Medicube
Zero Foam Cleanser$14.11Gentle Cleansing Foam
Sulwhasoo Gentle Cleansing Foam is a foaming cleanser that names Isostearic Acid on its own ingredient panel, sourced as the Korean-market formula.
No reviews yet50 ml
$18.80 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Normal skinOily skinCombination skinSkin that runs sensitive
- Helps with
- A first or only cleansing step that will not leave skin feeling strippedA gentle, low-pH cleanse before the rest of a routineEveryday makeup and sunscreen removal at the end of the day
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
Isostearic Acid is named on the ingredient panel on this foaming cleanser. Isostearic Acid is a branched fatty acid, so unlike stearic acid it stays liquid. It conditions and helps disperse pigments. On this panel it sits alongside Coix Lacryma-Jobi Ma-Yuen Seed Extract, Citrus Unshiu Peel Extract and Castanea Crenata (Chestnut) Shell Extract. Adlay, or Job tears, a grain used in both Korean cooking and Korean herbal practice. The seed extract carries starch-derived sugars and amino acids.
Key benefits
- Isostearic Acid named on this product's own ingredient panel
- Coix Lacryma-Jobi Ma-Yuen Seed Extract on the same panel, the formula's plant extract
- Citrus Unshiu Peel Extract on the same panel, the formula's plant extract
- 50 ml to a unit
- Korean GS1 barcode matched against a Korea sourcing supplier's record for this item
How to use
- Use the Gentle Cleansing Foam as your first step, morning and evening, on a face already wet with lukewarm water.
- Pump about 2 times and make sufficient foam with water. Massage your face gently and rinse off with lukewarm water.
- Rinse with lukewarm water and go straight on to your toner while skin is still damp, because a humectant layer has more to hold on to on a damp face.
- Twice a day is the ceiling. Do not follow it with a second cleanse in the morning, when there is no sunscreen or makeup left on the face to remove.
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.
Where does Gentle Cleansing Foam go in a routine?
It belongs the first or only cleansing step, used morning and night on wet skin before the rest of a routine. Placing it earlier or later than that changes how it feels going on and how well the steps around it perform, so it is worth following that order rather than treating it as interchangeable with a different type of product.
Is this suited to my skin type?
It is formulated with normal skin, oily skin, combination skin, and skin that runs sensitive in mind, and it does not lean on a heavy fragrance load or a harsh surfactant base to do its job. If your skin is easily reactive, patch test on a small area first before working it into a full routine.
Is this product fragranced?
Yes, this formula's own ingredient list includes Fragrance, listed as Parfum. If you are sensitive to added scent or prefer a fragrance-free routine, this is worth knowing before you build it into daily use.
Who should be careful with this product, or wait before trying it?
Keep it out of the eyes and rinse immediately with water if it gets in. Beyond that, anyone new to the brand or the format should patch test on a small area first rather than applying it across the whole face on day one.
Not on the ingredient list below: denatured or SD alcohol, essential oils, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (36): Water/Aqua/Eau, Potassium Cocoyl Glycinate, Disodium Cocoamphodiacetate, Cocamidopropyl Betaine, Acrylates/Beheneth-25 Methacrylate Copolymer, PEG-200 Hydrogenated Glyceryl Palmate, Sodium Chloride, Pentylene Glycol, 1,2-Hexanediol, Sodium Methyl Cocoyl Taurate, Caprylyl/Capryl Glucoside, PEG-7 Glyceryl Cocoate, Fragrance/Parfum, Isostearic Acid, Potassium Hydroxide, Butylene Glycol, Limonene, Disodium EDTA, Ethylhexylglycerin, Sodium Benzoate, Tetrasodium EDTA, Coix Lacryma-Jobi Ma-Yuen Seed Extract, Citrus Unshiu Peel Extract, Castanea Crenata (Chestnut) Shell Extract, Linalool, Spirodela Polyrhiza Extract, Dioscorea Japonica Root Extract, Dextrin, Theobroma Cacao (Cocoa) Extract, Rubus Idaeus (Raspberry) Fruit Extract, Ulmus Davidiana Root Extract, Salicornia Herbacea Extract, Morus Alba Leaf Extract, Angelica Keiskei Extract, Citric Acid, Tocopherol
Ingredient list read from incidecoder.com on 30 August 2026.
32 of 36 explained
- Water/Aqua/Eau 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.
- Potassium Cocoyl Glycinate surfactant
- Potassium Cocoyl Glycinate is a coconut-and-glycine surfactant used in low-pH cleansers. It foams well and rinses without the squeaky tightness a soap leaves.
- Disodium Cocoamphodiacetate surfactant
- Disodium Cocoamphodiacetate is a very mild coconut-derived surfactant used in cleansers for reactive skin and around the eyes.
- Cocamidopropyl Betaine surfactant
- Cocamidopropyl Betaine is a coconut-derived secondary surfactant. Its job is to boost foam and soften the harshness of the main cleanser rather than to clean on its own.
- Acrylates/Beheneth-25 Methacrylate Copolymer thickener
- A thickener that responds to pH: it stays fluid while acidic and gels once neutralised. It is common in cleansers and clear gels.
- 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.
- Pentylene Glycol humectant
- Pentylene Glycol hydrates and, like the other longer-chain glycols, makes a formula less hospitable to microbes so the preservative system can be lighter. It also improves how evenly a product spreads.
- 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.
- 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.
