EGF Blue AC Calming Serum 50g
A 50g calming serum for the treatment slot of a routine, aimed at skin that breaks out and looks flushed at the same time.
No reviews yet50 g
$80.00 per 100 g
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Normal skinCombination skinDry skinOily skin
- Helps with
- Skin that breaks outA calmer looking surfaceRedness that comes and goesEveryday treatment
In stock. Arrives in 3 to 7 business days
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How it works
This is the treatment slot of a routine, the step you choose for what you want to work on rather than for comfort alone. The fluid is light enough to spread over a whole face from a couple of pumps and settles without a residue you can feel. It stays on the skin rather than being rinsed, so the layer above it decides how long it stays comfortable. Order matters more than quantity here, and a serum belongs after the watery steps and before the rich ones. Skin that breaks out and skin that flushes easily are usually treated with products that fight each other, which is the gap a serum like this is aimed at.
Key benefits
- What it is: serum, 50g, used the treatment step after toner and before a moisturiser.
- Texture: a light fluid that turns tacky and then settles.
- Aimed at: skin that breaks out, a calmer looking surface, redness that comes and goes.
- Original Korean Formula: the version sold on Korean shelves, not a US reformulation.
Inside the formula
Inside the formula
What is the KLAIRS EGF Blue AC Calming Serum 50g?
It is a 50g serum used in the treatment slot of a routine, after toner and before a moisturiser, aimed at skin that both breaks out and looks flushed. It is a leave on step, so it stays under whatever follows it. One or two pumps covers a face.
Where does the serum go in my routine?
After cleansing and toner, before emulsion, cream or oil. A serum is the treatment slot, so it wants clean damp skin under it and a moisturiser over it. If you use an exfoliating step, that goes before this rather than after.
Will it pill under makeup?
It should not, provided each layer is given a moment to settle before the next one goes on. Pilling almost always comes from stacking wet on wet rather than from any single product. Press each layer in with flat palms and wait until the surface feels tacky instead of slippery.
Can I use the 50g morning and night?
Yes, twice a day is a normal way to use a serum, though once at night is enough if the rest of your routine is already long. Consistency at one time of day beats an ambitious routine you abandon after a fortnight. Judge it after four to six weeks rather than after a few days.
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 (61): Purified water, glycerin, 1,2-hexanediol, butylene glycol, niacinamide, propanediol, acrylates/C10-30 alkyl acrylate crosspolymer, C12-14 pareth-12, tromethamine, ammonium acryloyldimethyl taurate/VP copolymer, allantoin, ethylhexylglycerin, adenosine, xanthan gum, sodium phytate, tea tree leaf oil, indica aralia leaf extract, indica aralia flower extract, malachite extract, Ivy God Fruit Extract, Eggplant Fruit Extract, Aloe Barbadensis Flower Extract, Sodium Hyaluronate, Holy Basil Leaf Extract, Hydroxycinnamic Acid, Curcuma Root Extract, Coral Extract, Rutin, Capryloyl Salicylic Acid, Guaiazulene, Gluconolactone, Seawater, Sodium PCA, Dipropylene Glycol, Panthenol, Cabbage Extract, Green Tea Extract, Centella Asiatica Extract, Hydrogenated Lecithin, Sorbitan Olivate, Cetearyl Olivate, Miltiorrhizae Radix Extract, Broccoli Extract, Glycine, Serine, Glutamic Acid, SH-Oligopeptide-1, Aspartic Acid, Leucine, Alanine, Lysine, Arginine, Tyrosine, Phenylalanine, Valine, Threonine, Proline, Isoleucine, histidine, methionine, cysteine
Ingredient list read from jolse.com on 10 September 2026.
55 of 61 explained
- Purified 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- C12-14 pareth-12 emulsifier
- C12-14 Pareth-12 is a solubiliser that keeps oils and fragrance in solution so a clear formula stays clear.
- 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.
- ammonium acryloyldimethyl taurate/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.
- 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.
- 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.
43 more explained
- 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.
- 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.
- 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.
- tea tree leaf oil fragrance component
- Tea tree oil, an essential oil rich in terpinen-4-ol. It is used for the look of congested skin, and at higher levels it is one of the essential oils most likely to bother reactive skin.
- malachite extract mineral
- Malachite is a green copper carbonate mineral. Its extract is used in a formula as a source of trace copper.
- Eggplant Fruit Extract plant extract
- Eggplant Fruit Extract carries nasunin, the antioxidant pigment in aubergine skin. It is used as an antioxidant plant extract.
- Aloe Barbadensis Flower Extract plant extract
- Aloe Flower Extract comes from the flower rather than the leaf gel. It is used as a conditioning plant extract.
- 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.
- Holy Basil Leaf Extract plant extract
- Ocimum Sanctum is holy basil, or tulsi. Its leaf extract carries plant antioxidants and is used in formulas built for the look of stressed, reactive skin.
- Hydroxycinnamic Acid antioxidant
- Hydroxycinnamic Acid is the parent compound of the plant acid family ferulic and caffeic acid belong to. It is used as a plant antioxidant.
- Curcuma Root Extract plant extract
- Turmeric root extract, carrying curcumin, which is also what colours it deep yellow. It is used as a plant antioxidant.
- Coral Extract mineral
- Coral Extract is an extract of coral skeleton, which is calcium carbonate with trace minerals. It is used as a mineral-rich conditioning ingredient.
- Rutin antioxidant
- Rutin is quercetin with a sugar attached, which makes it far more water-soluble. It is a plant antioxidant from buckwheat and citrus peel.
- Capryloyl Salicylic Acid exfoliant
