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Summary
Highlights
The Niacinamide 15 Serum with Acetyl Glucosamine + Zinc PCA from COSRX is a highly concentrated serum that combines the maximum concentration of niacinamide with optimal ratios of synergistic ingredients for total acne control.
Benefits
- Niacinamide : Provides total acne care by controlling sebum production, soothing acne inflammation and diminishing post acne scars
- N-Acetylglucosamine (NAG) : Works in synergy with niacinamide to effectively fade hyperpigmentation
- Zinc PCA : Inhibits inflammation and promotes recovery of damaged skin
- Allantoin : Promotes collagen synthesis to facilitate skin regeneration
Item 2607695
After cleansing, during the serum phase, apply a few drops to the skin. Use fingertips to gently massage and absorb the serum, starting from the center of the face working towards the edges. Highly concentrated serums should only be used in the evening? NO! This serum can be used in the morning and/or night. If applied in the morning, be sure to use with a SPF of 30 or higher.<
Water, Pentylene Glycol, Niacinamide(15%), Butylene Glycol, Acetyl Glucosamine, 1,2-hexanediol, Zinc Pca, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol.
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Questions
Ask a QuestionQ&A
Showing 16 out of 16 Questions
- Q
Can we use this after applying VitC serum?
- Asked by TL
- Official Answer By COSRX - Brand EngageWe recommend applying them at different times. They both can be used in the morning or afternoon. If applied in the morning, be sure to use with a SPF of 30 or higher. As always, please patch test any new products to ensure they work well with your skin.Was this answer helpful to you
- Q
Can I use this if I use tret every night on my face
- Asked by Rae
- Official Answer By COSRX - Brand EngageIt's important to introduce new products gradually and monitor your skin's response. We recommend applying the niacinamide serum in the morning and using tretinoin at night, allowing your skin to adjust to both ingredients. If you experience any irritation, consider spacing out their usage or consulting with a dermatologist for personalized advice.Was this answer helpful to you
- Q
There is a clear liquid and then cloudy, chunky, balls that don't disintegrate. Is that what it's supposed to look like? Also the dropper is terrible and theres not much coming out
- Asked by Kristie
- Official Answer By COSRX - Brand EngageDue to the high concentration of active ingredients, the formula may sometimes clump. This is not a defect—simply remove any clumps before use.Was this answer helpful to you
- Q
Hi I'm using the REN toner for brightening dark spots. Is it okay to use this with that? Ingredients Aqua (Water), Sodium Lactate, Lactic Acid, Heptyl Glucoside, Potassium Azeloyl Diglycinate, Triethyl Citrate, Glyceryl Caprylate, Salix Nigra (Willow) Bark Extract, Benzoic Acid, Citrus Nobilis (Mandarin) Peel Oil, Citrus Aurantium Dulcis (Orange) Flower Oil, Citrus Grandis (Grapefruit) Peel Oil, Citrus Tangerina (Tangerine) Peel Oil, Heptanol, Parfum* (Fragrance), Limonene
- Asked by Katie
- Official Answer By COSRX - Brand EngageHi! Unfortunately, we can't provide information using with other brands.Was this answer helpful to you
- Q
Can I use the glycolic acid exfoliating toner with this product together ?
- Asked by katie
- Official Answer By COSRX - Brand EngageBoth products can be used together, but we recommend performing a patch test first and monitoring the reaction before regular use.Was this answer helpful to you
- Q
How high is the niacinamide percentage?
- Asked by C
- Official Answer By COSRX - Brand EngageThe product contains 15% of niacinamide.Was this answer helpful to you
- Q
Should this be used before or after Snail 96 Mucin Power Essence?
- Asked by Kat
- Official Answer By COSRX - Brand EngageWhen applying skincare products, please apply the most active first, or go with the ingredient that you want your skin to benefit from most. You can apply the niacinamide serum first but if your skin feels irritated, please use the snail essence first.Was this answer helpful to you
- Q
can this be used following the application of mandelic acid at night?
- Asked by m
- Official Answer By COSRX - Brand EngageThis product is highly concentrated and may cause irritation when used alone. While it’s difficult to provide a clear answer regarding its use with other brands' products, we recommend avoiding mixing it with other irritating products.Was this answer helpful to you
- Q
Is it recommended to use this with Advanced Snail 96 Mucin Power Essence, or should they be used separately?
