Centellian24
Madeca Micro Startoc Serum 50ml
A 50ml serum for the treatment slot of a routine, used after toner and before a cream on normal to combination skin.
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 skinCombination skinDry skinOily skin
- Helps with
- A smoother looking surfaceEveryday treatmentDullnessA steady twice daily routine
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
A serum sits between a toner and a cream in both texture and job: thinner than a moisturiser, heavier than water. It spreads as a thin film that turns from wet to slightly tacky in under a minute, and that tack is the cue to move on. Because it is a leave on layer it stays on the face under everything after it, unlike a rinse off step that leaves with the water. The reason it goes under a cream rather than over one is simple physics: a light fluid cannot sit on top of a heavy occlusive film. At 50ml this is a larger serum than most, which makes it a reasonable choice for someone who wants to use one twice a day without rationing.
Key benefits
- What it is: serum, 50ml, used the treatment step after toner and before a moisturiser.
- Texture: a light fluid that turns tacky and then settles.
- Aimed at: a smoother looking surface, everyday treatment, dullness.
- Original Korean Formula: the version sold on Korean shelves, not a US reformulation.
Inside the formula
Inside the formula
What is the Centellian24 Madeca Micro Startoc Serum 50ml?
It is a 50ml serum used in the treatment slot of a routine, after toner and before a moisturiser. A serum is chosen for what you want to work on rather than for comfort, which is what separates it from a cream. One or two pumps covers a face.
Where does the serum go in my routine?
After cleansing and toner, before emulsion, cream or oil. A serum is the treatment slot, so it wants clean damp skin under it and a moisturiser over it. If you use an exfoliating step, that goes before this rather than after.
Will it pill under makeup?
It should not, provided each layer is given a moment to settle before the next one goes on. Pilling almost always comes from stacking wet on wet rather than from any single product. Press each layer in with flat palms and wait until the surface feels tacky instead of slippery.
Can I use the 50ml morning and night?
Yes, twice a day is a normal way to use a serum, though once at night is enough if the rest of your routine is already long. Consistency at one time of day beats an ambitious routine you abandon after a fortnight. Judge it after four to six weeks rather than after a few days.
Is this the same version sold in Korea?
Yes, this is the Korean-market formula rather than a US reformulation of it. The 50ml comes with Korean primary labelling and an intact barcode, which is what lets you verify what you have received. We hold stock in the United States.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (77): Niacinamide, Rosa Damascena Flower Oil, Dimethicone, Disodium EDTA, Lavandula Angustifolia (Lavender) Oil, Lavandula Angustifolia (Lavender) Extract, Rosmarinus Officinalis (Rosemary) Extract, Magnesium Chloride, Maltodextrin, Methyl Gluceth-10, Anhydroxylitol, Ficus Carica (Fig) Fruit Extract, Citrus Aurantium Bergamia (Bergamot) Fruit Oil, Behenyl Alcohol, Centella Asiatica Leaf Extract, Butylene Glycol, Bisabolol, Saccharum Officinarum (Sugarcane) Extract, Punica Granatum Fruit Extract, Thymus Vulgaris (Thyme) Extract, Ceteareth-20, Cetearyl Alcohol, Pelargonium Graveolens Flower Oil, Sodium Polyacrylate, Prunus Amygdalus Dulcis (Sweet Almond) Seed Extract, Stearic Acid, Silica, Artemisia Absinthium Extract, Adenosine, Asiaticoside, Asiatic Acid, Cedrus Atlantica Bark Oil, Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer, Morus Alba Fruit Extract, Citrus Aurantium Dulcis (Orange) Oil, Octanediol, Olea Europaea (Olive) Fruit Oil, Citrus Grandis (Grapefruit) Peel Oil, Ginkgo Biloba Nut Extract, Inulin Lauryl Carbamate, Isocetyl Stearate, Cananga Odorata Flower Oil, Xylitol, Xylitylglucoside, Xanthan Gum, Rose Flower Oil, Jasminum Officinale (Jasmine) Oil, Chondrus Crispus Extract, Caprylic/Capric Triglyceride, Copaifera Officinalis (Balsam Copaiba) Resin, Tromethamine, Panthenol, Palmitoyl Tripeptide-5, Palmitic Acid, Phenoxyethanol, Pentylene Glycol, Polyglyceryl-10 Stearate, Propanediol, PEG-14M, Phytosteryl Macadamiate, Hydrogenated Lecithin, Hydrolyzed Vegetable Protein, Helianthus Annuus (Sunflower) Seed Oil, 1,2-Hexanediol, Yeast Extract, Hydrolyzed Hyaluronic Acid, Ferula Galbaniflua (Galbanum) Resin Oil, Limonia Acidissima Extract, Origanum Vulgare Flower/Leaf/Stem Extract, Ceramide NP, Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate, Thuja Occidentalis Leaf Oil, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Madecassic Acid, Centella Asiatica Extract, PEG-60 Hydrogenated Castor Oil
Ingredient list read from inkeedecoder.com on 10 September 2026.
