Rose Galactomyces Synergy Serum 50ml
IUNIK's Rose Galactomyces Synergy Serum is a 50ml leave-on treatment pairing rose with galactomyces ferment filtrate, a fermented ingredient related to the one made famous by SK-II, for skin that wants a fermentation-forward hydrating serum.
No reviews yet50 ml
$85.00 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Normal to dry skin wanting a fermentation-based serum
- Helps with
- Hydration and conditioning
In stock. Arrives in 3 to 7 business days
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- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
The Rose Galactomyces Synergy Serum is a 50ml serum, used after toner and before moisturizer, morning and evening. The ferment it is built around is Galactomyces Ferment Filtrate, named first on its own ingredient list. The same list carries Niacinamide, Adenosine and Dipotassium Glycyrrhizate, so the ferment is not the only thing on it worth naming. How much of the Galactomyces Ferment Filtrate stays on the skin, and for how long, is decided by the serum format rather than by the list alone. This is the Original Korean Formula, the serum IUNIK sells in Korea, Galactomyces Ferment Filtrate and all.
Key benefits
- Galactomyces Ferment Filtrate, the ferment this serum is built around
- Niacinamide, Adenosine, Dipotassium Glycyrrhizate and Allantoin on the same list, actives
- Aspalathus Linearis (Rooibos) Extract and Glycyrrhiza Glabra (Licorice) Root Extract further down the same list
- Perilla Frutescens Leaf Extract and Arginine further down the same list
- Galactomyces Ferment Filtrate named first on the manufacturer list printed on this page
- The Korean-market release of this serum, confirmed against its Korean barcode
Where does this serum go in my routine?
After toner and before moisturizer, morning and evening. Anything thinner than a serum goes on before it, and anything richer goes on after. If you are adding it to a routine you already like, give it a week on its own first, so what you see is the Galactomyces Ferment Filtrate and not three changes at once.
Is this the Korean-market serum or a US version?
The Korean-market one, Galactomyces Ferment Filtrate and all. We match this serum to its Korean barcode before it reaches the shelf, which is the check that tells you which market release you are holding.
What else is on the list besides Galactomyces Ferment Filtrate?
Niacinamide, Adenosine and Dipotassium Glycyrrhizate. The order they are printed in on this serum's panel is the order on the box, so you can see where Galactomyces Ferment Filtrate sits relative to them. Further down the same panel: Allantoin, Aspalathus Linearis (Rooibos) Extract and Glycyrrhiza Glabra (Licorice) Root Extract.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, essential oils, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (21): Galactomyces Ferment Filtrate, Water, Rosa Centifolia Flower Water, Glycerin, Butylene Glycol, Niacinamide, 1,2-Hexanediol, Caprylyl Glycol, Carbomer, Arginine, Sodium Hyaluronate, Ethylhexylglycerin, Adenosine, Dipotassium Glycyrrhizate, Allantoin, Pentylene Glycol, Aspalathus Linearis Extract, Glycyrrhiza Glabra (Licorice) Root Extract, Commiphora Myrrha Resin Extract, Perilla Frutescens Leaf Extract, Yucca Schidigera Root Extract
Ingredient list read from incidecoder.com on 10 September 2026.
19 of 21 explained
- Galactomyces Ferment Filtrate ferment
- Galactomyces Ferment Filtrate is a yeast ferment filtered clear, the ingredient that made the Korean and Japanese essence category. It carries amino acids, vitamins and organic acids and is used for the look of dullness and rough texture.
- 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.
- Rosa Centifolia Flower Water plant extract
- Cabbage rose flower water, the aromatic distillate left after steam distilling the petals. It is used in place of plain water and carries a light rose scent.
- 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.
- 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.
- Niacinamide active
- Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. It is used at roughly 2 to 5 percent for the look of uneven tone and visible pores, and it is water soluble, stable and comfortable beside almost every other active, which is why it turns up in so many lists.
- 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.
- 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.
- 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.
- Arginine amino acid
- Arginine is an amino acid that does two jobs here: it holds water in the outer layer of skin, and it neutralises acidic gelling agents, which is why it often stands in for a synthetic pH adjuster.
- 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.
- 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.
7 more explained
- Adenosine active
- Adenosine is a nucleoside that Korea's own cosmetic authority recognises as a wrinkle-care functional ingredient, which is why it appears on so many Korean lists at a low level. It is used for the look of fine lines and is stable and well tolerated.
- 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.
- 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.
- 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.
- Aspalathus Linearis Extract plant extract
- Rooibos extract, from the South African red bush. It carries aspalathin and other flavonoids and no caffeine, and it is used as a plant antioxidant.
- Glycyrrhiza Glabra (Licorice) Root Extract plant extract
- Licorice Root Extract carries glabridin and liquiritin. It is one of the classic plant ingredients used for the look of uneven tone and redness, and it appears in almost every brightening formula that avoids synthetic actives.
- Perilla Frutescens Leaf Extract plant extract
- Kkaennip, the perilla leaf eaten across Korea. Its extract carries rosmarinic acid and is used as an antioxidant conditioning extract.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809728080385
- Made in
- Republic of Korea
- Volume
- 50 ml
- Category
- Serum & Ampoule
- Actives
- Adenosine, Allantoin, Licorice Root, Niacinamide, 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.
Inside the formula
Inside the formula
How to use
- After toner, before moisturizer.
- Apply a few drops over the face and neck.
- Follow with a moisturizer.
Complete the routine
- This itemIUNIK Rose Galactomyces Synergy Serum 50ml$42.50

- An as-needed step, in place of the prep layeriUNIK Lime Moisture Mild Peeling Gel 90ml$32.50

- The treatment step of this routineiUNIK Noni Light Oil Serum 50ml$55.00

Total for 3 items$130.00
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iUNIK Rose Galactomyces Synergy Serum 50ml
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IUNIK, Korean-market original
The Original Korean Formula serum from IUNIK, 50ml formulated with Galactomyces Ferment Filtrate and Niacinamide, shipped from California or direct from 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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