- Asked by Kat
- Official Answer By COSRX - Brand EngageThis product is compatible for use with Advanced Snail 96 Mucin Power Essence :)Was this answer helpful to you
- Q
Can this be used with vitamin C in the morning.
- Asked by Rose
- Official Answer By COSRX - Brand EngageWe recommend using Niacinamide and vitamin C separately because both ingredients are high-concentrated and it can be caused too much irritation to skin.Was this answer helpful to you
- Q
Does this have any snail product in it at all? Also can I use a toner before using this or is it more effective to just use it worh a moisturizer?
- Asked by K
- Official Answer By COSRX - Brand EngageThis product does not contain snail-related ingredients. Please refer to the following recommended applying skin care order; Toner -> Essence/Ampoule/Serum -> Moisturizer/Cream. We recommend to use this product after the toner and before your application of a moisturizer.Was this answer helpful to you
- Q
Does this product have any type of silicone in it?
- Asked by DLG
- Official Answer By COSRX - Brand EngageNo, there's no silicone inside the product. No worries!Was this answer helpful to you
- Q
I don't see any in the ingrients but.. is this oil free?
- Asked by angie
- Official Answer By COSRX - Brand EngageHi, Tocopherol, a form of Vitamin E derived from vegetable oils, is included in the list. Ingredient list: Water, Pentylene Glycol, Niacinamide(15%), Butylene Glycol, Acetyl Glucosamine, 1,2-Hexanediol, Zinc PCA, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol.Was this answer helpful to you
- Q
Can you use this with a retinol and if so when in the process would you use it?
- Asked by JDC
- Official Answer By COSRX - Brand EngageWe recommend use The Niacinamide 15 Serum with sunscreen (up to SPF 30) in the morning, and to use retinol at night time. Or you can alternatively use niacinamide and retinol every other day.Was this answer helpful to you
- Q
Is it used before you moisturize?
- Asked by Hanna
- Official Answer By COSRX - Brand EngageIt is recommended to use before moisturizer.Was this answer helpful to you
- Q
What is percentage of Niacinamide? Is it 5% ??
- Asked by Curious senior trying to save face!
- Official Answer By COSRX - Brand Engage15%Was this answer helpful to you
Reviews
Write A REVIEWReview Snapshot
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Ratings Distribution
Skin Type
Most Helpful Positive Review
Magic rednesss/acne/pore eraser for my fair skin!
I am in LOVE with this serum. It just works like straight up magic on my face and addresses so many things all at once with absolutely zero irritation at all. I have fair-light combination skin that, thanks to my irish ancestors, makes any blemish and any leftover healing spots a bright red glaringl...
Most Helpful Critical Review
It's an okay serum
Received for free courtesy of influenster and cosrx for my honest review. The packaging of the rx line is super simplistic and minimalistic, like the black/white look. This bottle was short and round. The Niacinamide 15 is a concentrated serum that has 15% Niacinamide. The serum is nice. Its almost ...
608 results
Great product
Great product for matire skin. The packaging needs improvement. The suction doesnt get any product out so i have to pour directly from the bottle.
thought niacinamide wasnt for me until i tried this one..
I notice a difference in my acne overnight
Drastically improved smile lines & redness
I've had smile lines on my left side that just stayed constantly creased for about the past 1.5 years—but now after using my first full bottle of this, they're almost totally gone! I've also been dealing with what seems to be perioral dermatitis (red blotchiness & occasional bumpy breakouts on smile lines & under nose; still in the process of figuring this out with my dermatologist)—& this is almost entirely gone too! I've tried so many different products, including prescriptions, and this is the first thing that has actually done the trick for both issues. Both issues do seem to resurface slightly if stop using this one for a few days, but never look as severe as before.
Good serum BUT terrible packaging
The serum itself is nice, didnt irritate my skin (i have sensitive skin). But the packaging is horrible. First, its quite small for what we pay for. Second, the suction tube doesn't take up much or release enough of the serum. There's a bit thats stuck, no matter how many times i try to squeeze it out, its still there. You have to squeeze at least twice to get a good amount for face and neck. The packaging is the only reason I wouldn't buy again. I hope they upgrade.
Doesn't do anything
Didnt help my skin. Waste of money