Where does this cream go in my routine?

As the last skincare step, morning and evening, over serum. Anything thinner than a cream goes on before it, and anything richer goes on after. 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 cream or a US version?

The Korean-market one, Niacinamide and all. We match this cream 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?

Adenosine, Dipotassium Glycyrrhizate and Tocopherol. The order they are printed in on this cream's panel is the order on the box, so you can see where Niacinamide sits relative to them. Further down the same panel: Ceramide NP, Cholesterol and Tannic Acid.

Dr. nineteen

Porexsome CollaBooster Poreshot Cream

Name: Dr. nineteen Porexsome CollaBooster Poreshot Cream
Brand: Dr. nineteen
SKU: Shopify-8800286940012
Price: 19.99 USD
Availability: InStock

Dr. Nineteen's Porexsome CollaBooster Poreshot Cream is a concentrated, fast-absorbing booster cream built around Niacinamide, Adenosine, Ceramide NP and Dipotassium Glycyrrhizate, layered as a targeted step under a regular moisturizer for dullness and an uneven-looking tone.

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$19.99

50 ml

$39.98 per 100 ml

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 creamRoutines that want Niacinamide and Adenosine in one stepFilling the cream step with a Korean-market formulaAnyone who wants the Niacinamide cream sold on Korean shelves

In stock. Arrives in 3 to 7 business days

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How it works

The Porexsome CollaBooster Poreshot Cream is a 50ml cream, used as the last skincare step, morning and evening, over serum. The active it is built around is Niacinamide, named fourth on its own ingredient list. The same list carries Adenosine, Dipotassium Glycyrrhizate and Tocopherol, 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 cream format rather than by the list alone. This is the Original Korean Formula, the cream Dr. nineteen sells in Korea, Niacinamide and all.

Key benefits

Niacinamide, the active this cream is built around
Adenosine and Dipotassium Glycyrrhizate on the same list, actives
Tocopherol on the same list, an antioxidant
Ceramide NP on the same list, a barrier lipid
Cholesterol and Tannic Acid further down the same list
Aloe Barbadensis Extract and Dicaprylyl Carbonate further down the same list

Inside the formula

Ingredients declared

No fragrance

on the list

1 of 6

47 of 48 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.
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.
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.
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.
Dicaprylyl Carbonate emollient: Dicaprylyl Carbonate is a light, fast-spreading emollient with a notably dry finish. It is chosen where a formula has to spread thin without leaving a heavy film.
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.
Neopentyl Glycol Dicaprate emollient: A light branched ester with a dry, powdery finish. It is used to thin heavier oils without adding shine.
Phenyl Trimethicone silicone: Phenyl Trimethicone is a silicone with a higher refractive index than most, so it adds visible gloss as well as slip. It is common in glow and lip textures.
Phytosterols emollient: Phytosterols are plant sterols, structurally close to the cholesterol in skin's own lipid layer. They soften skin and help the oil phase of a formula hold together.
Arachidyl Alcohol fatty alcohol: Arachidyl Alcohol is a long-chain fatty alcohol used as a thickener and emollient, usually alongside behenyl alcohol.
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.

