Medicube
Zero Foam Cleanser$14.11Round Lab
Birch Juice Moisturizing Cleanser
Round Lab Birch Juice Moisturizing Cleanser is a daily foaming cleanser for skin that feels tight and dehydrated by midday, used as your cleansing step.
No reviews yet150 ml
$10.19 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Dry skinDehydrated skinNormal skinCombination skin
- Helps with
- Everyday hydrationA plumper looking surfaceComfort after cleansing
In stock. Arrives in 3 to 7 business days
We accept
You’re $100.00 away from free US shipping.
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
A foaming cleanser is a rinse-off step, so nothing about it stays on the skin and it is judged by how the face feels a minute after rinsing. Worked into a lather in wet hands, it lifts the day's oil and grime off the surface and takes it away with the rinse water. Skin holding enough water in its top layer reflects light more evenly and feels supple, and that is the whole of what a hydrating step changes. A cleansing water wipes off without rinsing, while a foam needs running water and does a more thorough job of it. The result you can judge yourself is whether your skin still feels comfortable hours after you finish your routine.
Key benefits
- Birch Juice Moisturizing Cleanser is Round Lab's cleanser, sourced for the Korean market rather than reformulated for US shelves.
- Carries Betula Platyphylla Japonica Juice, which is Round Lab's signature birch sap, the brand's own moisture base drawn from Korean white birch trees.
- Carries Sodium Hyaluronate, which is a salt-form humectant from the hyaluronan family, smaller and faster-absorbing than the parent molecule, and a staple of Korean hydration formulas.
- Carries Hyaluronic Acid, which is the water-binding polymer most Korean hydration formulas are built around.
- Ships with the Korean-market barcode and batch code intact, the same box sold on Korean shelves rather than a US repack.
- Suited to shoppers targeting dehydration and a compromised moisture barrier.
Inside the formula
Inside the formula
What is Birch Juice Moisturizing Cleanser?
It is a daily foaming cleanser from Round Lab, made for skin that feels tight by the afternoon, whatever its oil level, and anyone whose routine leaves it thirsty. It goes first, as your cleansing step, before any leave-on product. The result you can judge yourself is whether your skin still feels comfortable hours after you finish your routine.
Where does Birch Juice Moisturizing Cleanser go in my routine?
It goes first, as your cleansing step, before any leave-on product. In practice: Lather a small amount in wet hands, massage over a wet face for about thirty seconds and rinse with lukewarm water. Applying it out of that order is the usual reason a step seems to do nothing.
Is Birch Juice Moisturizing Cleanser right for my skin type?
It is aimed at skin that feels tight by the afternoon, whatever its oil level, and anyone whose routine leaves it thirsty. The skin types we would put first are dry skin, dehydrated skin and normal skin. Dehydration and dryness are different problems, and oily skin can be dehydrated, which is why this suits more skin types than a rich cream would.
Is it too stripping to use morning and night?
For most skin, no, and the test is how your face feels sixty seconds after rinsing rather than immediately. Comfortable is right, squeaky and tight is too much. If mornings leave you tight, rinse with water only when you wake and keep this for the evening.
Is this Birch Juice Moisturizing Cleanser the authentic Korean-market formula?
Yes. We stock the Round Lab Korean-market formula rather than a version reformulated for US shelves. The tube you open is the 150ml one sold on Korean shelves, with Korean-primary packaging and an intact barcode you can check yourself.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (26): Water, Glycerin, Sodium Cocoyl Alaninate, Lauryl Hydroxysultaine, Disodium Cocoamphodiacetate, Sodium Methyl Cocoyl Taurate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Betula Platyphylla Japonica Juice(10,000ppm), Butylene Glycol, Sodium Hyaluronate, Hyaluronic Acid, Sodium Chloride, Glyceryl Glucoside, Ascorbic Acid, 1,2-Hexanediol, Artemisia Annua Extract, Anthemis Nobilis Flower Oil, Pinus Sylvestris Leaf Oil, Quillaja Saponaria Bark Extract, Caprylyl Glycol, Coco- Glucoside, Glyceryl Caprylate, Sodium Cocoyl Isethionate, Hexylene Glycol, Citric Acid, Disodium EDTA
Ingredient list read from jolse.com on 10 September 2026.
25 of 26 explained
- Water solvent
- Water is the base almost every serum, toner and cream is built on. It dissolves the water-loving ingredients and sets how light the finished texture feels. On an INCI list it is usually first, which only means it is the largest single ingredient by weight.
- Glycerin humectant
- Glycerin is the most used humectant in skincare. It draws water into the outer layer of skin and holds it there, and it is one of the very few ingredients whose hydrating effect is settled science rather than marketing. Higher amounts feel tacky, which is why it is usually blended.
- Sodium Cocoyl Alaninate surfactant
- An amino-acid surfactant made from coconut fatty acids and alanine. It foams less aggressively than a sulfate and rinses without the tight feeling.
- Lauryl Hydroxysultaine surfactant
- Lauryl Hydroxysultaine is a mild secondary surfactant that keeps foaming even in hard water and at low pH.
- Disodium Cocoamphodiacetate surfactant
- Disodium Cocoamphodiacetate is a very mild coconut-derived surfactant used in cleansers for reactive skin and around the eyes.
- Sodium Methyl Cocoyl Taurate surfactant
- Sodium Methyl Cocoyl Taurate is a mild coconut-derived surfactant known for a rich, creamy lather that rinses without tightness.
- Acrylates/C10-30 Alkyl Acrylate Crosspolymer thickener
- This is a carbomer relative with fatty side chains, so it thickens and stabilises an emulsion at the same time. It gives a light gel-cream body rather than a heavy one.
- Betula Platyphylla Japonica Juice(10,000ppm) plant extract
