C-Niacin Toning Ampoule
C-Niacin Toning Ampoule is Isntree's concentrated, fast-absorbing booster, formulated for dullness and an uneven-looking tone. Built around Hippophae Rhamnoides Fruit Extract and Niacinamide, it is aimed at dehydration and tight-feeling skin and dullness and uneven texture.
No reviews yet50ml
$31.98 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Dehydrated skinSensitive skinDull, uneven tone
- Helps with
- Shoppers looking for Niacinamide in an ampouleRoutines that want Niacinamide and Dipotassium Glycyrrhizate in one stepFilling the ampoule step with a Korean-market formulaAnyone who wants the Niacinamide ampoule sold on Korean shelves
Sold out.
Tell us where to send it
One email, the moment this exact unit is back in stock. Not a newsletter and not a sequence, and your address comes off the list the second it is sent.
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
The C-Niacin Toning Ampoule is a 50ml ampoule, used after toner and before moisturizer, morning and evening. The active it is built around is Niacinamide, named seventh on its own ingredient list. The same list carries Dipotassium Glycyrrhizate, Allantoin and Bioflavonoids, 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 ampoule format rather than by the list alone. This is the Original Korean Formula, the ampoule Isntree sells in Korea, Niacinamide and all.
Key benefits
- Niacinamide, the active this ampoule is built around
- Dipotassium Glycyrrhizate and Allantoin on the same list, actives
- Bioflavonoids and 3-O-Ethyl Ascorbic Acid on the same list, antioxidants
- Beta-Glucan and Hippophae Rhamnoides Fruit Extract further down the same list
- Aloe Barbadensis Leaf Extract and Melia Azadirachta Leaf Extract further down the same list
- Niacinamide named seventh on the manufacturer list printed on this page
Inside the formula
Inside the formula
Isntree C-Niacin Toning Ampoule
Where does this ampoule go in my routine?
After toner and before moisturizer, morning and evening. Anything thinner than an ampoule 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 ampoule or a US version?
The Korean-market one, Niacinamide and all. We match this ampoule 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?
Dipotassium Glycyrrhizate, Allantoin and Bioflavonoids. The order they are printed in on this ampoule's panel is the order on the box, so you can see where Niacinamide sits relative to them. Further down the same panel: 3-O-Ethyl Ascorbic Acid, Beta-Glucan and Hippophae Rhamnoides Fruit 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 (32): Hippophae Rhamnoides Fruit Extract, Butylene Glycol, Pentylene Glycol, Glycerin, Betaine, Water, Niacinamide, Propanediol, Aloe Barbadensis Leaf Extract, Melia Azadirachta Flower Extract, Melia Azadirachta Leaf Extract, Cucurbita Pepo (Pumpkin) Fruit Extract, Physalis Alkekengi Fruit Extract, Sodium Hyaluronate, Dipotassium Glycyrrhizate, Ocimum Sanctum Leaf Extract, Beta-Glucan, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Brassica Oleracea Italica (Broccoli) Extract, Coccinia Indica Fruit Extract, Moringa Oleifera Seed Oil, Boswellia Serrata Resin Extract, Bioflavonoids, Panthenol, Allantoin, Sodium Polyacrylate, Ammonium Acryloyldimethyltaurate/VP Copolymer, 3-O-Ethyl Ascorbic Acid, Ethyl Hexanediol, Polysorbate 80, 1,2-Hexanediol
Ingredient list read from inkeedecoder.com on 10 September 2026.
30 of 32 explained
- Hippophae Rhamnoides Fruit Extract plant extract
- Sea Buckthorn Fruit Extract is high in vitamin C and carotenoids, which give it a strong orange colour. It is used as an antioxidant extract.
- 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.
- 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.
- 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.
- Betaine humectant
- Betaine is a sugar-beet-derived humectant that cells use to hold water. In a formula it hydrates and takes the edge off cleansers and acids, which is why it often appears alongside them.
- 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.
- 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.
- Aloe Barbadensis Leaf Extract plant extract
- Aloe Leaf Extract is mostly water with polysaccharides, amino acids and mild plant acids. It hydrates and leaves a light, cooling film, which is why it is the default after-sun ingredient.
- Melia Azadirachta Flower Extract plant extract
- Melia Azadirachta is neem. Its leaf and flower extracts are long-standing Ayurvedic ingredients, and Korean formulas use them in products aimed at the look of congested, blemish-prone skin.
- Cucurbita Pepo (Pumpkin) Fruit Extract plant extract
- Pumpkin fruit extract, carrying carotenoids, sugars and enzymes. It is used as a conditioning 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.
18 more explained
- 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.
- Ocimum Sanctum 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.
- 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.
- Curcuma Longa (Turmeric) Root Extract plant extract
- Turmeric Root Extract carries curcuminoids, well studied plant antioxidants. It is used for the look of dullness and uneven tone, and it tints a formula faintly yellow.
- Corallina Officinalis Extract plant extract
- Corallina Officinalis is coral seaweed, which holds calcium and magnesium in its structure. Its extract is used as a mineral-rich conditioning ingredient.
- Brassica Oleracea Italica (Broccoli) Extract plant extract
- Broccoli extract, carrying sulforaphane and vitamin C. It is used as a plant antioxidant.
- Coccinia Indica Fruit Extract plant extract
- Coccinia Indica is ivy gourd. Its fruit extract is used as a conditioning, hydrating plant extract in Korean formulas.
- Moringa Oleifera Seed Oil emollient
- Moringa Seed Oil is high in oleic acid and behenic acid and very stable. It is a conditioning emollient with a light, non-sticky finish.
- Boswellia Serrata Resin Extract plant extract
- Frankincense resin extract. The resin carries boswellic acids and aromatic terpenes, and in a formula it is a botanical extract that also contributes scent.
- Bioflavonoids antioxidant
- Bioflavonoids is a collective declaration for the flavonoid fraction of a plant extract, usually citrus. It names a class of plant antioxidants rather than one compound.
- 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.
- 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.
- 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.
- 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.
- 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.
- Ethyl Hexanediol humectant
- Ethyl Hexanediol is a glycol that hydrates and makes a formula less hospitable to microbes, the same double role 1,2-hexanediol plays.
- Polysorbate 80 emulsifier
- Polysorbate 80 is an emulsifier and solubiliser used to keep oils, fragrance and oil-soluble actives dissolved in water.
- 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.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809187049350
- Made in
- Republic of Korea
- Volume
- 50ml
- Category
- Serum & Ampoule / Brightening ampoule
- Actives
- Allantoin, Aloe Vera, Beta-Glucan, Licorice Root, Niacinamide, Panthenol, Sea Buckthorn, 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
- Use the C-Niacin Toning Ampoule after toner and before moisturizer, morning and evening.
- Half a dropper, or two or three drops, is the amount for a whole face. Press it in rather than spreading it thin.
- It sits between the toner and the moisturizer, and it is the layer most worth leaving alone for a minute before anything covers it.
- Twice a day, every day. Do not use it as a spot application on one area; an ampoule is a routine step, not a targeted dose.
Worth knowing
- Patch test this ampoule on a small area and wait a day before using it more widely, especially with Niacinamide on the list.
- Introduce this ampoule on its own for the first week, so anything your skin does is traceable to the Niacinamide rather than to three changes at once.
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Isntree C-Niacin Toning Ampoule
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Isntree, Korean-market original
The Original Korean Formula ampoule from Isntree, 50ml formulated with Niacinamide and Dipotassium Glycyrrhizate, 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.
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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