35 more explained

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.
Tapioca Starch absorbent: Cassava starch. It absorbs oil and leaves a dry, powdery finish, which is how a cream is made to feel matte.
Stearic Acid fatty acid: Stearic Acid is a saturated fatty acid from plant fats, and one of the three lipid classes skin's own barrier is built from. In a formula it thickens, stabilises the emulsion and can be turned into a soap-style cleanser by adding a base.
Vinyl Dimethicone silicone: Vinyl Dimethicone is a silicone used as a building block of the crosspolymer gels that give a formula its soft, blurring feel.
Behenyl Alcohol fatty alcohol: Behenyl Alcohol is a long-chain fatty alcohol used to thicken and stabilise a cream. It gives a richer, more velvety body than cetyl alcohol.
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.
Polylactic Acid film former: A polymer built from lactic acid, used as fine spheres or as a film. It scatters light softly and blurs the look of surface texture.
Ammonium Acryloyldimethyltaurate/VP Copolymer thickener: This is a synthetic thickener that gels quickly and holds an emulsion stable across a wide pH range. It gives a light, non-tacky body.
Arachidyl Glucoside emulsifier: Arachidyl Glucoside is a sugar-derived co-emulsifier, usually supplied with arachidyl and behenyl alcohols as a plant-based cream base.
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.
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.
Dimethiconol silicone: Dimethiconol is a high-molecular-weight silicone that leaves a longer-lasting smooth film than dimethicone. It is used for lasting slip and shine.
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer thickener: This is the thickener behind most gel-cream textures. It builds a soft, bouncy gel that collapses to a light fluid as it is rubbed in.
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.
Sodium Phytate chelator: Sodium Phytate is a rice-derived chelator used in place of EDTA. It ties up trace metals so the formula stays stable and its colour and scent hold.
Xanthan Gum thickener: Xanthan Gum is a polysaccharide made by fermenting sugar. It thickens a watery formula into a gel and holds the whole thing in suspension so nothing separates. Too much of it and a serum turns stringy, which is why it appears in fractions of a percent.
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.
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.
Sodium Hyaluronate Crosspolymer humectant: Sodium Hyaluronate Crosspolymer is hyaluronic acid linked into a mesh. It holds water in a soft gel on the surface rather than sinking in, and it releases that water slowly through the day.
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.
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.
Sorbitan Isostearate emulsifier: Sorbitan Isostearate is a mild emulsifier that holds water into oil, the direction a cleansing balm or an oil-based cream needs.
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.
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.
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.
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.
Hyaluronic Acid humectant: Hyaluronic Acid is a sugar chain the body already makes, and one gram of it can hold several litres of water. In a formula it is a humectant that pulls water to the surface of skin and holds it in a film, which is what makes skin look plumper while it is there.
Hydroxypropyltrimonium Hyaluronate humectant: Hydroxypropyltrimonium Hyaluronate carries a positive charge, and skin carries a slight negative one, so it is attracted to the surface and stays through rinsing. It is the hyaluronic used where a formula gets washed off.
Potassium Hyaluronate humectant: Potassium Hyaluronate is another salt of hyaluronic acid, used for the same reason as the sodium form: it dissolves easily and holds a large amount of water in the outer layer of skin.
Chitosan film former: Chitosan comes from the shells of crustaceans. It carries a positive charge, so it clings to skin and hair as a thin film, and it is a shellfish-derived ingredient.
Sodium Acetylated Hyaluronate humectant: Sodium Acetylated Hyaluronate is hyaluronic acid modified to be part oil-loving, so it clings to skin instead of rinsing away. Formulators call it the one that stays put.
Tannic Acid plant extract: Tannic Acid is the tannin fraction of plants such as oak and tea. It binds to proteins on the surface, which is what gives a tannin its tightening, astringent feel.
Aloe Barbadensis Extract plant extract: Aloe vera extract, declared without naming the leaf part. It carries the plant's water-holding polysaccharides and is used as a hydrating, conditioning extract.
Cellulose Gum thickener: Cellulose Gum is plant cellulose modified to dissolve in water. It thickens, holds particles in suspension and gives a smooth, slippery body.
Cellulose absorbent: Cellulose is plant fibre. In a formula it thickens, absorbs oil and, in a sheet mask, is often the fabric itself.

How to use

Use the Porexsome CollaBooster Poreshot Cream as the last skincare step, morning and evening, over serum.
Apply a moderate amount onto the skin and gently pat for better absorption.
It closes the routine at night, and in the morning it is the layer sunscreen goes over.
Twice a day. Do not skip it on an oily day; without a sealing layer the water the steps beneath it brought in leaves again.

Worth knowing

Patch test this cream on a small area and wait a day before using it more widely, especially with Niacinamide on the list.
Introduce this cream on its own for the first week, so anything your skin does is traceable to the Niacinamide rather than to three changes at once.

Complete the routine

This itemDr. nineteen Porexsome CollaBooster Poreshot Cream$19.99
Prep after cleansing, before the treatment stepDr. nineteen Porexsome V.Peptox Jelly Toner$21.17
The treatment step of this routineDr. nineteen ReDRN Exosome Ampoule$18.82

Total for 3 items$59.98

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Dr. nineteen Porexsome CollaBooster Poreshot Cream

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Dr. nineteen, Korean-market original

Shop Porexsome CollaBooster Poreshot Cream (50ml), the authentic Korean-market booster from Dr. nineteen formulated with Niacinamide, sourced for the Korean market rather than a US-shelf reformulation.

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 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