72 of 77 explained
- 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.
- Rosa Damascena Flower Oil fragrance component
- Rosa Damascena Flower Oil is rose essential oil, one of the most expensive materials in perfumery. It scents a formula, and like every essential oil it is a class reactive skin often does not tolerate.
- 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.
- 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.
- Lavandula Angustifolia (Lavender) Oil fragrance component
- Lavender Oil is an essential oil carrying linalool and linalyl acetate. It scents a formula, and linalool is one of the fragrance components EU labelling requires to be named separately.
- Lavandula Angustifolia (Lavender) Extract plant extract
- Lavender extract, the water-soluble fraction rather than the essential oil. It is used as a conditioning extract and carries a light lavender scent.
- Rosmarinus Officinalis (Rosemary) Extract plant extract
- Rosemary extract with the plant part unstated. Rosemary carries rosmarinic and carnosic acid, and it is also used to keep the oils in a formula from going rancid.
- Magnesium Chloride mineral
- Magnesium Chloride is the magnesium salt that makes sea water taste bitter. In a formula it is a mineral salt in the water phase and helps set gum gels.
- Maltodextrin film former
- Maltodextrin is a starch-derived sugar chain used to carry powdered extracts and to form a light film. It also gives a soft, smoothing feel.
- Methyl Gluceth-10 humectant
- A sugar-derived humectant, the lighter counterpart of methyl gluceth-20. It holds water and gives a smooth, non-tacky slip.
- Anhydroxylitol humectant
- Anhydroxylitol is a xylitol derivative used as a humectant. It is almost always part of the xylitol, anhydroxylitol and xylitylglucoside blend sold as a moisture-retention complex.
- Ficus Carica (Fig) Fruit Extract plant extract
- Fig Fruit Extract carries fruit sugars, mild acids and a protein-digesting enzyme. It is used as a hydrating extract with a light smoothing effect.
60 more explained
- Citrus Aurantium Bergamia (Bergamot) Fruit Oil fragrance component
- Bergamot Fruit Oil is a citrus essential oil and the top note of eau de cologne. It scents a formula; citrus oils are the aromatic class most likely to bother reactive skin.
- Behenyl Alcohol fatty alcohol
- Behenyl Alcohol is a long-chain fatty alcohol used to thicken and stabilise a cream. It gives a richer, more velvety body than cetyl alcohol.
- Centella Asiatica Leaf Extract plant extract
- Centella Asiatica is the plant behind the whole cica category, sold as gotu kola or Madagascar centella. Its extract is the anchor of Korean formulas built for easily reddened skin, and its work is done by four triterpenes: asiaticoside, madecassoside, asiatic acid and madecassic acid.
- 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.
- Bisabolol active
- Bisabolol is the main active fraction of chamomile oil, usually supplied from candeia wood. It is used for the look of redness in formulas for reactive skin, and it helps other ingredients absorb.
- Saccharum Officinarum (Sugarcane) Extract plant extract
- Sugarcane Extract carries natural glycolic acid and sugars. In cosmetics it is used as a humectant; the acid content is far too low to work as an exfoliant.
- Punica Granatum Fruit Extract plant extract
- Pomegranate fruit extract, carrying ellagic acid and punicalagins. It is used as a plant antioxidant.
- Thymus Vulgaris (Thyme) Extract plant extract
- Thyme extract, carrying the phenols thymol and carvacrol. It is used as an antioxidant plant extract and resists microbes.
- Ceteareth-20 emulsifier
- An ethoxylated fatty alcohol that holds oil and water together in a cream. The number records how much ethylene oxide was added, which sets how water-loving it is.
- 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.
- Pelargonium Graveolens Flower Oil fragrance component
- Pelargonium Graveolens is rose geranium. Its flower oil is an essential oil used to scent a formula, carrying citronellol and geraniol.
- Sodium Polyacrylate thickener
- Sodium Polyacrylate is a polymer that absorbs many times its weight in water. It thickens a formula and holds water in a gel against the skin.
