Round Lab
Birch Juice Moisturizing Ampoule 50ml
Round Lab Birch Juice Moisturizing Ampoule 50ml is a concentrated ampoule for skin that feels tight and dehydrated by midday.
No reviews yet50 ml
$80.00 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Dry skinDehydrated skinNormal 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
This is an ampoule, which means a small dose of a thicker, more concentrated liquid rather than a layer you spread everywhere. It goes on in drops rather than in palmfuls, and the surface feels slightly denser afterwards than it does after an essence. 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 toner prepares the surface and a cream closes it, while the ampoule is the part of the routine doing the specific work. The result you can judge yourself is whether your skin still feels comfortable hours after you finish your routine.
Key benefits
- Birch Juice Moisturizing Ampoule 50ml is Round Lab's serum, 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 Ampoule 50ml?
It is a concentrated ampoule 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 on after your toner or essence and before your cream, which is the thin to thick order. The result you can judge yourself is whether your skin still feels comfortable hours after you finish your routine.
Where does Birch Juice Moisturizing Ampoule 50ml go in my routine?
It goes on after your toner or essence and before your cream, which is the thin to thick order. In practice: Press two or three drops over the areas that need it after your toner, then seal with your usual moisturiser. Applying it out of that order is the usual reason a step seems to do nothing.
Is Birch Juice Moisturizing Ampoule 50ml 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.
Do I still need a moisturiser on top of an ampoule?
Yes. An ampoule is a concentrated step, not an occlusive one, so it has nothing to hold the water it leaves behind. Follow it with your usual cream or emulsion, and choose a richer one in winter. Skipping the cream is the most common reason a good ampoule leaves skin feeling tight an hour later.
Is this Birch Juice Moisturizing Ampoule 50ml the authentic Korean-market formula?
Yes. We stock the Round Lab Korean-market formula rather than a version reformulated for US shelves. The bottle you open is the 50ml 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, essential oils, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (40): Water, Methylpropanediol, Glycerin, 1,2-Hexanediol, Polyglyceryl-3, Caprylic/Capric Tryglycerides, Betula Platyphylla Japonica Juice (10,000ppm), Sodium Hyaluronate, Glyceryl Glucoside, Hydrolyzed Hyaluronic Acid, Butylene Glycol, Hyaluronic Acid, Ascorbic Acid, Beta-Glucan, Dipotassium Glycyrrhizate, Hydrogenated Lecithin, Ethylhexylglycerin, Eclipta Prostrata Leaf Extract, Laminaria Japonica Extract, Avena Sativa Kernel Extract, Cynara Scolymus (Artichoke) Leaf Extract, Pteris Multifida Extract, Melia azadirachta(=Azadirachta indica) Extract, Melia Azadirachta Flower Extract, Coccinia Indica Fruit Extract, Aloe Barbadensis Flower Extract, Solanum Melongena (Eggplant) Fruit Extract, Ocimum Sanctum Leaf Extract, Corallina Officinalis Extract, Curcuma Longa Root Extract, Cyclohexasiloxane, Dipropylene Glycol, Ammonium Acryloyldimethyltaurate/VP Copolymer, Xanthan Gum, Fructooligosaccharides, Carbomer, Disodium EDTA, Polyquaternium-51, Tromethamine, Tocopherol
Ingredient list read from jolse.com on 10 September 2026.
39 of 40 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.
- Methylpropanediol humectant
- Methylpropanediol is a small glycol used to hydrate and to help water-soluble actives penetrate the outer layer of skin more evenly. It leaves almost no tack, which suits watery textures.
- 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.
- 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.
- Polyglyceryl-3 humectant
- Polyglyceryl-3 is three glycerin units joined together. On its own it is a humectant, and it is the backbone the polyglyceryl-3 emulsifiers are built on.
- 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.
- 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.
- 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.
- Hydrolyzed Hyaluronic Acid humectant
- Hydrolyzed Hyaluronic Acid is hyaluronic acid cut into much shorter fragments. The smaller the fragment, the further into the outer layer it can settle, which is why serums stack several sizes together instead of using one.
- 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.
- 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.
- 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.
27 more explained
- Beta-Glucan polysaccharide
- Beta-Glucan is a polysaccharide from oats or yeast. It holds a large amount of water, forms a soothing film, and is one of the ingredients formulators reach for in products aimed at reactive skin.
- Dipotassium Glycyrrhizate active
- Dipotassium Glycyrrhizate is a water-soluble salt derived from licorice root. It is the licorice fraction Korean formulas use for the look of redness, and it is far more stable in water than the whole extract.
- Hydrogenated Lecithin emulsifier
- Hydrogenated Lecithin is lecithin with its unsaturated bonds filled in, which makes it far more stable. It emulsifies and is the standard shell for the liposomes that carry actives into the outer layer of skin.
