Collagen Glow Bubble Serum
Medicube Collagen Glow Bubble Serum is a Korean-market serum built around Soluble Collagen, formulated in Korea and sold here in its original Korean-market formula rather than a US-shelf reformulation.
No reviews yet100ml
$30.99 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
- loss of bounce and firmnessgeneral day-to-day maintenance as part of a full routinea routine that wants a Korean-market step in this category
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Key benefits
- Built around Soluble Collagen, positioned for plumping feel.
- Built around Collagen, positioned for plumping feel.
- Built around Niacinamide, positioned for tone and texture.
- Formulated as a serum for the treatment step right after toner.
- The Korean-market Medicube formula for Collagen Glow Bubble Serum, matching what Medicube sells in Korea rather than a US-reformulated line.
- Arrives with its original Korean-market barcode and batch code intact for authenticity checks against the box.
Key actives
4Soluble CollagenPlumping feel
Soluble Collagen sits near the top of the ingredient list, where the formula puts its heaviest-weighted ingredients. It is an ingredient chosen for plumping feel: a water-soluble collagen fragment that sits on the skin's surface and gives an immediate plumping, cushioned feel without any claim about the skin's own collagen underneath.
9NiacinamideTone and texture
Niacinamide sits near the top of the ingredient list, where the formula puts its heaviest-weighted ingredients. It is an ingredient chosen for tone and texture: a form of vitamin B3 that supports a more even-looking tone and a smoother surface texture with regular use, and layers comfortably under most other actives.
22AdenosineFirming look
Adenosine sits in the middle stretch of the ingredient list, a supporting rather than a headline role. It is an ingredient chosen for firming look: a nucleoside included for its reputation in smoothing the look of fine expression lines, one of the more established anti-aging ingredients in Korean formulation.
23AllantoinComfort
Allantoin sits in the middle stretch of the ingredient list, a supporting rather than a headline role. It is an ingredient chosen for comfort: a comfort ingredient with a long safety record, added to keep the finish gentle on skin that is dealing with dryness or mild sensitivity.
46CollagenPlumping feel
Collagen sits near the top of the ingredient list, where the formula puts its heaviest-weighted ingredients. It is an ingredient chosen for plumping feel: included for the cushioned, bouncy surface feel it gives a formula rather than for any claim about the skin's own collagen.
Inside the formula
Inside the formula
- 4Soluble Collagen
- 9Niacinamide
- 22Adenosine
- 46Collagen
Where each key active sits on the declared ingredient list, by entry number. Position is proportion: the further forward, the larger its share.
Medicube Collagen Glow Bubble Serum
What does the Collagen Glow Bubble Serum actually contain?
Its ingredient list is led by Soluble Collagen, 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 Collagen Glow Bubble Serum?
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 Collagen Glow Bubble Serum the same formula sold in Korea, or a US version?
This Collagen Glow Bubble Serum 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 Collagen Glow Bubble Serum 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 Collagen Glow Bubble Serum suited for?
It suits most skin types looking for treatment step right after toner rather than a single acute problem. It comes in a 100ml 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: denatured or SD alcohol, essential oils, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (61): Water(Aqua), Glycerin, Propanediol, Soluble Collagen, Glycereth-26, Cetyl Ethylhexanoate, Caprylic/Capric Triglyceride, Polyglyceryl-10 Laurate, Niacinamide, 1,2-Hexanediol, Polyglycerin-3, Pentaerythrityl Tetraisostearate, Ammonium Acryloyldimethyltaurate/VP Copolymer, Sodium Lauroyl Glutamate, Fragrance, Gardenia Florida Fruit Extract, Butylene Glycol, Dextrin, Xanthan Gum, Hydroxyethyl Urea, Ethylhexylglycerin, Adenosine, Allantoin, Collagen Extract, Macadamia Ternifolia Seed Oil, Atelocollagen, Desamido Collagen, Hydrogenated Lecithin, Sodium Hyaluronate, Hydrolyzed Elastin, Hydrolyzed Collagen, Caprylyl Glycol, Hyaluronic Acid, Cholesterol, Sodium Hyaluronate Crosspolymer, Hydrolyzed Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Sorbitan Laurate, Silica, Retinal, Glutathione, Brassica Campestris (Rapeseed) Sterols, Thioctic Acid, Ceteth-5, Ceteth-3, Collagen, Collagen Amino Acids, Potassium Cetyl Phosphate, Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate, Hydroxyethylcellulose, Acetyl Dipeptide-1 Cetyl Ester, Sodium Acetylated Hyaluronate, Procollagen, Hydroxypropyltrimonium Hyaluronate, Acetyl Hexapeptide-1, Palmitoyl Tripeptide-5, Disodium EDTA, Acetyl Octapeptide-3, Soluble Collagen Crosspolymer, Rosin Hydrolyzed Collagen, Potassium Myristoyl Hydrolyzed Collagen
57 of 61 explained
- Water(Aqua) 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.
