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Porexsome CollaBooster Poreshot Cream$19.99COSRX
Oil-Free Ultra Moisturizing Lotion with Birch Sap
COSRX's oil-free birch sap lotion, a light finish for oily and combination skin, worn as the last step morning and evening.
No reviews yet100ml
$23.99 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- OilyCombinationNormal
- Helps with
- Oily and combination skin wanting hydration without weightPost-cleansing tightnessA lightweight AM lotion under sunscreen
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$19.99
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VT PDRN Capsule Cream 100VT Cosmetics
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Key benefits
- Birch sap leads the list at position one; plain water does not appear until twenty-two of twenty-four
- Dimethicone at four gives an oil-free lotion its glide without a heavy after-feel
- Allantoin and panthenol work mid list for comfort without adding richness
- Sodium hyaluronate near the end still holds water at the surface, small as its position suggests the amount is
- A fast-absorbing texture built for oily or combination skin that finds most creams too heavy
- COSRX verifies this unit itself: batch and expiry check on the brand's own site, not ours
Key actives
1Betula Platyphylla Japonica JuiceThe primary carrier of the formula, replacing water as the base
First on the list, ahead of every other ingredient including plain water, which trails at position twenty-two. Birch sap is a traditional Korean spring-tapped ingredient valued for a light, non-greasy hydration; running it as the actual base rather than a late addition is what the product name is describing.
4DimethiconeA silicone that gives an oil-free formula its slip without weight
Fourth on the list. It is what lets a water-thin lotion spread evenly and finish smooth rather than patchy, without introducing the heaviness of a plant or mineral oil.
15AllantoinA soothing agent supporting comfort on freshly cleansed or exfoliated skin
Fifteenth on the list, paired with panthenol just after it. Both are classic Korean-formulation comfort ingredients, included here to offset any tightness from a genuinely lightweight, low-oil lotion.
19Sodium HyaluronateA humectant near the end of the list, holding water at the surface
Nineteenth of twenty-four ingredients. Its position means it is a supporting humectant rather than the formula's main hydration source, which is the birch sap base doing the bulk of that work.
Inside the formula
Inside the formula
- 1Betula Platyphylla
- 4Dimethicone
- 15Allantoin
- 19Sodium Hyaluronate
Where each key active sits on the declared ingredient list, by entry number. Position is proportion: the further forward, the larger its share.
COSRX Oil-Free Ultra Moisturizing Lotion with Birch Sap
What does the COSRX Birch Sap Lotion actually do?
It is a lightweight, oil-free lotion built on birch sap as its primary base rather than water: birch sap leads the ingredient list, and plain water does not appear until position twenty-two of twenty-four. Dimethicone gives it glide, and allantoin, panthenol and sodium hyaluronate carry the hydration and comfort side, for skin that wants water without weight.
Does it contain fragrance?
Yes. Parfum sits at position fourteen, with limonene and citral declared as its allergen components. If you avoid added fragrance specifically, this is the one product in the birch sap family to check the list on before buying.
Is it too light for dry skin?
It can be. This is built for oily and combination skin as a fast-absorbing daily lotion, and on genuinely dry or dehydrated skin it usually needs a richer cream layered over it, especially in colder months.
Can I use this under sunscreen and makeup?
Yes, that is exactly the finish it is built for. The texture sets to a soft matte within about a minute with no oily residue, which is what lets sunscreen and makeup sit on top without sliding.
How does this compare to buying COSRX from a US retailer?
COSRX verifies units itself. Find the verification page on cosrx.com and enter the batch number and expiration date printed on your unit, read off the package rather than from us, which is the point. 8809416470559, and batch code intact under the box.
Not on the ingredient list below: denatured or SD alcohol, essential oils, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (24): Betula Platyphylla Japonica Juice, Butylene Glycol, Glycerin, Dimethicone, Betaine, Cetearyl Alcohol, 1,2-Hexanediol, Cetearyl Olivate, Ethyl Hexanediol, Sorbitan Olivate, Ethylhexylglycerin, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Sodium Acryloyldimethyltaurate/VP Crosspolymer, Parfum, Allantoin, Panthenol, Xanthan Gum, Sodium Lactate, Sodium Hyaluronate, Sorbitan Isostearate, Polysorbate 60, Water, Limonene, Citral
Ingredient list read from inkeedecoder.com on 10 September 2026.
23 of 24 explained
- Betula Platyphylla Japonica Juice 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.
- 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.
- Dimethicone silicone
- Dimethicone is the most used cosmetic silicone. It forms a breathable film that smooths the surface, slows water leaving skin, and gives the slip that makes a primer or cream feel silky. It is inert and does not penetrate.
- Betaine humectant
- Betaine is a sugar-beet-derived humectant that cells use to hold water. In a formula it hydrates and takes the edge off cleansers and acids, which is why it often appears alongside them.