- 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.
- Eclipta Prostrata Leaf Extract plant extract
- Eclipta Prostrata is false daisy, long used in Ayurvedic and East Asian practice. Its extract is used as a conditioning plant extract, most often in scalp and hair formulas.
- Laminaria Japonica Extract plant extract
- Laminaria Japonica is kombu kelp. Its extract carries alginates, minerals and iodine, and it is used as a hydrating, mineral-rich ingredient.
- Avena Sativa Kernel Extract plant extract
- Oat Kernel Extract carries beta-glucan and avenanthramides, and it is one of the most reliably tolerated ingredients in skincare. It is used for the look of reddened, itchy-feeling skin.
- Cynara Scolymus (Artichoke) Leaf Extract plant extract
- Artichoke Leaf Extract carries cynaropicrin and other plant antioxidants. It is used in formulas aimed at the look of visible pores and dullness.
- Pteris Multifida Extract plant extract
- Spider brake fern extract, a traditional East Asian herbal plant. It is used as a conditioning extract.
- Melia azadirachta(=Azadirachta indica) Extract plant extract
- Neem extract with the plant part unstated. Neem carries limonoid compounds and is a long used botanical in Indian practice, and the extract is used as a conditioning extract.
- Melia Azadirachta Flower Extract plant extract
- Melia Azadirachta is neem. Its leaf and flower extracts are long-standing Ayurvedic ingredients, and Korean formulas use them in products aimed at the look of congested, blemish-prone skin.
- Coccinia Indica Fruit Extract plant extract
- Coccinia Indica is ivy gourd. Its fruit extract is used as a conditioning, hydrating plant extract in Korean formulas.
- Aloe Barbadensis Flower Extract plant extract
- Aloe Flower Extract comes from the flower rather than the leaf gel. It is used as a conditioning plant extract.
- Solanum Melongena (Eggplant) Fruit Extract plant extract
- Eggplant Fruit Extract carries nasunin, the antioxidant pigment in aubergine skin. It is used as an antioxidant plant extract.
- Ocimum Sanctum Leaf Extract plant extract
- Ocimum Sanctum is holy basil, or tulsi. Its leaf extract carries plant antioxidants and is used in formulas built for the look of stressed, reactive skin.
- Corallina Officinalis Extract plant extract
- Corallina Officinalis is coral seaweed, which holds calcium and magnesium in its structure. Its extract is used as a mineral-rich conditioning ingredient.
- Curcuma Longa Root Extract plant extract
- Turmeric Root Extract carries curcuminoids, well studied plant antioxidants. It is used for the look of dullness and uneven tone, and it tints a formula faintly yellow.
- Cyclohexasiloxane silicone
- Cyclohexasiloxane is a volatile silicone used for a light, fast-spreading feel that leaves nothing behind.
- Dipropylene Glycol humectant
- Dipropylene Glycol is a glycol used as a solvent and a light humectant. Its main job is keeping the rest of the formula dissolved and the texture fluid rather than adding hydration of its own.
- Ammonium Acryloyldimethyltaurate/VP Copolymer thickener
- This is a synthetic thickener that gels quickly and holds an emulsion stable across a wide pH range. It gives a light, non-tacky body.
- 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.
- Fructooligosaccharides humectant
- Fructooligosaccharides are short fructose chains used as humectants and as food for the skin's own resident microbes.
- Carbomer thickener
- Carbomer is a synthetic polymer that only gels once a base neutralises it, which is why arginine or tromethamine sits nearby on the list. It gives the clear, non-stringy gel texture a xanthan formula cannot reach.
- 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.
- Polyquaternium-51 film former
- Polyquaternium-51 is a polymer, sometimes sold as Lipidure, built on the same phosphorylcholine structure as a cell membrane. It holds water in a film on the surface and gives a distinctive soft, dry finish.
- Tromethamine pH adjuster
- Tromethamine neutralises acidic thickeners such as carbomer so they gel, and holds a formula near skin-friendly pH. It is used at a fraction of a percent.
- 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)
- 8809864759480
- Made in
- Republic of Korea
- Volume
- 50 ml
- Category
- Serum & Ampoule
- Actives
- Aloe Vera, Beta-Glucan, Birch Sap, Hyaluronic Acid, Licorice Root, 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 after your toner or essence, when the skin is still slightly damp.
- Take two or three drops, press them over the areas that need the work and then over the rest of the face.
- Seal it with your moisturiser, since an ampoule on its own leaves the surface a little tacky.
- Do not use it in place of your moisturiser, and do not start with a full pipette on skin that has not had it before.
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 Ampoule 50ml$40.00

- 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$100.00
Reviews
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Round Lab Birch Juice Moisturizing Ampoule 50ml
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Round Lab, Korean-market original
A concentrated ampoule, 50ml, 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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