Sungboon Editor
Deep Collagen CICA Teatree Soothing Mask$11.76345 Cream Mask (4 Sheets)
A sheet mask from Dr. Althea's Korean-market lineup. Niacinamide sits at position 8 of 38 on the brand's own ingredient list, a brightening and barrier-support active; Allantoin follows at position 16, a calming, comedolytic-adjacent skin-conditioning agent. 4ea to a unit.
No reviews yet$13.99
4ea
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Dry skinCompromised barrierDehydrated skinSensitive skin
- Helps with
- Shoppers looking for Niacinamide in a sheet maskRoutines that want Niacinamide and Allantoin in one stepFilling the sheet mask step with a Korean-market formulaAnyone who wants the Niacinamide sheet mask sold on Korean shelves
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Sungboon Editor Deep Collagen CICA Teatree Soothing MaskSungboon Editor
$11.76
$18.83
$23.52
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
The 345 Cream Mask is a 4ea sheet mask, used after toner, in place of your serum step, in the evening. The active it is built around is Niacinamide, named seventh on its own ingredient list. The same list carries Allantoin, Dipotassium Glycyrrhizate and Madecassoside, so the active is not the only thing on it worth naming. How much of the Niacinamide stays on the skin, and for how long, is decided by the sheet mask format rather than by the list alone. This is the Original Korean Formula, the sheet mask Dr.Althea sells in Korea, Niacinamide and all.
Key benefits
- Niacinamide, the active this sheet mask is built around
- Allantoin, Dipotassium Glycyrrhizate, Madecassoside and Sodium DNA on the same list, actives
- Pantothenic Acid and Resveratrol further down the same list
- Ceramide NP and Cholesterol further down the same list
- Niacinamide named seventh on the manufacturer list printed on this page
- Original Korean Formula, the sheet mask sold on Korean shelves
Inside the formula
Inside the formula
37
Ingredients declared
No fragrance
on the list
Dr. Althea 345 Cream Mask (4 Sheets)
Where does this sheet mask go in my routine?
After toner, in place of your serum step, in the evening. Toner goes on before it, and the rest of the routine goes on after you take the sheet mask off. If you are adding it to a routine you already like, give it a week on its own first, so what you see is the Niacinamide and not three changes at once.
Is this the Korean-market sheet mask or a US version?
The Korean-market one, Niacinamide and all. We match this sheet mask to its Korean barcode before it reaches the shelf, which is the check that tells you which market release you are holding.
What else is on the list besides Niacinamide?
Allantoin, Dipotassium Glycyrrhizate and Madecassoside. The order they are printed in on this sheet mask's panel is the order on the box, so you can see where Niacinamide sits relative to them. Further down the same panel: Sodium DNA, Pantothenic Acid and Resveratrol.
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 (37): Aqua (Water), Tea Tree Leaf Water, Methylpropanediol, 1,2-Hexanediol, Butylene Glycol, Glycerin, Niacinamide, Octyldodeceth-16, Triethylhexanoin, Caprylic/Capric Triglyceride, Pentylene Glycol, Carbomer, Hydroxyethylcellulose, Tromethamine, Allantoin, Trehalose, Caprylyl Glycol, Ethylhexylglycerin, Dipotassium Glycyrrhizate, Disodium EDTA, Panthenol, Soybean Seed Extract, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Pantothenic Acid, Centella Asiatica Leaf Water, Cyclodextrin, Centella Asiatica Extract, Hydrogenated Lecithin, Madecassoside, Ceramide NP, Cholesterol, Camellia Sinensis Leaf Water, Resveratrol, Beta-Glucan, Sodium DNA, Nelumbo Nucifera Leaf Extract
Ingredient list read from jolse.com on 9 September 2026.
36 of 37 explained
- Aqua (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.
- Tea Tree Leaf Water plant extract
- Tea Tree Leaf Water is the distillate, used in place of plain water as a base. It carries a trace of the plant's aroma and none of the essential oil's strength.
- 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.
- 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.
- 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.
- 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.
- Octyldodeceth-16 emulsifier
- An ethoxylated branched fatty alcohol. It emulsifies and also gives a formula a soft, cushioned slip.
- 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.
- 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.
- Pentylene Glycol humectant
- Pentylene Glycol hydrates and, like the other longer-chain glycols, makes a formula less hospitable to microbes so the preservative system can be lighter. It also improves how evenly a product spreads.
- 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.
24 more explained
- Hydroxyethylcellulose thickener
- Hydroxyethylcellulose is a cellulose thickener that builds a clear, smooth gel and holds the rest of the formula in suspension.
- 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.
- 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.
- Trehalose humectant
- Trehalose is a sugar that some desert plants use to survive drying out. In skincare it is a humectant that holds water in the outer layer and helps a formula feel comfortable rather than tight.
- 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.
- 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.
