beplain
Lemon C Glutathione Brightening Ampoule 30ml
A brightening ampoule, sold in a 30ml bottle, for skin with uneven tone that wants a concentrated brightening step.
No reviews yet30 ml
$100.00 per 100 ml
- 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
- A more even looking toneA brighter looking finishA concentrated evening step
In stock. Arrives in 3 to 7 business days
We accept
You’re $100.00 away from free US shipping.
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
It is a light fluid used a few drops at a time after the watery step. It settles quickly and leaves nothing on the surface, so a cream can follow at once. That is the difference from a cream, which is built mostly to hold what is already there rather than to concentrate one job into a thin layer. Its place is after the toner and before the moisturizer, on skin that is still slightly damp. What you can judge yourself is how the skin looks and feels a few minutes later, and how it behaves under the rest of the routine.
Key benefits
- delivers a short, concentrated course of treatment rather than an everyday habit
- is sized for the way it is actually sold and used on Korean shelves
- is the authentic Korean-market formula, not a US-shelf reformulation
- carries the intact Korean-market packaging and batch code rather than an over-labeled substitute
Inside the formula
Inside the formula
What is this product, and who is it for?
It is a brightening ampoule in a 30ml bottle, made for skin with uneven tone that wants a concentrated brightening step. A moisturizer cannot do the same thing here, because it is spread thicker and does more general work. You can judge it on how quickly it settles and how the face looks once the cream is on over it.
Where in my routine does this go?
After the watery step and before the moisturizer. The order that works is thinnest to thickest, so cleanser, then toner, then this, then cream, then sunscreen in the morning. Apply it while the face is still slightly damp. If you use more than one serum, put the thinnest one on first and give each a moment to settle.
How much should I use?
Three or four drops, or a dab about the size of a small pea, is enough for a whole face. Press it in rather than rubbing, working from the centre outward. Twice a day is normal, morning and night. Using more per application will not do more; it will mostly sit on the surface and transfer onto your collar.
Can I layer this with my other serums?
Yes, as long as you go thinnest to thickest and give each layer a few seconds. Put the most watery product on first, then this, then anything richer. Two serums doing the same job is redundant rather than harmful. If a layer feels wet, wait rather than piling the next one on top of it.
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 (28): Water, Glycerin, Butylene Glycol, Niacinamide, Lemon Fruit Juice, 1,2-Hexanediol, Aminobutyric Acid, Hydroxyacetophenone, Carbomer, Panthenol, Polyglyceryl-10 Laurate, Propanediol, Xanthan Gum, Arginine, Ethylhexylglycerin, Adenosine, Sodium Phytate, Gardenia Florida Fruit Extract, Glutathione, Dextrin, Dipropylene Glycol, Gluconolactone, Sodium Hyaluronate, Capryloyl Salicylic Acid, Hydrolyzed Hyaluronic Acid, 3-O-Ethyl Ascorbic Acid, Coptis Japonica Root Extract, Sodium Acetylated Hyaluronate
Ingredient list read from beplain.co.kr on 30 August 2026.
26 of 28 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.
- 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.
- 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.
- 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.
- Hydroxyacetophenone preservative booster
- Hydroxyacetophenone is an antioxidant that also strengthens a preservative system, so a formula needs less traditional preservative. Korean formulas pair it with 1,2-hexanediol constantly.
- 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.
- 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.
- Polyglyceryl-10 Laurate emulsifier
- Polyglyceryl-10 Laurate is a sugar-derived emulsifier and solubiliser, mild enough to be a standard choice in Korean essences. It dissolves small amounts of oil into water without any tightening feel.
- 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.
- 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.
- 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.
14 more explained
- 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.
- 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.
- 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.
- Gardenia Florida Fruit Extract plant extract
- Gardenia Fruit Extract is the traditional East Asian yellow dye plant. In skincare it is used as an antioxidant extract, and it can tint a formula.
- Glutathione antioxidant
- Glutathione is a small peptide the body uses as one of its main antioxidants. In skincare it is used as an antioxidant and for the look of dullness; it is unstable in water, so formulas that carry it are usually built around protecting it.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 3-O-Ethyl Ascorbic Acid antioxidant
- 3-O-Ethyl Ascorbic Acid is a stable vitamin C derivative that skin converts to ascorbic acid. It survives in a formula far better than pure vitamin C and works at a gentler pH, so it suits skin that finds the pure acid uncomfortable.
- 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.
- 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.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809623944102
- Made in
- Republic of Korea
- Volume
- 30 ml
- Category
- Serum & Ampoule
- Actives
- Adenosine, Glutathione, Hyaluronic Acid, Niacinamide, Panthenol, Salicylic Acid, Sodium Hyaluronate, Vitamin C
- 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 after your toner, while the face is still slightly damp, so a thin layer spreads without dragging.
- Three or four drops cover the whole face; press it in with the flats of the fingers rather than rubbing.
- Follow with a moisturizer within a minute so the thin layer has something holding it down.
- Do not stack it under a second serum doing the same job, since more layers is not the same as more result.
Worth knowing
- Patch test on a small area of the jaw first if your skin reacts easily to something new.
- Keep it capped and out of sunlight, and wear sunscreen daily while you use a brightening step.
Complete the routine
- This itembeplain Lemon C Glutathione Brightening Ampoule 30ml$30.00
- The treatment step of this routinebeplain BHA Peeling Ampoule 30ml$27.50
- Cleanse first, so the next step meets bare skinbeplain Mung Bean pH-Balanced Cleansing Foam 80ml$17.50
Total for 3 items$75.00
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beplain Lemon C Glutathione Brightening Ampoule 30ml
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
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beplain, Korean-market original
A brightening ampoule in a 30ml bottle that concentrates the brightening step into a few drops.
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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