Medicube
Zero Foam Cleanser$14.11Round Lab
Birch Juice Moisturizing Cleanser
Round Lab Birch Juice Moisturizing Cleanser (150 ml) is a foam cleanser for anyone who wants a cleanse that does not leave skin feeling tight, used first.
No reviews yet150ml
$10.66 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Normal skinCombination skinOily skinSkin that runs sensitive
- Helps with
- Buildup of sunscreen and daily grimeA tight feeling right after washingExcess surface oil by midday
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$14.11
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How it works
Round Lab Birch Juice Moisturizing Cleanser is built as a foam cleanser, 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, Birch Sap (Betula Alba Juice) among its named ingredients, placed at a level consistent with a foam cleanser rather than a spot treatment. The texture is built for use first, as your cleansing step, before any leave-on product, 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 cleanser, the version sold on shelves in Korea rather than a formula reworked for a different market.
Key benefits
- Four amino-acid-derived surfactants carry the wash: sodium cocoyl alaninate, lauryl hydroxysultaine, disodium cocoamphodiacetate, sodium methyl cocoyl taurate
- Birch sap (Betula Alba Juice) declared at 10,000 ppm, entry eight
- Ascorbic acid and two hyaluronic acid forms sit behind it, unusual for a rinse-off formula
- Chamomile (Anthemis Nobilis) and pine leaf oils are the named scent source, not a generic fragrance entry
- No sulfates (SLS or SLES) on the list
Inside the formula
Inside the formula
Round Lab Birch Juice Moisturizing Cleanser
Is this the same formula sold in Korea, or a version made for the US market?
This is the Korean-market formula, the same one sold on shelves in Korea, not a separate version reformulated for US retail. The pack you open matches what a shopper in Seoul buys.
Where does this step go in a routine?
It belongs first, as your cleansing step, before any leave-on product. Placing it earlier or later than that changes how it feels going on and how well the steps after it absorb, so keeping it in that order is worth doing even on a simplified routine.
Can I use this if my skin runs sensitive?
This foam cleanser is formulated with skin types like normal skin, combination skin in mind, but any new product is worth a patch test first if your skin reacts easily. A short patch test on the inside of your arm or behind an ear is worth doing with any new product before it goes on your face, and that goes for sensitive skin most of all.
How long before I will know if this is right for my skin?
Give it a full week or two of consistent use before judging, since a single use rarely tells you much either way. Watch for how skin feels rather than for any specific number, and stop use if you notice ongoing irritation.
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, Acrylate/C10-30 Alkyl Acrylate Crosspolymer, Betula Alba Juice (10,000 Ppm), 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 incidecoder.com on 30 August 2026.
26 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.
- Acrylate/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 Alba Juice (10,000 Ppm) plant extract
- Birch juice is sap tapped from the white birch in spring. It is mostly water with sugars, minerals and amino acids, and Korean formulas use it in place of water as the 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.
14 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.
- Coco-Glucoside surfactant
- Coco-Glucoside is a mild sugar-derived surfactant used in gentle cleansers, usually with a second surfactant to build foam.
- 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)
- 8809657116544
- Made in
- Republic of Korea
- Volume
- 150ml
- Category
- Cleanser / Foam/Gel 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
- Use it on damp skin, morning and evening, as the first step of the routine.
- A short pump into wet palms, worked into a soft lather before it goes near the face.
- Massage for twenty or thirty seconds, then rinse with lukewarm water instead of hot.
- In the evening follow an oil or balm cleanse with it rather than using it alone over makeup or sun care.
Worth knowing
- Keep to lukewarm rather than hot water, since hot water is what leaves a cleanser feeling stripping.
- Cut back to once daily if the skin feels tight rather than clean afterward.
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.
Rating a shelf of Dr. Althea products one by one.
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A blunt first take on the Dr. Althea range.
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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
Slightly acidic foam cleanser, 150 ml, with Birch Sap, Hyaluronic Acid and Vitamin C.
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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