Beauty of Joseon
Pore Firming Serum: Red Bean + PDRN
Beauty of Joseon Pore Firming Serum: Red Bean + PDRN is a 30ml serum with Sodium DNA, used after toner and before moisturizer, morning and evening.
No reviews yet30ml
$96.63 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 Sodium DNA in a serumRoutines that want Sodium DNA and Niacinamide in one stepFilling the serum step with a Korean-market formula
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- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
Key benefits
- Sodium DNA, the active this serum is built around
- Niacinamide and Adenosine on the same list, actives
- Dipeptide Diaminobutyroyl Benzylamide Diacetate on the same list, a peptide
- Ceramide NP on the same list, a barrier lipid
- Beta-Glucan and Coptis Japonica Root Extract further down the same list
- Centella Asiatica Extract and Ficus Carica (Fig) Fruit Extract further down the same list
Key actives
5Niacinamideactive
Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. The panel names it fifth on this serum's list, beside Sodium DNA.
14Adenosineactive
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. It is named fourteenth on this serum's list, alongside Sodium DNA.
21Sodium DNAactive
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. It is the entry this serum is named after, and the list carries it.
24Ceramide NPbarrier 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. The panel names it twenty-fourth on this serum's list, beside Sodium DNA.
27Dipeptide Diaminobutyroyl Benzylamide Diacetatepeptide
This is a two-amino-acid peptide, sold as Syn-Ake, used for the look of expression lines. Its structure was modelled on a component of snake venom, though nothing of the venom itself is in it. It is named twenty-seventh on this serum's list, alongside Sodium DNA.
All products with Dipeptide Diaminobutyroyl Benzylamide Diacetate
Inside the formula
Inside the formula
- 5Niacinamide
- 14Adenosine
- 21Sodium DNA
- 24Ceramide NP
- 27Dipeptide Diaminobutyroyl
Where each key active sits on the declared ingredient list, by entry number. Position is proportion: the further forward, the larger its share.
Beauty of Joseon Pore Firming Serum: Red Bean + PDRN
Where does this serum go in my routine?
After toner and before moisturizer, morning and evening. Anything thinner than a serum 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 Sodium DNA and not three changes at once.
What else is on the list besides Sodium DNA?
Niacinamide, Adenosine and Dipeptide Diaminobutyroyl Benzylamide Diacetate. The order they are printed in on this serum's panel is the order on the box, so you can see where Sodium DNA sits relative to them. Further down the same panel: Ceramide NP, Beta-Glucan and Coptis Japonica Root Extract.
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 (27): Water, Butylene Glycol, Methyl Gluceth-20, 1,2-Hexanediol, Niacinamide, Glycerin, Polysorbate 20, Glycereth-26, Squalane, Carbomer, Tromethamine, Ethylhexylglycerin, Xanthan Gum, Adenosine, Disodium EDTA, Hydrogenated Lecithin, Coptis Japonica Root Extract, Centella Asiatica Extract, Ficus Carica (Fig) Fruit Extract, Dioscorea Japonica Root Extract, Sodium DNA, Phaseolus Angularis Seed Extract, Hydrolyzed Corn Starch, Ceramide NP, Beta-Glucan, Sucrose, Dipeptide Diaminobutyroyl Benzylamide Diacetate
Ingredient list read from beautyofjoseon.com on 30 August 2026.
27 of 27 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.
- 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.
- Methyl Gluceth-20 humectant
- Methyl Gluceth-20 is a sugar-derived humectant. It holds water in the outer layer of skin and gives a smooth, cushioned slip that plain glycerin does not.
- 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.
- 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.
- Polysorbate 20 emulsifier
- Polysorbate 20 is a solubiliser: it dissolves small amounts of oil or fragrance into a watery formula so nothing separates or floats.
- 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.
- 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.
- 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.
- 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.
- 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.
15 more explained
- 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.
- 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.
- 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.
- Coptis Japonica Root Extract plant extract
- Coptis Japonica is a traditional East Asian medicinal root, bright yellow from its berberine content. In skincare its extract is used for the look of congested, oily skin.
- 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.
- Ficus Carica (Fig) Fruit Extract plant extract
- Fig Fruit Extract carries fruit sugars, mild acids and a protein-digesting enzyme. It is used as a hydrating extract with a light smoothing effect.
- Dioscorea Japonica Root Extract plant extract
- Dioscorea Japonica is Japanese wild yam, whose root is naturally slippery with mucilage. Its extract hydrates and leaves a cushioned feel.
- 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.
- Phaseolus Angularis Seed Extract plant extract
- Adzuki bean seed extract, the pat of Korean home skincare. It carries saponins and starches and is used as a conditioning, mildly cleansing extract.
- Hydrolyzed Corn Starch absorbent
- Hydrolyzed Corn Starch is starch broken into smaller fragments. It gives a silky, powdery slip and absorbs a little oil.
- 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.
- 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.
- Sucrose humectant
- Sucrose is table sugar, used here as a humectant. It draws water into the outer layer of skin and, in a scrub, doubles as the physical grain.
- Dipeptide Diaminobutyroyl Benzylamide Diacetate peptide
- This is a two-amino-acid peptide, sold as Syn-Ake, used for the look of expression lines. Its structure was modelled on a component of snake venom, though nothing of the venom itself is in it.
- Market
- Korean market, the version sold in Korea
- Made in
- Republic of Korea
- Volume
- 30ml
- Category
- Serum & Ampoule
- Actives
- Adenosine, Beta-Glucan, Centella Asiatica, Ceramide NP, Niacinamide, PDRN (Sodium DNA), 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.
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.
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 it works
The Pore Firming Serum: Red Bean + PDRN is a 30ml serum, used after toner and before moisturizer, morning and evening. The active it is built around is Sodium DNA, named twenty-first on its own ingredient list. The same list carries Niacinamide, Adenosine and Dipeptide Diaminobutyroyl Benzylamide Diacetate, so the active is not the only thing on it worth naming. How much of the Sodium DNA stays on the skin, and for how long, is decided by the serum format rather than by the list alone. Beauty of Joseon sells this Sodium DNA serum in Korea, and this is that version.
How to use
- Use the Pore Firming Serum: Red Bean + PDRN after toner and before moisturizer, morning and evening.
- Three or four drops covers the whole face. Press it in with flat palms instead of rubbing it around.
- Toner first so the surface is damp, then this, then about a minute before your moisturizer goes over the top.
- Twice a day, every day. Do not stack it with a second serum of the same kind; two hydrating serums in one routine do the work of one.
Worth knowing
- Patch test this serum on a small area and wait a day before using it more widely, especially with Sodium DNA on the list.
- Introduce this serum on its own for the first week, so anything your skin does is traceable to the Sodium DNA rather than to three changes at once.
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Beauty of Joseon Pore Firming Serum: Red Bean + PDRN
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
Beauty of Joseon, Korean-market original
The Original Korean Formula serum from Beauty of Joseon, 30ml formulated with Sodium DNA and Niacinamide, 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.
For Beauty of Joseon, verification is by sourcing chain. Your unit arrives with its Korean-market barcode and batch code intact, and we publish where we buy. The brand has retired its QR scan and is phasing out its authenticity seal, so the box itself is the record.
Source: Beauty of Joseon help centre
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 the key actives in this formula, quoted from the medical sources linked beside each.
Peptides can be anti-inflammatory, and chronic inflammation damages the tissue in your skin.
Wilma Bergfeld, MDDermatologist, Cleveland Clinic It's still a very new ingredient in the field of regenerative medicine.
Catherine ChangBeverly Hills board-certified plastic and reconstructive surgeon, Harper's Bazaar
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
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