Premium Galactomyces Serum 50ml
mixsoon Premium Galactomyces Serum 50ml is a serum led by Galactomyces Ferment Filtrate on its own ingredient panel, sourced as the Korean-market formula.
No reviews yet50 ml
$260.00 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- NormalDryCombinationMature
- Helps with
- DehydrationDullnessA concentrated treatment stepUneven texture
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
Galactomyces Ferment Filtrate leads the ingredient panel on this serum. 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. On this panel it sits alongside Niacinamide, Glycine and Glutathione. 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.
Key benefits
- Galactomyces Ferment Filtrate named on this product's own ingredient panel, near the top of it
- Niacinamide on the same panel, the formula's active
- Glycine on the same panel, the formula's amino acid
- 50 ml to a unit
- Korean GS1 barcode matched against a Korea sourcing supplier's record for this item
How to use
- AM and PM, after toner and before moisturizer, as the concentrated treatment step.
What is the mixsoon Premium Galactomyces Serum 50ml for?
It is a serum from mixsoon's Korean-market lineup, meant to sit in the routine as a concentrated treatment step. It ships as the same formula sold in Korea rather than a US-shelf reformulation, so the ingredient list on the box matches what Korean shoppers buy.
When should I use this serum in my routine?
AM and PM, after toner and before moisturizer, as the concentrated treatment step. Give it a minute to settle into the skin before layering the next product on top, and keep the same order every time you use it so you can tell what is actually working.
Can I use this alongside other treatment steps?
Yes, it is designed to sit inside a normal routine rather than replace it. Introduce it on its own for the first week so you know how your skin responds, then layer in other treatment steps as usual.
Is this the same formula sold in Korea, or a US version?
This is the Korean-market mixsoon formula, over-labeled in English for US sale rather than reformulated for the US market. The ingredient list on the box is the same one Korean shoppers see on the shelf.
How long does a bottle typically last with regular use?
That depends on how much is used per application and how many steps sit around it in your routine, since a serum used once or twice daily is used differently from one used weekly.
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 (11): Galactomyces Ferment Filtrate, Butylene Glycol, Niacinamide, Panthenol, Hydrolyzed Hyaluronic Acid, Betaine, Glycine, Glutathione, Alpha-Arbutin, Ectoin, Ceramide NP
Ingredient list read from inkeedecoder.com on 10 September 2026.
11 of 11 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.
- 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.
- 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.
- 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.
- 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.
- Glycine amino acid
- Glycine is the smallest amino acid and one of the free amino acids skin holds to keep water in the outer layer. In a formula it is a humectant and a mild buffer.
- Glutathione antioxidant
- Glutathione is a small peptide the body uses as one of its main antioxidants. In skincare it is used as an antioxidant and for the look of dullness; it is unstable in water, so formulas that carry it are usually built around protecting it.
- Alpha-Arbutin active
- Alpha-Arbutin is a plant-derived compound, related to the sugar-bound form found in bearberry, used for the look of dark spots and uneven tone. It is stable in water and works at skin-friendly pH.
- Ectoin humectant
- Ectoin is a small molecule that microbes in salt flats and hot springs make to survive extreme conditions. In skincare it holds water tightly around itself, which is why it appears in formulas aimed at reactive, easily dehydrated skin.
- Ceramide NP barrier lipid
- Ceramide NP is the most used cosmetic ceramide, the same class of lipid that makes up roughly half the mortar between cells in the outer layer of skin. Added to a cream it slots into that structure, which is why ceramide formulas feel less leaky rather than merely greasy.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809732912566
- Made in
- Republic of Korea
- Volume
- 50 ml
- Category
- Serum & Ampoule
- Actives
- Arbutin, Ceramide NP, Ectoin, Glutathione, Hyaluronic Acid, Niacinamide, Panthenol
- 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
- New to this formula: patch-test on the inner arm and wait a day before applying it to the face.
- Discontinue use if redness, itching, or irritation develops and rinse the area with water.
Complete the routine
- This itemmixsoon Premium Galactomyces Serum 50ml$130.00

- The treatment step of this routinemixsoon Mung Bean Seed Essence 100ml$67.50

- Prep after cleansing, before the treatment stepmixsoon Centella Asiatica Toner 300ml$42.50

Total for 3 items$240.00
Reviews
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mixsoon Premium Galactomyces Serum 50ml
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mixsoon, Korean-market original
mixsoon's Premium Galactomyces Serum is built around Galactomyces Ferment Filtrate, in the 50ml bottle it ships in 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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