- Prunus Amygdalus Dulcis (Sweet Almond) Seed Extract plant extract
- Sweet almond seed extract, the water-soluble fraction rather than the pressed oil. It carries proteins and sugars and is used as a conditioning extract.
- Stearic Acid fatty acid
- Stearic Acid is a saturated fatty acid from plant fats, and one of the three lipid classes skin's own barrier is built from. In a formula it thickens, stabilises the emulsion and can be turned into a soap-style cleanser by adding a base.
- Silica absorbent
- Silica is finely milled mineral, essentially very pure sand. It absorbs oil, stops powders clumping and soft-focuses the look of pores and fine lines.
- Artemisia Absinthium Extract plant extract
- Artemisia Absinthium is wormwood, another mugwort relative. Its extract carries aromatic plant compounds and is used as a conditioning extract.
- 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.
- Asiaticoside active
- Asiaticoside is one of the four active triterpenes isolated from centella and the most studied of them. Korean formulas name it separately when they want to show which fraction of the plant they standardised.
- Asiatic Acid active
- Asiatic Acid is the third of centella's four triterpenes and the aglycone form, meaning it has no attached sugar. It is oil soluble, so it turns up in cica creams and balms more than in watery layers.
- Cedrus Atlantica Bark Oil fragrance component
- Atlas Cedar Bark Oil is a woody essential oil used to scent a formula.
- Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer thickener
- A gelling polymer that thickens and emulsifies at once. It gives the light, non-sticky gel texture Korean essences are known for.
- Morus Alba Fruit Extract plant extract
- White mulberry fruit extract. It carries anthocyanins and fruit acids and is used as a conditioning antioxidant extract, while the root bark of the same plant is used for tone.
- Citrus Aurantium Dulcis (Orange) Oil fragrance component
- Sweet Orange Peel Oil is a citrus essential oil carrying limonene. It scents a formula, and limonene is one of the components EU labelling names separately.
- Octanediol preservative booster
- A glycol that hydrates and, like the other longer-chain glycols, makes a formula less hospitable to microbes so the preservative system can be lighter.
- Olea Europaea (Olive) Fruit Oil emollient
- Olive Fruit Oil is high in oleic acid and plant sterols. It is a rich emollient that suits dry skin and is heavy enough that blemish-prone skin often does not get on with it.
- Citrus Grandis (Grapefruit) Peel Oil fragrance component
- Grapefruit Peel Oil is a citrus essential oil rich in limonene. It scents a formula and belongs to the aromatic class reactive skin often avoids.
- Ginkgo Biloba Nut Extract plant extract
- Ginkgo nut extract, the eunhaeng eaten in Korea. It carries flavonoids and is used as a conditioning antioxidant extract.
- Inulin Lauryl Carbamate emulsifier
- A chicory-sugar polymer with a fatty chain attached. It stabilises an emulsion by forming a film at the oil and water boundary rather than acting as a classic surfactant.
- Cananga Odorata Flower Oil fragrance
- Ylang ylang oil, a heavy sweet floral essential oil. It is among the most commonly declared natural fragrance materials.
- Xylitol humectant
- Xylitol is a sugar alcohol humectant. It holds water in the outer layer of skin and is often paired with anhydroxylitol and xylitylglucoside as a hydration trio.
- Xylitylglucoside humectant
- Xylitylglucoside is a sugar-derived humectant, the third member of the xylitol blend. Together the three hold water in the outer layer for longer than any of them does alone.
- 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.
- Jasminum Officinale (Jasmine) Oil fragrance
- Jasmine oil, an intensely floral aromatic used in very small amounts. It is a fragrance ingredient.
- Chondrus Crispus Extract plant extract
- Chondrus Crispus is Irish moss, a red seaweed. It is loaded with carrageenan, so it hydrates and thickens at once, and it leaves a cushioned, slippery film.
- Caprylic/Capric Triglyceride emollient
- Caprylic/Capric Triglyceride is the light fraction of coconut oil, with the heavy parts removed. It is the workhorse emollient of modern formulas: it softens skin, dissolves oil-soluble actives and absorbs without the greasy weight of a whole plant oil.
- Copaifera Officinalis (Balsam Copaiba) Resin emollient
- Copaiba Resin is a fragrant tree resin used as a thick emollient and a natural scent component in balms.
- 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.
- 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.
- Palmitoyl Tripeptide-5 peptide
- Palmitoyl Tripeptide-5 is a fatted three-amino-acid peptide used for the look of firmness and fine lines. The palmitoyl tail is what lets it cross an oily surface.
