Vitamin C Serum 30ml
Vitamin C Serum is Benton's ampoule serum (30ml), built around Ascorbic Acid and 3-O-Ethyl Ascorbic Acid. It is used after toner and before moisturizer, as the routine's concentrated treatment step. This is over-labeled in English for US sale rather than reformulated for the US market.
No reviews yet30 ml
$191.67 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- NormalCombinationDrySensitive
- Helps with
- Uneven tone and visible dullnessDehydration and a barrier that feels compromisedThe look of fine lines and a loss of firmnessA concentrated treatment 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
The Vitamin C Serum is a 30ml serum, used after toner and before moisturizer, morning and evening. The antioxidant it is built around is Ascorbic Acid, named second on its own ingredient list. The same list carries Adenosine, 3-O-Ethyl Ascorbic Acid and Ferulic Acid, so the antioxidant is not the only thing on it worth naming. How much of the Ascorbic Acid stays on the skin, and for how long, is decided by the serum format rather than by the list alone. This is the Original Korean Formula, the serum Benton sells in Korea, Ascorbic Acid and all.
Key benefits
- Ascorbic Acid, the antioxidant this serum is built around
- Adenosine on the same list, an active
- 3-O-Ethyl Ascorbic Acid, Ferulic Acid and Glutathione on the same list, antioxidants
- Tocotrienols and Tocopherol further down the same list
- Prunus Armeniaca (Apricot) Kernel Oil and Oryza Sativa (Rice) Bran Oil further down the same list
- Ascorbic Acid named second on the manufacturer list printed on this page
Inside the formula
Inside the formula
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 Ascorbic Acid and not three changes at once.
Is this the Korean-market serum or a US version?
The Korean-market one, Ascorbic Acid and all. We match this serum 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 Ascorbic Acid?
Adenosine, 3-O-Ethyl Ascorbic Acid and Ferulic Acid. The order they are printed in on this serum's panel is the order on the box, so you can see where Ascorbic Acid sits relative to them. Further down the same panel: Glutathione, Tocotrienols and Tocopherol.
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 (20): Propanediol, Ascorbic Acid, Butylene Glycol, Glycerin, Pentylene Glycol, Candida Bombicola/Glucose/Methyl Rapeseedate Ferment, Glyceryl Glucoside, 3-O-Ethyl Ascorbic Acid, Panthenol, Ammonium Acryloyldimethyltaurate/ VP Copolymer, Prunus Armeniaca (Apricot) Kernel Oil, Sodium Polyacrylate, Polyquaternium-10, Adenosine, Ferulic Acid, Ectoin, Glutathione, Oryza Sativa (Rice) Bran Oil, Tocotrienols, Tocopherol
Ingredient list read from jolse.com on 10 September 2026.
20 of 20 explained
- 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.
- Ascorbic Acid antioxidant
- Ascorbic Acid is pure vitamin C, the most researched form and also the least stable: it needs a low pH and airtight packaging to stay active. It is an antioxidant used for the look of dullness and uneven tone.
- 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.
- 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.
- Candida Bombicola/Glucose/Methyl Rapeseedate Ferment ferment
- This ferment produces sophorolipids, sugar-based molecules that behave as very mild surfactants and emulsifiers. It is used to keep a formula blended without a harsh cleanser.
- Glyceryl Glucoside humectant
- Glyceryl Glucoside is glycerin bound to glucose, from the resurrection plant. It is a humectant that holds water in the outer layer of skin.
- 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.
- 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.
- 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.
- Prunus Armeniaca (Apricot) Kernel Oil emollient
- Apricot kernel oil, a light oil high in oleic acid. It absorbs quickly and is used where a formula needs softening without heaviness.
- Sodium Polyacrylate thickener
- Sodium Polyacrylate is a polymer that absorbs many times its weight in water. It thickens a formula and holds water in a gel against the skin.
8 more explained
- Polyquaternium-10 film former
- A cellulose polymer carrying a positive charge. It deposits from a rinse-off formula onto hair or skin and leaves a smooth, anti-static film.
- 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.
- Ferulic Acid antioxidant
- Ferulic Acid is a plant antioxidant from bran and seeds. Its main formulation job is stabilising vitamins C and E so a serum keeps working for longer, which is why the three appear together so often.
- Ectoin humectant
- Ectoin is a small molecule that microbes in salt flats and hot springs make to survive extreme conditions. In skincare it holds water tightly around itself, which is why it appears in formulas aimed at reactive, easily dehydrated skin.
- 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.
- Oryza Sativa (Rice) Bran Oil emollient
- Rice Bran Oil is pressed from the bran left over from milling rice. It carries vitamin E and a group of rice-specific antioxidants, and it is a light emollient.
- Tocotrienols antioxidant
- Tocotrienols are the other half of the vitamin E family, usually from rice or palm. They are oil-soluble antioxidants used alongside tocopherol.
- 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.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809566992857
- Made in
- Republic of Korea
- Volume
- 30 ml
- Category
- Serum & Ampoule
- Actives
- Adenosine, Ectoin, Glutathione, Panthenol, Rice Extract, 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
- New to this formula or to the brand: patch-test on the inner arm and wait a day before applying it to the face.
- Discontinue use and rinse the area with water if redness, itching or irritation develops.
Complete the routine
- This itemBenton Vitamin C Serum 30ml$57.50
- Cleanse first, so the next step meets bare skinBenton Honest Cleansing Foam 150g$15.00
- An as-needed step, in place of the prep layerBenton Snail Bee High Content Sheet Mask 20g X 10ea$45.00
Total for 3 items$117.50
Reviews
No reviews yet. Tell us how much you love the product!
Write a reviewWrite a review
Benton Vitamin C Serum 30ml
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
Benton, Korean-market original
Vitamin C Serum, 30ml, Benton's ampoule serum with Ascorbic Acid and 3-O-Ethyl Ascorbic Acid.
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
Ask an AI assistant about this product
Ask an AI assistant about this product
Opens ChatGPT, Perplexity or Claude in a new tab with the question prefilled. Claude asks you to sign in first.