Is the Skin Perfecting Protective Base Prep sold here YUNJAC's Korean-market formula?

Yes. What ships is YUNJAC's release for the Korean market: the formula and packaging sold in Korea, with the Korean-market barcode and batch code intact on the box rather than swapped for an export or US-retail label.

Does the Skin Perfecting Protective Base Prep contain fragrance?

Yes. Parfum appears on the manufacturer's own ingredient list for this formula, contributing to its scent alongside the actives above. If a fragrance-free routine matters to you, check the position of parfum on the full list before buying.

How does buying the Skin Perfecting Protective Base Prep here compare with a US retailer carrying the same name?

A US listing under the same product name can be a reformulated export version and rarely states which one it is selling. What we carry is the Korean-market YUNJAC release, identified by its intact Korean barcode and batch code on the box rather than a relabeled export carton, so the unit you get matches what is sold on shelf in Korea.

YUNJAC

Skin Perfecting Protective Base Prep 40ml

Name: YUNJAC Skin Perfecting Protective Base Prep 40ml
Brand: YUNJAC
SKU: 5106291287
Price: 70.0 USD
Availability: InStock

A makeup base-prep from YUNJAC built on Niacinamide and Ceramide 3, applied after skincare and before foundation to even the surface and give makeup a longer hold through the day.

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$70.00

40 ml

Ships from California or direct from Korea
Korean barcode and batch code intact

Suited to: NormalDryCombination

Helps with: The final moisture step of a routineDaily use as the last layer of a routineA richer step for evenings or colder weather

In stock. Ships from California or direct from Korea

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How it works

Skin Perfecting Protective Base Prep is a cream built on Niacinamide, the brightening and barrier-support active, named 4 of 47 entries on YUNJAC's own manufacturer INCI for this formula. Ceramide 3 runs alongside it, a barrier lipid from the ceramide family, and the rest of the list rounds out a YUNJAC formula built for this format rather than a stripped-down version of it. It takes the last step of a routine, after essence or serum, and the cream format is the reason it behaves the way it does once it is on skin. A cream in this format is built with a richer base than a lotion or serum, which is the format choice for sealing in the steps underneath.

Key benefits

Built on Niacinamide, the brightening and barrier-support active
Ceramide 3 runs alongside it, a barrier lipid from the ceramide family
Parfum appears on the ingredient list, part of this formula's scent profile
40ml cream sold in YUNJAC's Korean-market packaging, not a US-reformulated version
Takes the last step of a routine, after essence or serum
47 ingredients on the manufacturer's own list, in the order YUNJAC lists them

Key actives

4Niacinamide

Niacinamide is The brightening and barrier-support active. It appears at position 4 of 47 on YUNJAC's own manufacturer ingredient list for this formula, which is real evidence of what the formula is built around rather than a marketing label placed over it.

16Ceramide 3

Ceramide 3 is A barrier lipid from the ceramide family. It appears at position 17 of 47 on YUNJAC's own manufacturer ingredient list for this formula, which is real evidence of what the formula is built around rather than a marketing label placed over it.

20Adenosine

Adenosine is The wrinkle-care active recognized in Korea's own cosmetic functional-ingredient system. It appears at position 21 of 47 on YUNJAC's own manufacturer ingredient list for this formula, which is real evidence of what the formula is built around rather than a marketing label placed over it.

22Squalane

Squalane is A lightweight emollient that mimics skin's own sebum. It appears at position 23 of 47 on YUNJAC's own manufacturer ingredient list for this formula, which is real evidence of what the formula is built around rather than a marketing label placed over it.

How to use

Use the Skin Perfecting Protective Base Prep after your sunscreen has settled, as the first makeup step of the morning.
Press a small amount on with the puff or a damp sponge, working outward from the centre of the face, and build a second thin layer only where you want more cover.
Skincare and sunscreen go on first and want a minute to settle. Powder or blush goes over the top once this has set.
On the days you want the finish. Do not use it in place of your sunscreen step; it goes over sunscreen, never instead of it.

1 of 3

39 of 46 explained

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.
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.
Alcohol Denat solvent: Alcohol Denat. is ethanol with a bitter additive that makes it undrinkable, which is a tax rule rather than a formulation choice. It behaves like alcohol: a fast-evaporating solvent that gives a weightless finish and can feel drying at higher levels.
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.
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.
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.
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.
Polyglyceryl-10 Stearate emulsifier: Polyglyceryl-10 Stearate is a mild sugar-derived emulsifier that holds oil into water and thickens slightly.
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.
Polyurethane-15 film former: Polyurethane-15 is a flexible film-forming polymer. It holds a formula in place as a stretchy film, which is why it appears in long-wear and peel-off products.
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.
Cetearyl Alcohol fatty alcohol: Cetearyl Alcohol is a waxy solid, not the drying kind of alcohol. It is a blend of cetyl and stearyl alcohols used to thicken a cream and keep oil and water from separating, and it softens skin as it does so.

