Cell Fusion C Toning C Dark Spot Serum 30ml
Toning C Dark Spot Serum is Cell Fusion C's ampoule serum (30ml), built around Niacinamide and 3-O-Ethyl Ascorbic Acid. It is used after toner and before moisturizer, as the routine's concentrated treatment step. This is the Original Korean Formula, not a version reworked for US retail.
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- Suited to
- Congested skinUneven textureDehydrated skinSensitive skin
- Helps with
- Shoppers looking for Niacinamide in a serumRoutines that want Niacinamide and Allantoin in one stepFilling the serum step with a Korean-market formulaAnyone who wants the Niacinamide serum sold on Korean shelves
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- 30-day returns
- Free US shipping on orders of $100 or more
- Dispatched within 2 business days
Key benefits
- Niacinamide, the active this serum is built around
- Allantoin and Adenosine on the same list, actives
- Sphingomonas Ferment Extract on the same list, a ferment
- 3-O-Ethyl Ascorbic Acid on the same list, an antioxidant
- Tocopherol and Ferulic Acid further down the same list
- Fullerenes and Ascorbic Acid further down the same list
Key actives
Niacinamideactive
Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. On this serum's own ingredient list it is named third.
Allantoinactive
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. The panel names it thirteenth on this serum's list, beside Niacinamide.
Adenosineactive
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. The panel names it twenty-second on this serum's list, beside Niacinamide.
Sphingomonas Ferment Extractferment
Sphingomonas Ferment Extract is the liquid left after Sphingomonas bacteria have fermented a sugar substrate. It carries water-holding polysaccharides and is used as a conditioning ferment. It is named sixth on this serum's list, alongside Niacinamide.
3-O-Ethyl Ascorbic Acidantioxidant
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. It is named fifth on this serum's list, alongside Niacinamide.
How to use
- Apply after toner and before moisturizer. Pat or smooth it over a cleansed face and let it absorb before the next step, AM and PM.
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 Niacinamide and not three changes at once.
Is this the Korean-market serum or a US version?
The Korean-market one, Niacinamide 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.
Does this serum contain fragrance?
Yes. The ingredient list names Geraniol and Limonene. They sit on the panel printed on this page, so you can read the position for yourself before you buy. If fragrance components are something you avoid, this serum is not the one.
What else is on the list besides Niacinamide?
Allantoin, Adenosine and Sphingomonas Ferment Extract. The order they are printed in on this serum'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, Tocopherol and Ferulic Acid.
- Ships from
- California
Duties are prepaid. Nothing is owed at delivery. Returns are accepted for 30 days, by mail.
Orders ship from our California warehouse, dispatched within 2 business days, and arrive in 3 to 5 days. Shipping is free on orders of $100 or more.
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 - 2Customs
Duty paid by us before it enters the US - 3California
Ships domestically, no international leg
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.
Import duties are paid by us before the parcel reaches you, so nothing is owed at the door, 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.
Payment and security
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How it works
The Toning C Dark Spot Serum is a 30ml serum, used after toner and before moisturizer, morning and evening. The active it is built around is Niacinamide, named third on its own ingredient list. The same list carries Allantoin, Adenosine and Sphingomonas Ferment Extract, 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 serum format rather than by the list alone. This is the Original Korean Formula, the serum Cell Fusion C sells in Korea, Niacinamide and all.
Worth knowing
- Patch test this serum on a small area and wait a day before using it more widely, especially with Niacinamide on the list.
- This list names Geraniol and Limonene, so skip it if fragrance components are something you avoid.
Reviews
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Korean-market original
Toning C Dark Spot Serum, 30ml, Cell Fusion C's ampoule serum with Niacinamide 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.
Match the batch code on the box against the code printed on the bottle or tube itself; the two are stamped separately and should agree.
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.
Allantoin can tone down the dryness of the individual cells. It increases the water content of the skin, which means it helps to hydrate and moisturize.
Wilma Bergfeld, MDDermatologist, Cleveland Clinic Using topical vitamin C can result in less cell damage and better-looking skin.
Melissa Piliang, MDDermatologist, Cleveland Clinic
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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