The Niacinamide 15 Serum
The Verdict & Review beautydecoded:
Dry skin: Very good
Oily skin: Very good
Anti-aging effectiveness: Good ✅
Effectiveness on blemishes: Good ✅
Effectiveness Hyperpigmentation: Low
Effectiveness on redness: Very good ⭐
Sensitive skin: Good ✅
Description
AQUA, PENTYLENE GLYCOL, NIACINAMIDE (Vitamin B3), BUTYLENE GLYCOL, ACETYL GLUCOSAMINE (Antioxidant), 1,2-HEXANEDIOL, ZINC PCA (Zinc), TREHALOSE (Sugar), XANTHAN GUM, PULLULAN, ALLANTOIN (Active ingredient derived from comfrey), ETHYLHEXYLGLYCERIN, SODIUM PHYTATE, CITRIC ACID, TOCOPHEROL (Vitamin E)My Doctor's Diagnosis: Analysis and Target
Make the right choices for your skin
Say goodbye to unnecessary get visible results!
The serum Cosrx The Niacinamide 15 Serum is primarily intended for skin prone to blemishes, excess sebum, enlarged pores, and hyperpigmentation. The high concentration of niacinamide (15%) positions this product as an expert solution for combination to oily skin, but also for those who wish to reduce pigmentation spots and strengthen the skin barrier. My opinion: Cosrx's formula is ambitious, targeting sebum regulation, breakout prevention, and improved radiance.
Formula Analysis: Key Assets
Three major active ingredients stand out in this serum:
- Niacinamide (15%) : This key ingredient acts to reduce imperfections, regulate sebum, and fade dark spots. It stimulates ceramide synthesis, strengthens the skin barrier, and has recognized anti-inflammatory properties.
- Zinc PCA Zinc is beneficial for acne-prone skin. It limits bacterial growth, regulates sebum production, and soothes irritation.
- Acetyl Glucosamine : This active ingredient promotes cell renewal and works in synergy with niacinamide to lighten pigmentation spots.
The synergy of these active ingredients gives the product remarkable effectiveness in addressing issues related to pores, radiance, and sebum control.
Tips and Application Ritual
I recommend applying this serum in the morning and/or evening, on clean, dry skin, before your moisturizer. It pairs perfectly with simple moisturizers or hyaluronic acid-based skincare products. However, it is best to avoid combining it with products that are highly concentrated in pure vitamin C or exfoliating acids (AHA/BHA) to limit the risk of irritation.
My Final Verdict & Safety Opinion
Visit Cosrx The Niacinamide 15 Serum stands out for its high concentration of active ingredients and minimalist formula, free from fragrance and alcohol. Its strengths lie in its effectiveness on pores, radiance, and preventing blemishes. One possible drawback: the high concentration of niacinamide may cause slight tingling on very sensitive skin. My opinion as a doctor: an excellent choice for combination to oily skin, to be gradually incorporated into your routine.
Informations complémentaires
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Written review of the BeautyDecoded application -
an unpleasant surprise
it's one of the first Korean skincare products I bought. I know that the combination of zinc PCA and niacinamide is effective. However, the high niacinamide content of this product should not be overlooked. At first, everything was going great: beautiful skin, 0 impurities, skin texture as smooth as ever for weeks on end. Halfway through the bottle, I slowly finished the product and that's when my skin cried out for help: red patches, facial burns!
I don't understand but weeks later, my skin literally rejected the product and was prone to severe reactions.
so be careful with this product
Written review of the BeautyDecoded application -
refined, improved skin texture
i've been using it for 15 days now, and i've got no more pimples and my pores are tighter. i should mention that i live in the tropics, where the weather is hot and humid, so its texture is perfect because it's quickly absorbed into the skin. i have the impression that my brown spots are starting to fade too, so it remains to be seen in the long term...