Deep Vita C Capsule Serum 30ml
Medicube Deep Vita C Capsule Serum 30ml carries six separate vitamin c forms on its own ingredient panel, including Ascorbic Acid, 3-O-Ethyl Ascorbic Acid, Ascorbyl Glucoside, Magnesium Ascorbyl Phosphate.
No reviews yet30 ml
$166.67 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- normal skincombination skindry skin
- Helps with
- uneven tone and dullnessgeneral day-to-day maintenance as part of a full routinea routine that wants a Korean-market step in this category
In stock. Arrives in 3 to 7 business days
We accept
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- 30-day returns
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- Tracked delivery to your door
How it works
The panel on this serum names six forms of vitamin c rather than one: Ascorbic Acid, 3-O-Ethyl Ascorbic Acid, Ascorbyl Glucoside, Magnesium Ascorbyl Phosphate, Sodium Ascorbyl Phosphate, Ascorbyl Tetraisopalmitate. 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. On this panel it sits alongside Hippophae Rhamnoides Water, Niacinamide and Gluconolactone. Hippophae Rhamnoides is sea buckthorn. Its water is used in place of plain water as a base and carries traces of the fruit's vitamins.
Key benefits
- Six forms of vitamin c on one panel, not a single token inclusion
- Hippophae Rhamnoides Water on the same panel, the formula's plant extract
- Niacinamide on the same panel, the formula's active
- 30 ml to a unit
- Korean GS1 barcode matched against a Korea sourcing supplier's record for this item
How to use
- Use this serum as the treatment step right after toner. To apply, smooth or press onto cleansed, toned skin and follow with moisturizer. Keep it to AM/PM unless the packaging states otherwise, and give the rest of the routine a moment to settle before layering the next step.
What does the Deep Vita C Capsule Serum 30ml actually contain?
Its ingredient list is led by Niacinamide, with the rest of the formula built to support that active rather than compete with it. We list the ingredients in the order the manufacturer prints them, so the ones near the top of the panel are doing the most work in the formula.
How do I use the Deep Vita C Capsule Serum 30ml?
Use this serum as the treatment step right after toner. To apply, smooth or press onto cleansed, toned skin and follow with moisturizer. Keep it to AM/PM unless the packaging states otherwise, and give the rest of the routine a moment to settle before layering the next step. Give it a full bottle or box before judging the result, since most Korean routines are built for steady use rather than a single application.
Is the Deep Vita C Capsule Serum 30ml the same formula sold in Korea, or a US version?
This Deep Vita C Capsule Serum 30ml is the Korean-market formula, not a version reformulated for US shelves. It arrives with its original Korean-market barcode and batch code intact so the formula can be checked against the box on arrival.
Can I use the Deep Vita C Capsule Serum 30ml with other actives in my routine?
Yes, as long as it is used in its own step, the treatment step right after toner, and not layered on top of a product doing the same job. Introduce any new step gradually over the first week or two and keep an eye on how the skin responds before adding a second new active alongside it.
Who is the Deep Vita C Capsule Serum 30ml suited for?
It suits most skin types looking for treatment step right after toner rather than a single acute problem. It comes in a 30ml format. Anyone with a known sensitivity to a specific ingredient should check the full ingredient panel on this page before buying.