- Cetearyl Alcohol fatty alcohol
- Cetearyl Alcohol is a waxy solid, not the drying kind of alcohol. It is a blend of cetyl and stearyl alcohols used to thicken a cream and keep oil and water from separating, and it softens skin as it does so.
- 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.
- Cetearyl Olivate emulsifier
- Cetearyl Olivate is the water-loving half of the olive-derived emulsifier pair. With sorbitan olivate it builds emulsions whose lipid profile is close to skin's own.
- Ethyl Hexanediol humectant
- Ethyl Hexanediol is a glycol that hydrates and makes a formula less hospitable to microbes, the same double role 1,2-hexanediol plays.
- Sorbitan Olivate emulsifier
- Sorbitan Olivate is an olive-derived emulsifier, the oil-loving half of the pair sold as Olivem. It holds oil into water and leaves a light, non-waxy feel.
- 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.
- Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer thickener
- This is the thickener behind most gel-cream textures. It builds a soft, bouncy gel that collapses to a light fluid as it is rubbed in.
11 more explained
- 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.
- Allantoin active
- Allantoin is a comfrey-derived compound used to condition skin and soften the outer layer so it feels smoother. It is one of the standard additions to a formula built for easily irritated skin.
- Panthenol humectant
- Panthenol is pro-vitamin B5: skin converts it to pantothenic acid. It is a humectant that holds water and leaves skin feeling soft and less tight, and it is one of the ingredients formulators reach for when a formula also contains something harsh.
- Xanthan Gum thickener
- Xanthan Gum is a polysaccharide made by fermenting sugar. It thickens a watery formula into a gel and holds the whole thing in suspension so nothing separates. Too much of it and a serum turns stringy, which is why it appears in fractions of a percent.
- Sodium Lactate humectant
- Sodium Lactate is the salt of lactic acid and one of the components of skin's own natural moisturising factor. At the levels used here it is a humectant and buffer rather than an exfoliant.
- 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.
- Sorbitan Isostearate emulsifier
- Sorbitan Isostearate is a mild emulsifier that holds water into oil, the direction a cleansing balm or an oil-based cream needs.
- Polysorbate 60 emulsifier
- Polysorbate 60 is a water-loving emulsifier used with a fatty co-emulsifier to build stable lotions and creams.
- 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.
- 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.
- Citral fragrance component
- Citral is a sharp lemon aromatic found in lemongrass and citrus oils. It is one of the 26 fragrance components EU labelling requires to be named.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809416470559
- Made in
- Republic of Korea
- Volume
- 100ml
- Category
- Moisturizer / Lightweight lotion
- Actives
- Allantoin, Birch Sap, Panthenol, Sodium Hyaluronate
- 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 it works
An oil-free lotion is for skin that wants the sealing step without the weight of a cream, which is a real gap in most routines. This is COSRX's birch sap lotion, and the name is doing the work: it is a lotion rather than a cream, and the finish is light. It goes on last, over serum, morning and evening, and in the morning sunscreen follows it. Skin that turns shiny by midday but still tightens after cleansing is the case it fits. Twice a day, and on dry patches a richer cream can go over the top of it at night.
How to use
- Use the Oil-Free Ultra Moisturizing Lotion with Birch Sap as the last skincare step, morning and evening, over serum.
- One or two pumps for the face and neck, pressed in with flat palms rather than rubbed.
- Serum first, this second, then sunscreen in the morning. On dry skin a richer cream can go over it at night.
- Twice a day. Do not decant it into a smaller jar to travel with; an emulsion in a pump is packaged that way to keep it stable.
Worth knowing
- This formula contains parfum, with limonene and citral declared as its allergen components. If you avoid added fragrance, this is not the birch sap product for you.
- Cetearyl alcohol and cetearyl olivate are fatty alcohol emulsifiers, not the drying solvent alcohol; they will not sting.
- This is a genuinely light lotion, not a rich cream. On dry or very dehydrated skin it usually wants a heavier layer on top in cold weather.
Reviews
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COSRX Oil-Free Ultra Moisturizing Lotion with Birch Sap
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
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COSRX, Korean-market original
Birch sap lotion, 100 ml, birch sap first, water 22nd of 24.
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.
COSRX verifies units itself. Find the verification page on cosrx.com and enter the batch number and expiration date printed on your unit. Read them off the package rather than from us, which is the point.
Source: COSRX FAQ
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.
It helps to reduce inflammation of the skin and retain moisture to maintain the barrier function of skin.
Dr. Jaishree SharadDermatologist, Femina Allantoin can tone down the dryness of the individual cells. It increases the water content of the skin, which means it helps to hydrate and moisturize.
Wilma Bergfeld, MDDermatologist, Cleveland Clinic
1 more professional perspective
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
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