- 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.
- 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.
- Soluble Collagen protein
- Soluble Collagen is collagen kept in its intact triple-helix form and dissolved rather than cut up. It sits on the surface as a water-holding film.
- 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.
- Cetyl Ethylhexanoate emollient
- Cetyl Ethylhexanoate is a synthetic ester used as a dry-feeling emollient. It spreads easily, leaves a silky rather than oily finish, and helps disperse pigments and UV filters evenly.
- 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.
- 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.
- 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.
- Polyglycerin-3 humectant
- Polyglycerin-3 is a short chain of glycerin units used as a gentler, less sticky humectant. It also helps oils and water stay blended.
- Pentaerythrityl Tetraisostearate emollient
- A thick, cushioned ester that gives lip and balm formulas their gloss and their cling. It is heavy enough to stay where it is put.
45 more explained
- 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.
- Sodium Lauroyl Glutamate surfactant
- Sodium Lauroyl Glutamate is an amino-acid-derived cleansing surfactant. It lifts oil and makeup at a pH close to skin's own, which is why it replaced sulfates in gentle cleansers.
- Fragrance fragrance
- Fragrance, or Parfum, is a single declaration standing for a whole scent blend, which can be dozens of materials. Regulators allow it as a trade secret, so a list showing only this word does not say what the scent is made of. It is the most common trigger named by people with reactive skin.
- Gardenia Florida Fruit Extract plant extract
- Gardenia Fruit Extract is the traditional East Asian yellow dye plant. In skincare it is used as an antioxidant extract, and it can tint a formula.
- 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.
- Dextrin thickener
- Dextrin is a starch fragment used to thicken and to give a formula a light, powdery finish. It is also a common carrier for powdered extracts.
- 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.
- Hydroxyethyl Urea humectant
- Hydroxyethyl Urea is a humectant that holds a lot of water for its size and stays comfortable at high levels. It is used where a formula needs to feel deeply hydrating without oil.
- 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.
- 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.
- 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.
- Collagen Extract protein
- Collagen Extract is a collagen-bearing extract, usually from fish skin or scales. In a formula it works as a humectant and a smoothing film rather than as a source of new collagen.
- Macadamia Ternifolia Seed Oil emollient
- Macadamia Seed Oil is unusually high in palmitoleic acid, a fatty acid that human sebum also contains, which is why it absorbs faster than most nut oils. It is a cushioning emollient for dry skin.
- Atelocollagen protein
- Atelocollagen is collagen with the ends of the molecule removed, the parts most likely to provoke a reaction. It is used as a conditioning, water-holding protein.
- Desamido Collagen protein
- Desamido Collagen is collagen chemically altered so it dissolves more readily in water. Like every collagen on a label it is far too large to enter skin, and it works as a humectant and a smoothing film.
- 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.
- 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.
- Hydrolyzed Elastin protein
- Hydrolyzed Elastin is fragments of elastin, the protein that gives skin its snap back. Like collagen it cannot rebuild the real thing from the outside; it holds water and leaves a smooth film.
- Hydrolyzed Collagen protein
- Hydrolyzed Collagen is collagen broken into fragments small enough to dissolve in water. It cannot become collagen in skin; what it does is hold water at the surface and leave a smooth, conditioned film.
- 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.
- 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.
- 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.
- Sodium Hyaluronate Crosspolymer humectant
- Sodium Hyaluronate Crosspolymer is hyaluronic acid linked into a mesh. It holds water in a soft gel on the surface rather than sinking in, and it releases that water slowly through the day.
- Hydrolyzed Sodium Hyaluronate 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.
- Sorbitan Laurate emulsifier
- Sorbitan Laurate is a light emulsifier and solubiliser, used to keep small amounts of oil or fragrance dissolved in a watery formula.
- 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.
- Retinal active
- Retinal is retinaldehyde, a vitamin A derivative one chemical step closer to retinoic acid than retinol is. It is yellow-orange and unstable in light, so products carrying it are usually opaque.
- 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.
- Brassica Campestris (Rapeseed) Sterols emollient
- Phytosterols are plant sterols, structurally close to the cholesterol in skin's own lipid layer. They soften skin and help the oil phase of a formula hold together.
- Thioctic Acid antioxidant
- Thioctic Acid is alpha lipoic acid, an antioxidant that dissolves in both water and oil, which is unusual. It is yellow and carries a faint sulfur smell.