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 (54): Hippophae Rhamnoides Water, Glycereth-26, Niacinamide, Glycerin, Water, 1,2-Hexanediol, Diphenylsiloxy Phenyl Trimethicone, Benzyl Glycol, Caprylic/Capric Triglyceride, Isononyl Isononanoate, Diethoxyethyl Succinate, Arginine, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, C12-14 Alketh-12, Octyldodeceth-16, Castor Oil/IPDI Copolymer, Gluconolactone, Ethylhexylglycerin, Allantoin, Xanthan Gum, Adenosine, Disodium EDTA, Panthenol, Dextrin Palmitate, Hydrogenated Lecithin, Olea Europaea (Olive) Fruit Oil, Cholesterol, Dibutyl Ethylhexanoyl Glutamide, Carbomer, Helianthus Annuus (Sunflower) Seed Oil, Glutathione, Ascorbic Acid, Dibutyl Lauroyl Glutamide, Citrus Medica Vulgaris Peel Oil, 3-O-Ethyl Ascorbic Acid, Ascorbyl Glucoside, Xanthophylls, Propanediol, Rosmarinus Officinalis (Rosemary) Leaf Oil, Litsea Cubeba Fruit Oil, Foeniculum Vulgare (Fennel) Oil, Magnesium Ascorbyl Phosphate, Sodium Ascorbyl Phosphate, Sodium Hyaluronate, Tocopherol, Coriandrum Sativum (Coriander) Fruit Oil, Dipropylene Glycol, Mentha Arvensis Leaf Oil, Ascorbyl Tetraisopalmitate, Polyglyceryl-10 Laurate, Hydrolyzed Hyaluronic Acid, Glycine Max (Soybean) Oil, Hydrogenated Phosphatidylcholine, Sodium Acetylated Hyaluronate
Ingredient list read from stylekorean.com on 10 September 2026.
51 of 54 explained
- Hippophae Rhamnoides Water plant extract
- Hippophae Rhamnoides is sea buckthorn. Its water is used in place of plain water as a base and carries traces of the fruit's vitamins.
- Glycereth-26 humectant
- Glycereth-26 is a modified glycerin that hydrates with far less stickiness than glycerin itself. It is a common way to load water into a formula that has to stay light.
- 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.
- 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.
- 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.
- 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.
- Diphenylsiloxy Phenyl Trimethicone silicone
- Diphenylsiloxy Phenyl Trimethicone is a high-shine silicone used where a formula needs gloss without stickiness.
- Benzyl Glycol preservative booster
- Benzyl Glycol is a solvent that also makes a formula less hospitable to microbes, so it appears in preservative blends built without parabens.
- 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.
- Isononyl Isononanoate emollient
- Isononyl Isononanoate is a branched ester used as a dry emollient. It spreads far for its weight and leaves almost no residue, which is why it appears in formulas that have to feel weightless.
- Diethoxyethyl Succinate solvent
- Diethoxyethyl Succinate is a solvent that helps water-resistant actives spread and sink in evenly. It also leaves a light, silky feel.
- 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.
39 more explained
- 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.
- C12-14 Alketh-12 emulsifier
- C12-14 Alketh-12 is a solubiliser used to keep oils and fragrance dissolved in a water-based formula.
- Octyldodeceth-16 emulsifier
- An ethoxylated branched fatty alcohol. It emulsifies and also gives a formula a soft, cushioned slip.
- Castor Oil/IPDI Copolymer film former
- A polymer built from castor oil. It forms a flexible, glossy film, so it is used in lip and long-wear formulas for shine and staying power.
- Gluconolactone exfoliant
- Gluconolactone is a PHA, the gentlest exfoliant class. Its molecule is too large to penetrate quickly, so it smooths the surface without the sting of an AHA, and it is a humectant at the same time.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Dextrin Palmitate thickener
- Dextrin Palmitate is a starch-based gelling agent for the oil phase. It thickens oils into a clear gel and keeps pigment evenly suspended.
- 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.
- 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.
- Cholesterol barrier lipid
- Cholesterol is the third of the three lipids the outer layer of skin is built from, with ceramides and fatty acids. Formulas that carry all three are following the ratio skin itself holds.
- Dibutyl Ethylhexanoyl Glutamide thickener
- An amino-acid-derived oil gellant, usually declared beside its lauroyl partner. Together they turn an oil into a clear, firm gel.
- 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.
- 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.
- 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.
- 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.
- Dibutyl Lauroyl Glutamide thickener
- An amino-acid-derived gelling agent for oils. It sets an oil phase into a clear gel or a stick without a wax.
- 3-O-Ethyl Ascorbic Acid antioxidant
- 3-O-Ethyl Ascorbic Acid is a stable vitamin C derivative that skin converts to ascorbic acid. It survives in a formula far better than pure vitamin C and works at a gentler pH, so it suits skin that finds the pure acid uncomfortable.