- Caprylyl/Capryl Glucoside surfactant
- Caprylyl/Capryl Glucoside is a sugar-derived cleansing surfactant. It foams modestly and is mild enough for low-pH cleansers built for reactive skin.
- Fragrance/Parfum fragrance
- Fragrance, or Parfum, is a single declaration standing for a whole scent blend, which can be dozens of materials. Regulators allow it as a trade secret, so a list showing only this word does not say what the scent is made of. It is the most common trigger named by people with reactive skin.
- Isostearic Acid fatty acid
- Isostearic Acid is a branched fatty acid, so unlike stearic acid it stays liquid. It conditions and helps disperse pigments.
20 more explained
- Potassium Hydroxide pH adjuster
- Potassium Hydroxide is a strong base used in traces to raise a formula to its target pH. In a soap-style cleanser it also converts fatty acids into the surfactant that does the cleansing.
- 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.
- Limonene fragrance component
- Limonene is the citrus-peel aromatic. It appears here because EU labelling requires 26 fragrance components to be named individually rather than hidden inside "fragrance", and it is one of them.
- 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.
- Ethylhexylglycerin preservative booster
- Ethylhexylglycerin softens skin and boosts a preservative system, which is why it is nearly always sitting beside phenoxyethanol or 1,2-hexanediol. It also cuts down the odour bacteria produce, so it turns up in deodorising products.
- Sodium Benzoate preservative
- Sodium Benzoate is a mild preservative that works only in acidic formulas. It is usually paired with potassium sorbate, and the pair is the standard choice where a brand wants no phenoxyethanol.
- Coix Lacryma-Jobi Ma-Yuen Seed Extract plant extract
- Adlay, or Job tears, a grain used in both Korean cooking and Korean herbal practice. The seed extract carries starch-derived sugars and amino acids.
- Citrus Unshiu Peel Extract plant extract
- The peel extract of the satsuma mandarin, the gyul grown on Jeju. It carries flavonoids and aromatic oils and is used as a conditioning antioxidant extract.
- Castanea Crenata (Chestnut) Shell Extract plant extract
- Chestnut Shell Extract carries tannins and is used as an antioxidant plant extract, most often in formulas aimed at visible pores.
- Linalool fragrance component
- Linalool is a floral aromatic found in lavender, bergamot and coriander. It is one of the 26 fragrance components EU labelling requires to be declared by name.
- Dioscorea Japonica Root Extract plant extract
- Dioscorea Japonica is Japanese wild yam, whose root is naturally slippery with mucilage. Its extract hydrates and leaves a cushioned feel.
- Dextrin thickener
- Dextrin is a starch fragment used to thicken and to give a formula a light, powdery finish. It is also a common carrier for powdered extracts.
- Theobroma Cacao (Cocoa) Extract plant extract
- Cocoa Extract carries polyphenols and a little caffeine. It is used as an antioxidant plant extract and gives a faint warm tint.
- Rubus Idaeus (Raspberry) Fruit Extract plant extract
- Raspberry fruit extract, carrying fruit acids, sugars and anthocyanins. It is used as an antioxidant-rich conditioning extract.
- Ulmus Davidiana Root Extract plant extract
- Ulmus Davidiana is Japanese elm, whose inner bark yields a naturally slippery mucilage. Korean formulas use the root extract for that cushioned feel and for the look of reactive skin.
- Salicornia Herbacea Extract plant extract
- Glasswort, the hamcho that grows on Korean tidal flats. It concentrates sea minerals as it grows, so its extract is used as a mineral-rich hydrating ingredient.
- Morus Alba Leaf Extract plant extract
- White mulberry leaf extract, the leaf silkworms are fed on. It carries flavonoids and is used as a conditioning antioxidant extract.
- Angelica Keiskei Extract plant extract
- Ashitaba extract, a Japanese angelica relative rich in chalcones. It is used as an antioxidant conditioning extract.
- 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.
- Tocopherol antioxidant
- Tocopherol is vitamin E. It is an oil-soluble antioxidant that protects the oils in a formula from going rancid and works on skin as an emollient, and it is regularly paired with vitamin C because each keeps the other going for longer.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809803584142
- Made in
- Republic of Korea
- Volume
- 50 ml
- Category
- Cleanser
- 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.
Inside the formula
Inside the formula
Worth knowing
- Keep it out of the eyes and rinse immediately with water if it gets in.
- A cleanser that foams well can still over-dry skin if left on too long, so do not let it sit before rinsing.
Complete the routine
- This itemSulwhasoo Gentle Cleansing Foam$9.40

- Cleanse first, so the next step meets bare skinSulwhasoo Signature Ginseng Facial Soap 120g X 2ea$82.50

- The last step of the morning, over everything elseSulwhasoo MEN UV Defense Protector 50ml SPF50+ PA++++$52.50

Total for 3 items$144.40
Reviews
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Sulwhasoo Gentle Cleansing Foam
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Sulwhasoo, Korean-market original
Korean-market cleanser from Sulwhasoo: Gentle Cleansing Foam, the same formula sold on shelves 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.
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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