50 ml) is a serum for anyone who wants a concentrated middle step in their routine, used after your toner or essence and before your moisturizer.

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$14.11

50 ml

  • Ships from California or direct from Korea
  • Korean barcode and batch code intact
Suited to
Normal skinDry skinCombination skinSkin that runs sensitive
Helps with
A concentrated middle step between watery prep and a sealing moisturizerA specific concern that a moisturizer alone is spread too thin to addressLayering room between a toner and cream

In stock. Ships from California or direct from Korea

You’re $100.00 away from free US shipping.

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.

  • Ships from California or direct from Korea
  • 30-day returns
  • Free US shipping on orders of $100 or more
  • Tracked delivery to your door

Key benefits

  • Birch sap is declared at 10,000 ppm, one percent, at position seven
  • Three hyaluronate forms, sodium hyaluronate, glyceryl glucoside and hydrolyzed hyaluronic acid, run consecutively at eight through ten
  • Ascorbic acid, plain vitamin C, sits at thirteen for a brightening lift alongside the hydration work
  • Thirteen distinct botanical extracts run from position eighteen through thirty, a genuinely wide base rather than one hero plant
  • Beta-glucan and dipotassium glycyrrhizate support comfort mid list
  • No fragrance, no parfum, no essential oil anywhere on it

Key actives

8Sodium Hyaluronate

A smaller-molecule form of hyaluronic acid that spreads easily and helps the finish feel dewy rather than heavy.

10Hydrolyzed Hyaluronic Acid

A low-molecular-weight form of hyaluronic acid, included for a lighter, faster-absorbing hydration layer than the standard-weight form alone would give this particular formula.

12Hyaluronic Acid

A water-binding humectant that helps the surface feel plumper and less tight through the day, sitting on skin rather than sinking below it.

13Ascorbic Acid (Vitamin C)

Direct vitamin C, included in this formula's brightening blend and best paired with sunscreen since it can lose potency with light exposure.

Birch Sap (Betula Juice)

Birch sap carried at a named concentration in this formula, the ingredient Round Lab's Birch Juice line is named for and used here as its central hydrating ingredient.

Inside the formula

Inside the formula

40
Ingredients declared
No fragrance
on the list
8Sodium Hyaluronate12Hyaluronic Acid
  • 8Sodium Hyaluronate
  • 12Hyaluronic Acid

Where each key active sits on the declared ingredient list, by entry number. Position is proportion: the further forward, the larger its share.

1 of 3

Round Lab Birch Juice Moisturizing Serum

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How it works

Round Lab Birch Juice Moisturizing Serum is built as a serum, so its texture and finish are designed around one specific place in a routine rather than several. The formula's own ingredient list carries Hyaluronic Acid, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid among its named ingredients, placed at a level consistent with a serum rather than a spot treatment. The texture is built for use after your toner or essence and before your moisturizer, the concentrated middle step of a routine, which is why it behaves differently on skin than a product meant for a different point in a routine. This is the Korean-market formula of the birch juice moisturizing serum, the version sold on shelves in Korea rather than a formula reworked for a different market.

How to use

  1. AM and PM, after toner and before a heavier cream. Apply to damp skin so the hyaluronates have water to hold onto.
  2. Two to three drops, pressed evenly over the face and neck rather than rubbed in.
  3. If using a vitamin C serum for the first time, patch test on the inner arm first and introduce it every other day.
  4. Follow with a moisturizer, and with sunscreen every morning since vitamin C works best alongside daily sun protection.

Worth knowing

  • Introduce a new serum gradually rather than every day at first, so it is easier to tell if skin is reacting to it specifically.
  • Seal it with a moisturizer rather than leaving it to sit alone, since a serum is a middle step and not built to finish a routine.

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Round Lab Birch Juice Moisturizing Serum

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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

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    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

Round Lab, Korean-market original

Birch juice serum, 50 ml, birch sap at 10,000 ppm, three hyaluronate forms.

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.

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
  • It helps to reduce inflammation of the skin and retain moisture to maintain the barrier function of skin.

    Dr. Jaishree SharadDermatologist, Femina
1 more professional perspective
  • Using topical vitamin C can result in less cell damage and better-looking skin.

    Melissa Piliang, MDDermatologist, Cleveland Clinic

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