- Dipotassium Glycyrrhizate active
- Dipotassium Glycyrrhizate is a water-soluble salt derived from licorice root. It is the licorice fraction Korean formulas use for the look of redness, and it is far more stable in water than the whole extract.
- 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.
- 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.
- 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 Hyaluronic Acid 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.
- Pantothenic Acid vitamin
- Pantothenic Acid is vitamin B5, the form skin converts panthenol into. It is used as a conditioning humectant that leaves skin feeling soft rather than tight.
- Centella Asiatica Leaf Water plant extract
- Centella Asiatica Leaf Water is the distilled water of the centella leaf, used in place of plain water as a formula base. It is far more dilute than the extract, so it sets the base rather than supplying the actives.
- Cyclodextrin solvent
- A ring-shaped sugar with a hollow centre. Formulas use it to hold an oil, a fragrance or an unstable active inside the ring, which keeps it stable and slows its release.
- Centella Asiatica Extract plant extract
- Centella Asiatica is the plant behind the whole cica category, sold as gotu kola or Madagascar centella. Its extract is the anchor of Korean formulas built for easily reddened skin, and its work is done by four triterpenes: asiaticoside, madecassoside, asiatic acid and madecassic acid.
- 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.
- Madecassoside active
- Madecassoside is the centella triterpene most associated with the look of redness, and the one brands lead with in cica products. It is water soluble and stable, so it appears in essences as readily as in creams.
- Ceramide NP 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.
- 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.
- Camellia Sinensis Leaf Water plant extract
- Camellia Sinensis Leaf Water is green tea distillate used in place of plain water as a base. It is far more dilute than the extract, so it sets the base rather than supplying the antioxidants.
- Resveratrol antioxidant
- Resveratrol is an antioxidant from grape skin and Japanese knotweed. It is used for the look of dullness and is often paired with ferulic acid, which keeps it stable.
- Beta-Glucan polysaccharide
- Beta-Glucan is a polysaccharide from oats or yeast. It holds a large amount of water, forms a soothing film, and is one of the ingredients formulators reach for in products aimed at reactive skin.
- Sodium DNA active
- Sodium DNA is the salt of DNA, in Korean skincare almost always salmon derived, and it is the ingredient behind the PDRN category. It is used as a humectant and for the look of tired skin; the fragments themselves are what the name PDRN refers to.
- Nelumbo Nucifera Leaf Extract plant extract
- Nelumbo Nucifera is the sacred lotus. Its leaf extract carries flavonoids and is used as a conditioning antioxidant extract.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809447256290
- Made in
- Republic of Korea
- Volume
- 4ea
- Category
- Mask / Sheet mask
- Actives
- Allantoin, Beta-Glucan, Centella Asiatica, Ceramide NP, Green Tea, Hyaluronic Acid, Licorice Root, Madecassoside, Niacinamide, Panthenol, PDRN (Sodium DNA), Sodium Hyaluronate, Tea Tree, Trehalose
- Ships from
- California or Korea
LightTextureRich
MatteFinishDewy
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. 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.
How to use
- After cleansing and toning, two to three times a week rather than daily.
- Unfold the sheet fully and press it against the face, smoothing from the center outward to remove air pockets.
- Leave on for fifteen to twenty minutes, the standard window for a cream-essence sheet to release fully.
- Remove and pat the remaining essence into the skin rather than rinsing; the leftover essence is worth pressing in rather than washing away.
Worth knowing
- Patch test this sheet mask on a small area and wait a day before using it more widely, especially with Niacinamide on the list.
- Introduce this sheet mask on its own for the first week, so anything your skin does is traceable to the Niacinamide rather than to three changes at once.
Reviews
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Dr. Althea 345 Cream Mask (4 Sheets)
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
We’re on gram!
Creators trying on authentic Korean skincare routines and products from us.
Rating a shelf of Dr. Althea products one by one.
Jasmine Loo · YouTube
Two hydrating serums side by side, IUNIK and Dr. Althea.
Kristin · YouTube
A walk through the Dr. Althea serum lineup and who each one suits.
auraofmahmuda · YouTube
A blunt first take on the Dr. Althea range.
Lexi Chang · YouTube
A first look at the viral 345 Relief Cream before buying.
Shelley Nayak · YouTube
A first try of the Dr. Althea serum on camera.
Hannah Ziad · YouTube
Dr.Althea, Korean-market original
The Original Korean Formula sheet mask from Dr.Althea, 4ea formulated with Niacinamide and Allantoin, shipped from California or direct from 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.
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 skin care, quoted from the medical sources linked beside each.
Your skin barrier is basically your outer layer of the skin.
Melissa Piliang, MDDermatologist, Cleveland Clinic Pretty much every step of a Korean skin care routine is going to have some component of hydration.
Alok Vij, MDDermatologist, Cleveland Clinic
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