Retinosine Deep Intense Serum 20ml

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 (47): Water, Glycerin, Butylene Glycol, Propanediol, Niacinamide, 1,2-Hexanediol, Betaine, Methylpropanediol, Tocopherol, Diethoxyethyl Succinate, Glycereth-26, Panthenol, Hydrogenated Lecithin, Caprylic/Capric Triglyceride, Squalane, Polyglyceryl-3 Distearate, Macadamia Ternifolia Seed Oil, Carbomer, Retinol, Tromethamine, Xanthan Gum, Diethylhexyl Syringylidenemalonate, Brassica Campestris (Rapeseed) Sterols, Ethylhexylglycerin, Adenosine, Cholesterol, Polyglyceryl-10 Laurate, Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate, Glyceryl Stearate Citrate, Aluminum/Magnesium Hydroxide Stearate, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Viola Odorata Leaf Extract, Ceramide NP, Sodium Phytate, Vanilla Planifolia Fruit Extract, Crataegus Monogyna Fruit Extract, Potassium Cetyl Phosphate, Prunus Amygdalus Dulcis (Sweet Almond) Fruit Extract, Hedera Helix (Ivy) Leaf/Stem Extract, Chitosan, Beta-Glucan, Polyglyceryl-10 Stearate, Tris(Tetramethylhydroxypiperidinol) Citrate, Amyris Balsamifera Bark Oil, Hydrolyzed Collagen, Arginine/Lysine Polypeptide, Bakuchiol

Ingredient list read from inkeedecoder.com on 12 September 2026.

43 of 47 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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Market

Korean market, the version sold in Korea

Made in

Republic of Korea

Volume

20 ml

Category

Serum & Ampoule

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.

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.