Collagen Firming Volume Serum with Retinol 40ml

Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.

Full INCI (47): Water, Squalane, Glycerin, Butylene Glycol, 1,2-Hexanediol, Niacinamide, Dipentaerythrityl Hexa C5-9 Acid Esters, Hydrolyzed Extensin, Macadamia Integrifolia Seed Oil, Hydrogenated Lecithin, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Caprylic/Capric Triglyceride, Sodium Polyacryloyldimethyl Taurate, Tromethamine, Xanthan Gum, Sodium Dilauramidoglutamide Lysine, Allantoin, Ethylhexylglycerin, Adenosine, Methylpropanediol, Polyglyceryl-10 Oleate, Sodium Phytate, Melia Azadirachta Flower Extract, Citronellol, Ocimum Sanctum Leaf Extract, Dextrin, Melia Azadirachta Leaf Extract, Pentylene Glycol, Sodium Hyaluronate, Theobroma Cacao (Cocoa) Extract, Pelargonium Graveolens Flower Oil, Lavandula Angustifolia (Lavender) Oil, Ceramide NP, Linalool, Curcuma Longa (Turmeric) Root Extract, Paeonia Suffruticosa Root Extract, Corallina Officinalis Extract, Geraniol, Glyceryl Stearate Citrate, Beta-Glucan, Retinol, Palmitoyl Tripeptide-5, Glucosylrutin, Tocopherol, Behenic Acid, Cholesterol, Phytosphingosine

Ingredient list read from mediheal.com on 10 September 2026.

46 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.

Squalane emollient

Squalane is the stable, saturated version of squalene, a lipid human skin already makes. It is a light emollient that absorbs quickly, does not oxidise, and is one of the few oils widely considered safe for blemish-prone skin. Most cosmetic squalane is now from sugarcane or olive rather than shark.

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.

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.

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.

Dipentaerythrityl Hexa C5-9 Acid Esters emollient

A heavy branched ester used to give lip and stick formulas gloss and cling without stickiness.

Hydrolyzed Extensin protein

Extensin is a structural glycoprotein from plant cell walls. Hydrolysed, it is cut into fragments small enough to dissolve, and it works as a water-holding film on the surface.

Macadamia Integrifolia 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.

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.

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.

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.

Market

Korean market, the version sold in Korea

EAN (barcode)

8809936744444

Made in

Republic of Korea

Volume

40 ml

Category

Serum & Ampoule

Actives

Adenosine, Allantoin, Beta-Glucan, Ceramide NP, Niacinamide, Peptides, Retinol, Sodium Hyaluronate, Squalane

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.