- Palmitic Acid fatty acid
- Palmitic Acid is a saturated fatty acid present in skin's own lipids. It thickens a formula, stabilises the emulsion and softens skin.
- Phenoxyethanol preservative
- Phenoxyethanol is the most widely used cosmetic preservative outside the paraben family. It keeps a water-containing formula from growing bacteria and mould, and is capped at one percent in most markets, so it always sits low on a list.
- 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.
- Polyglyceryl-10 Stearate emulsifier
- Polyglyceryl-10 Stearate is a mild sugar-derived emulsifier that holds oil into water and thickens slightly.
- Propanediol humectant
- Propanediol is a plant-derived glycol used in place of propylene glycol. It hydrates, carries actives into solution, and gives a lighter, less sticky slip than glycerin at the same strength.
- PEG-14M thickener
- A high molecular weight polyethylene glycol. The M records the very long chain, which is what makes it thicken water and give a slippery, cushioned slip.
- 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.
- Hydrolyzed Vegetable Protein protein
- Hydrolyzed Vegetable Protein is plant protein cut into water-soluble fragments. It forms a light conditioning film that holds water at the surface.
- Helianthus Annuus (Sunflower) Seed Oil emollient
- Sunflower Seed Oil is high in linoleic acid, the fatty acid dry and blemish-prone skin is often short of. It is a light, non-fragrant emollient and one of the better tolerated plant oils.
- 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.
- Yeast Extract ferment
- The soluble contents of yeast cells, carrying amino acids, peptides, sugars and B vitamins. It is used as a conditioning ingredient and as a source of beta glucan.
- 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.
- Ferula Galbaniflua (Galbanum) Resin Oil fragrance component
- Galbanum Resin Oil is a green, resinous essential oil used in perfumery to scent a formula.
- Origanum Vulgare Flower/Leaf/Stem Extract plant extract
- Oregano extract from the whole plant above ground, rich in the phenols carvacrol and thymol. It is used as an antioxidant plant extract.
- 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.
- Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate peptide
- A synthetic peptide sold as Syn-Ake, built to mimic a peptide sequence found in snake venom. It is used for the look of expression lines.
- Thuja Occidentalis Leaf Oil fragrance
- Northern white cedar leaf oil, a sharp coniferous essential oil used at very low levels for scent.
- Acrylates/C10-30 Alkyl Acrylate Crosspolymer thickener
- This is a carbomer relative with fatty side chains, so it thickens and stabilises an emulsion at the same time. It gives a light gel-cream body rather than a heavy one.
- Dipeptide Diaminobutyroyl Benzylamide Diacetate peptide
- This is a two-amino-acid peptide, sold as Syn-Ake, used for the look of expression lines. Its structure was modelled on a component of snake venom, though nothing of the venom itself is in it.
- Madecassic Acid active
- Madecassic Acid is the fourth centella triterpene. A list that names all four is telling you the extract was standardised rather than simply pressed, which is the difference between a cica claim and a cica formula.
- PEG-60 Hydrogenated Castor Oil emulsifier
- PEG-60 Hydrogenated Castor Oil is a castor-oil-derived solubiliser. It is what keeps fragrance and oil-soluble ingredients dissolved in a watery formula so it stays clear.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8806109191876
- Made in
- Republic of Korea
- Volume
- 50 ml
- Category
- Serum & Ampoule
- Actives
- Adenosine, Bisabolol, Centella Asiatica, Ceramide NP, Hyaluronic Acid, Niacinamide, Panthenol, Peptides, Urea
- 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
- Cleanse and tone, then apply this while the skin is still slightly damp so it spreads without dragging.
- Use one or two pumps for the whole face and press it in with flat palms rather than rubbing in circles.
- Wait until the surface feels tacky rather than wet, then put your moisturiser on top.
- Do not use it as your only layer on dry skin, since a light fluid left uncovered is the first thing to evaporate.
Worth knowing
- Introduce it on its own for a week before adding another new treatment step.
- Patch test on the jawline first if your skin reacts easily to something new.
Complete the routine
- This itemCentellian24 Madeca Micro Startoc Serum 50ml$42.50
- Prep after cleansing, before the treatment stepCENTELLIAN24 Madeca Cica Mist 100ml$22.50
- Cleanse first, so the next step meets bare skinCENTELLIAN24 Madeca Enzyme Cleansing Powder 60g$27.50
Total for 3 items$92.50
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CENTELLIAN24 Madeca Micro Startoc Serum 50ml
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
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Centellian24, Korean-market original
A 50ml treatment serum for the step after toner, stocked in the Original Korean 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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