27 more explained

Tromethamine pH adjuster: Tromethamine neutralises acidic thickeners such as carbomer so they gel, and holds a formula near skin-friendly pH. It is used at a fraction of a percent.
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.
Hydroxyethylcellulose thickener: Hydroxyethylcellulose is a cellulose thickener that builds a clear, smooth gel and holds the rest of the formula in suspension.
Ceramide 3 barrier lipid: Ceramide NP is the most used cosmetic ceramide, the same class of lipid that makes up roughly half the mortar between cells in the outer layer of skin. Added to a cream it slots into that structure, which is why ceramide formulas feel less leaky rather than merely greasy.
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.
Triethylhexanoin emollient: Triethylhexanoin is a light ester emollient that softens skin and disperses pigment. It absorbs cleanly and is often used to thin a heavy oil phase.
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.
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.
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.
Saccharomyces/Potato Extract Ferment Filtrate ferment: Potato extract fermented with yeast and strained. It supplies sugars and amino acids and is used as a conditioning ferment.
Saccharomyces/Coix Lacryma-Jobi Ma-Yuen Seed Ferment Filtrate ferment: Job's tears, the yulmu of Korean grain tea, fermented with yeast and strained. It supplies sugars and amino acids and is used as a conditioning ferment.
Phospholipids barrier lipid: Phospholipids are the lipid class lecithin belongs to, with a water friendly head and two fatty tails. That shape is what lets them form liposomes and hold an emulsion together.
Lactobacillus/Soybean Ferment Extract ferment: This is soybean fermented by lactobacillus. The fermentation breaks soy proteins into smaller pieces, which is what makes the extract easier for a formula to carry.
Lactobacillus/Rice Ferment ferment: Rice fermented with lactobacillus, the same bacteria behind kimchi and makgeolli. Fermentation breaks the rice starch into smaller sugars and amino acids that hold water.
Hydrogenated Polydecene emollient: Hydrogenated Polydecene is a synthetic hydrocarbon emollient used in place of mineral oil. It is stable, has no scent, and gives a cushioned slip without oxidising.
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.
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.
Phytosphingosine barrier lipid: Phytosphingosine is the backbone every ceramide is built on, and skin uses it in its own lipid layer. In a formula it works with ceramides and cholesterol and also keeps the product stable against microbes.
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.
Theobroma Cacao (Cocoa) Extract plant extract: Cocoa Extract carries polyphenols and a little caffeine. It is used as an antioxidant plant extract and gives a faint warm tint.
Tin Oxide colorant: A white mineral used in small amounts alongside pearl pigments, where it helps them disperse and brightens the effect.
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.
Parfum 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.
Limonene fragrance component: Limonene is the citrus-peel aromatic. It appears here because EU labelling requires 26 fragrance components to be named individually rather than hidden inside "fragrance", and it is one of them.
Citronellol fragrance component: Citronellol is a rose-geranium aromatic and one of the 26 fragrance components EU labelling names individually.
Geraniol fragrance component: Geraniol is a rose-scented aromatic found in geranium and citronella oils. It is one of the 26 declarable fragrance components.
Linalool fragrance component: Linalool is a floral aromatic found in lavender, bergamot and coriander. It is one of the 26 fragrance components EU labelling requires to be declared by name.

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Inside the formula

Ingredients declared

Last

Fragrance on the list

4Niacinamide16Ceramide 320Adenosine

4Niacinamide
16Ceramide 3
20Adenosine

Where each key active sits on the declared ingredient list, by entry number. Position is proportion: the further forward, the larger its share.

Worth knowing

Patch test on the inner arm first, as with any new step added to a routine.
Discontinue if irritation develops and check the ingredient list against any known sensitivity.

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YUNJAC Skin Perfecting Protective Base Prep 40ml

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YUNJAC, Korean-market original

Cream built on Niacinamide, 40ml.

Verify your unit when it arrives

Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.

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 skin-care professionals say about the key actives in this formula, quoted from the medical sources linked beside each.

Ceramides are part fatty acid and part amino acid and are able to be the grout that keeps the building blocks of the skin together and functioning as a barrier between the inside and outside world.
Amy Kassouf, MDDermatologist, Cleveland Clinic
Squalane comes from a lipid that occurs naturally in your skin.
Alok Vij, 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