- Capryloyl Salicylic Acid is salicylic acid with a fatty tail, sometimes sold as LHA. It stays nearer the surface than salicylic acid and works at a higher pH, so it exfoliates more evenly and more gently.
- Guaiazulene active
- Guaiazulene is the deep blue compound distilled from chamomile and guaiac wood, and it is what colours a blue formula naturally. It is used for the look of reactive, reddened skin.
- Gluconolactone exfoliant
- Gluconolactone is a PHA, the gentlest exfoliant class. Its molecule is too large to penetrate quickly, so it smooths the surface without the sting of an AHA, and it is a humectant at the same time.
- Seawater mineral
- Sea Water is filtered and desalinated seawater used in place of plain water. It carries magnesium, calcium and potassium, so it brings the mineral balance of the base closer to skin's own.
- Sodium PCA humectant
- Sodium PCA is one of the substances skin makes for itself to hold water, part of what dermatology calls the natural moisturising factor. Added to a formula it is a strong humectant that suits skin that dehydrates quickly.
- 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.
- 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.
- Green Tea Extract plant extract
- Camellia Sinensis is the tea plant. Green tea leaf extract carries catechins, among the most studied plant antioxidants, and is used for the look of redness and oily shine.
- 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.
- Sorbitan Olivate emulsifier
- Sorbitan Olivate is an olive-derived emulsifier, the oil-loving half of the pair sold as Olivem. It holds oil into water and leaves a light, non-waxy feel.
- Cetearyl Olivate emulsifier
- Cetearyl Olivate is the water-loving half of the olive-derived emulsifier pair. With sorbitan olivate it builds emulsions whose lipid profile is close to skin's own.
- Glycine amino acid
- Glycine is the smallest amino acid and one of the free amino acids skin holds to keep water in the outer layer. In a formula it is a humectant and a mild buffer.
- Serine amino acid
- Serine is one of the most abundant free amino acids in the outer layer of skin, where it helps hold water. Added to a formula it is a humectant.
- Glutamic Acid amino acid
- Glutamic Acid is an amino acid used as a humectant and a mild pH adjuster. It is one of the components of skin's natural moisturising factor.
- SH-Oligopeptide-1 peptide
- sh-Oligopeptide-1 is a peptide made by yeast fermentation rather than synthesis, which is what the sh prefix records. It is used for the look of firmness and skin recovery after irritation.
- Aspartic Acid amino acid
- Aspartic Acid is an amino acid used as a humectant and buffer, usually within a wider amino acid blend.
- Leucine amino acid
- Leucine is an essential amino acid used as a humectant, part of the amino acid block many Korean essences carry.
- Alanine amino acid
- Alanine is a free amino acid skin uses as part of its own moisture-holding system. In a formula it hydrates and conditions.
- Lysine amino acid
- Lysine is an essential amino acid used as a conditioning humectant in an amino acid complex.
- Arginine amino acid
- Arginine is an amino acid that does two jobs here: it holds water in the outer layer of skin, and it neutralises acidic gelling agents, which is why it often stands in for a synthetic pH adjuster.
- Tyrosine amino acid
- Tyrosine is an amino acid used as a conditioning humectant in amino acid complexes.
- Phenylalanine amino acid
- Phenylalanine is an essential amino acid used in skincare as a conditioning humectant.
- Valine amino acid
- Valine is an essential amino acid used as a humectant alongside the rest of an amino acid block.
- Threonine amino acid
- Threonine is an essential amino acid used in skincare as a humectant, normally as part of an amino acid complex rather than alone.
- Proline amino acid
- Proline is an amino acid abundant in collagen and one of skin's own humectants. Added to a formula it holds water in the outer layer.
- Isoleucine amino acid
- Isoleucine is an essential amino acid used as a conditioning humectant within an amino acid complex.
- histidine amino acid
- Histidine is an amino acid used as a humectant and a buffer, part of skin's own free amino acid pool.
- methionine amino acid
- Methionine is a sulphur-bearing essential amino acid used as a humectant and mild antioxidant.
- cysteine amino acid
- Cysteine is a sulphur-bearing amino acid used as a humectant and antioxidant. It is one of the three building blocks of glutathione.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809572895470
- Made in
- Republic of Korea
- Volume
- 50 g
- Category
- Serum & Ampoule
- Actives
- Adenosine, Allantoin, Aloe Vera, Centella Asiatica, Niacinamide, Panthenol, Peptides, Salicylic Acid, Sodium Hyaluronate, Tea Tree
- 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. 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
- Apply it on damp skin straight after toner, which is when a light fluid travels the furthest.
- Two pumps cover a face, pressed in with flat palms so nothing is dragged across the cheeks.
- Follow with a cream once the surface has turned tacky, which usually takes under a minute.
- Avoid layering three treatment serums at once, because a crowded treatment slot is where pilling and stinging start.
Worth knowing
- Introduce it on its own for a week before adding another new treatment step.
- Patch test on the jawline first if your skin reacts easily to something new.
Complete the routine
- This itemKLAIRS EGF Blue AC Calming Serum 50g$40.00

- Seal the routine in as the last stepKlairs Rich Moist Soothing Cream 80ml$42.50

- The treatment step of this routineKLAIRS Rich Moist Soothing Serum 80ml$32.50

Total for 3 items$115.00
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KLAIRS EGF Blue AC Calming Serum 50g
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
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KLAIRS, Korean-market original
A 50g calming serum for the step after toner, stocked in the Original Korean Formula.
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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