- Betula Platyphylla Japonica Juice is Asian white birch sap, tapped in spring. It is over 98 percent water with trace minerals and sugars, and Korean formulas use it in place of plain water as a hydrating base.
- Butylene Glycol humectant
- Butylene Glycol is a small glycol that does two jobs at once: it holds water in the top layer of skin and it dissolves plant extracts and actives that plain water cannot. It also thins a formula, which is why watery Korean essences lean on it.
- Sodium Hyaluronate humectant
- 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.
- Hyaluronic Acid humectant
- 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.
- Sodium Chloride thickener
- Sodium Chloride is salt. In a cleanser it thickens the liquid; in a mask or essence it balances the mineral content of the water phase. It has no active role.
13 more explained
- Glyceryl Glucoside humectant
- Glyceryl Glucoside is glycerin bound to glucose, from the resurrection plant. It is a humectant that holds water in the outer layer of skin.
- Ascorbic Acid antioxidant
- Ascorbic Acid is pure vitamin C, the most researched form and also the least stable: it needs a low pH and airtight packaging to stay active. It is an antioxidant used for the look of dullness and uneven tone.
- 1,2-Hexanediol humectant
- 1,2-Hexanediol is a glycol used for two reasons: it holds water like glycerin, and it makes a formula harder for microbes to live in, so less traditional preservative is needed. Korean formulas use it heavily for that second reason.
- Artemisia Annua Extract plant extract
- Artemisia Annua is sweet wormwood, a mugwort relative. Its extract is used in Korean formulas for the look of reactive skin.
- Anthemis Nobilis Flower Oil fragrance component
- Anthemis Nobilis is Roman chamomile. The flower oil is an essential oil, so it scents a formula as well as conditioning it, and essential oils are the class most likely to bother reactive skin.
- Pinus Sylvestris Leaf Oil fragrance component
- Scots Pine Leaf Oil is a conifer essential oil used to scent a formula.
- Quillaja Saponaria Bark Extract surfactant
- Soapbark extract, rich in natural saponins. Saponins foam in water, which is why this is used as a plant-derived cleansing agent rather than as a botanical.
- Caprylyl Glycol preservative booster
- Caprylyl Glycol is a glycol that conditions skin and, more importantly, strengthens a preservative system so less of the traditional preservative is needed. It appears in most modern formulas built without parabens.
- Glyceryl Caprylate emulsifier
- Glyceryl Caprylate is a mild emulsifier that also makes a formula less hospitable to microbes, so it is often part of a preservative-free system.
- Sodium Cocoyl Isethionate surfactant
- Sodium Cocoyl Isethionate is a coconut-derived surfactant that gives a dense, creamy foam while staying mild. It is the usual choice in syndet cleansing bars.
- Hexylene Glycol solvent
- Hexylene Glycol is a solvent and light humectant. It keeps ingredients that resist water in solution and thins a formula so it spreads evenly.
- Citric Acid pH adjuster
- Citric Acid is used in tiny amounts to bring a formula to the pH its actives need, not as an exfoliant at that level. It is an AHA, so at much higher concentrations it can also exfoliate.
- Disodium EDTA chelator
- EDTA is a chelator: it locks up trace metal ions from water and packaging that would otherwise turn a formula cloudy, off-colour or rancid. It does nothing to skin and appears at a fraction of a percent.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809738600238
- Made in
- Republic of Korea
- Volume
- 150 ml
- Category
- Cleanser
- Actives
- Birch Sap, Hyaluronic Acid, Sodium Hyaluronate, Vitamin C
- Ships from
- California or Korea
Orders ship from California or direct from Korea with tracked delivery to your door, and both routes carry the same Korean-market release. Shipping is free on orders of $100 or more. Returns are accepted for 30 days, by mail.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Barcode
Listed against the Korean barcode on its box - 3California or Korea
Ships to you from either, as the same Korean-market release
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name. The barcode in the specification above is the Korean-market one and it is printed on the box you receive.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Every order ships from California or direct from Korea, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
How to use
- Wet the face with lukewarm water, since a lather on dry skin drags rather than glides.
- Work a small amount into a lather in your palms first, then massage it over the face for about thirty seconds.
- Rinse thoroughly, especially along the jaw and hairline where cleanser gets left behind.
- Do not use hot water or scrub at the skin, and do not wait for the face to dry before your next step.
Worth knowing
- Patch test on a small area first if your skin reacts easily to new products.
- Apply it on damp rather than dry skin, since a hydrating step has more to hold on to that way.
Complete the routine
- This itemRound Lab Birch Juice Moisturizing Cleanser$15.29

- Seal the routine in as the last stepRound Lab Dokdo Lotion 400ml$32.50

- Cleanse first, so the next step meets bare skinRound Lab Birch Juice Cleansing Pad 60Pads$27.50

Total for 3 items$75.29
Reviews
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Round Lab Birch Juice Moisturizing Cleanser
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
We’re on gram!
Creators trying on authentic Korean skincare routines and products from us.
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A first try of the Dr. Althea serum on camera.
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Round Lab, Korean-market original
A daily foaming cleanser, 150ml, for skin that feels tight and dehydrated by midday. Authentic Round Lab Korean-market formula.
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 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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