- Ceteth-5 emulsifier
- Ceteth-5 is a fatty-alcohol-derived emulsifier, used with its oilier and more water-loving relatives to build a stable cream.
- Ceteth-3 emulsifier
- Ceteth-3 is a fatty-alcohol-derived emulsifier. It is oil loving rather than water loving, so it is paired with a water-loving partner.
- Collagen protein
- Collagen is the structural protein that makes up most of the dermis. Applied on top it is far too large to enter skin, so in a formula it works as a humectant and a smoothing film former.
- Collagen Amino Acids amino acid
- Collagen Amino Acids are collagen broken all the way down to its individual amino acids. At that size they act as humectants, the same job skin's own amino acids do.
- Potassium Cetyl Phosphate emulsifier
- Potassium Cetyl Phosphate is an emulsifier prized for keeping powdered ingredients evenly suspended, which is why tinted and mineral-powder textures use it.
- Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate antioxidant
- This is a stabiliser that keeps the oils and fragrance in a formula from oxidising. Its job is the shelf life of the product rather than any effect on skin.
- Hydroxyethylcellulose thickener
- Hydroxyethylcellulose is a cellulose thickener that builds a clear, smooth gel and holds the rest of the formula in suspension.
- Acetyl Dipeptide-1 Cetyl Ester peptide
- Acetyl Dipeptide-1 Cetyl Ester is a two-amino-acid peptide with a fatty cetyl tail attached, which lets it sit in the oil phase of a formula rather than only the water phase.
- 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.
- Procollagen protein
- Procollagen is the precursor molecule cells build before it is trimmed into collagen. Applied on top it behaves like the other collagens on a label: a large protein that holds water at the surface.
- Hydroxypropyltrimonium Hyaluronate humectant
- Hydroxypropyltrimonium Hyaluronate carries a positive charge, and skin carries a slight negative one, so it is attracted to the surface and stays through rinsing. It is the hyaluronic used where a formula gets washed off.
- Acetyl Hexapeptide-1 peptide
- Acetyl Hexapeptide-1 is a six-amino-acid peptide used for the look of even tone. It is one of the few peptides aimed at pigment rather than at lines.
- 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.
- 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.
- Acetyl Octapeptide-3 peptide
- Acetyl Octapeptide-3 is an eight-amino-acid peptide used for the look of expression lines. It is usually paired with acetyl hexapeptide-8 rather than used alone.
- Market
- Korean market, the version sold in Korea
- Made in
- Republic of Korea
- Volume
- 100ml
- Category
- Serum & Ampoule
- Actives
- Adenosine, Allantoin, Collagen, Glutathione, Hyaluronic Acid, Niacinamide, Peptides, Sodium Hyaluronate, 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.
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 it works
Medicube Collagen Glow Bubble Serum is a serum built for the treatment step right after toner. Its ingredient list leads with Soluble Collagen, Collagen, and Niacinamide, so the formula's stated purpose lines up with what actually sits near the top of that list rather than with a single marketing ingredient buried further down. Soluble Collagen does the most work here as a plumping feel, and the remaining actives round out the texture and finish rather than compete for attention. Placed as the treatment step right after toner, it is meant to be used AM/PM rather than swapped freely between steps. Because this is the Korean-market version of the Collagen Glow Bubble Serum line rather than a US-reformulated variant, the texture and finish match what Medicube sells through Korean retail.
How to use
- Use the Collagen Glow Bubble Serum after toner and before moisturizer, in the evening.
- Three or four drops covers the whole face. Press it in with flat palms instead of rubbing it around.
- Toner first so the surface is damp, then this, then about a minute before your moisturizer goes over the top. Retinal is the entry that puts this step in the evening rather than the morning.
- Start at two or three evenings a week and build up from there, because retinal is on this list. Do not use it in the same routine as another retinoid or a resurfacing acid.
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.
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Medicube Collagen Glow Bubble Serum
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
Medicube, Korean-market original
Medicube's Korean-market serum led by Soluble Collagen, 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 the key actives in this formula, quoted from the medical sources linked beside each.
Topical collagen is a very large molecule that's too big to absorb into the skin.
Michelle Henry, MDDermatologist, Cosmopolitan Allantoin can tone down the dryness of the individual cells. It increases the water content of the skin, which means it helps to hydrate and moisturize.
Wilma Bergfeld, MDDermatologist, Cleveland Clinic
1 more professional perspective
Niacinamide helps reduce the appearance of pores in a few ways. By strengthening the skin barrier and improving elasticity, pores appear less noticeable and more even.
Ashlyn YankeAesthetician, Cleveland Clinic
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