Deep Vita C Glutathione Brightening Mask 27 X 5ea

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 (43): Water, Methylpropanediol, Glycerin, Niacinamide, Propanediol, 1,2-Hexanediol, Glycereth-26, Polyglycerin-3, Butylene Glycol, Carbomer, Arginine, Sodium Ascorbyl Phosphate, Allantoin, Polyglyceryl-10 Laurate, Hydrogenated Lecithin, Ethylhexylglycerin, Xanthan Gum, Glutathione, Dipropylene Glycol, Disodium EDTA, Coptis Japonica Root Extract, Fragrance, Methyl Diisopropyl Propionamide, Panthenol, Sodium Hyaluronate, Sodium Polyacrylate, Glyceryl Acrylate/Acrylic Acid Copolymer, PVM/MA Copolymer, Ceramide NP, Hippophae Rhamnoides Water, Ascorbic Acid, 3-O-Ethyl Ascorbic Acid, Acetyl Glucosamine, Tocopherol, Lecithin, Polysorbate 20, Biotin, Cyanocobalamin, Folic Acid, Pyridoxine, Riboflavin, Thiamine HCL, Retinol

Ingredient list read from themedicube.co.kr on 13 September 2026.

43 of 43 explained

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.

Methylpropanediol humectant

Methylpropanediol is a small glycol used to hydrate and to help water-soluble actives penetrate the outer layer of skin more evenly. It leaves almost no tack, which suits watery textures.

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.

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.

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.

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.

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.

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.

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.

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 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.

Market

Korean market, the version sold in Korea

EAN (barcode)

8800256113057

Made in

Republic of Korea

Volume

5 ea

Category

Mask

Actives

Allantoin, Ceramide NP, Glutathione, Niacinamide, Panthenol, Retinol, 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.

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.