- Ascorbyl Glucoside antioxidant
- Ascorbyl Glucoside is vitamin C bound to glucose, which keeps it stable until enzymes in skin release it. It is a mild, slow-release route to a vitamin C formula.
- Xanthophylls antioxidant
- Xanthophyll is the yellow carotenoid family lutein belongs to, found in marigold and leafy greens. It is used as a plant antioxidant and tints a formula yellow.
- 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.
- Rosmarinus Officinalis (Rosemary) Leaf Oil fragrance component
- Rosemary Leaf Oil is an essential oil carrying camphor and cineole. It scents a formula and is a stronger aromatic than most.
- Litsea Cubeba Fruit Oil fragrance
- May chang oil, a bright lemon-scented essential oil pressed from a small Asian tree. Its scent comes mostly from citral, the same aromatic that gives lemongrass its character.
- Magnesium Ascorbyl Phosphate antioxidant
- Magnesium Ascorbyl Phosphate is a stable, water-soluble vitamin C salt. It works at a near-neutral pH, so it suits formulas built for skin that finds pure ascorbic acid stinging.
- Sodium Ascorbyl Phosphate antioxidant
- Sodium Ascorbyl Phosphate is a water-soluble, stable vitamin C salt. It works at near-neutral pH, so it appears in formulas aimed at skin that pure ascorbic acid leaves stinging.
- 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.
- 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.
- 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.
- Mentha Arvensis Leaf Oil fragrance
- Cornmint oil, the main commercial source of menthol. It smells and feels close to peppermint.
- Ascorbyl Tetraisopalmitate antioxidant
- Ascorbyl Tetraisopalmitate is an oil-soluble vitamin C ester, also sold as tetrahexyldecyl ascorbate. Being oil soluble it sits in the oil phase and is far more stable than pure vitamin C.
- Polyglyceryl-10 Laurate emulsifier
- Polyglyceryl-10 Laurate is a sugar-derived emulsifier and solubiliser, mild enough to be a standard choice in Korean essences. It dissolves small amounts of oil into water without any tightening feel.
- 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.
- Glycine Max (Soybean) Oil emollient
- Soybean Oil is a linoleic-rich plant oil used as an emollient. It also carries soy phytosterols and vitamin E.
- Hydrogenated Phosphatidylcholine emulsifier
- Hydrogenated Phosphatidylcholine is the stabilised form of the main lecithin phospholipid. It builds the liposome shells that hold an active together in a formula.
- Sodium Acetylated Hyaluronate humectant
- Sodium Acetylated Hyaluronate is hyaluronic acid modified to be part oil-loving, so it clings to skin instead of rinsing away. Formulators call it the one that stays put.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8800289479977
- Made in
- Republic of Korea
- Volume
- 30 ml
- Category
- Serum & Ampoule
- Actives
- Adenosine, Allantoin, Glutathione, Hyaluronic Acid, Niacinamide, Panthenol, Sea Buckthorn, 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.
Inside the formula
Inside the formula
Worth knowing
- Patch test on the inner arm before the first full-face application, especially on skin that reacts easily to new products.
- Stop use and rinse off if stinging, burning, or new redness shows up rather than pushing through discomfort.
Complete the routine
- This itemMedicube Deep Vita C Capsule Serum 30ml$50.00
- Prep after cleansing, before the treatment stepmedicube Triple Collagen Toner 4.0 140ml$31.00
- Seal the routine in as the last stepmedicube Zero Pore Cream 2.0 50ml$30.00
Total for 3 items$111.00
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medicube Deep Vita C Capsule Serum 30ml
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
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Medicube, Korean-market original
Medicube's Korean-market serum led by Niacinamide, the same formula sold in 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.
Medicube prints a QR code on the inner box. Scan it with your phone camera and it resolves to the brand’s own verification site.
Verify on medicubeverify.com →Source: Medicube packaging and verification site
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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