Below is every ingredient in Cosrx The Niacinamide 15 Serum 20Ml Gnljfscrdqy explained, its standout actives, and the side effects reported in research for those actives — analysed for Indian skin.
Flags derived from the ingredient list using dermatology reference data (fungal-acne substrate, comedogenicity, EU allergens). General guidance, not a diagnosis.
Answers are derived from the printed ingredient list and dermatology reference data — general guidance, not a diagnosis or a therapeutic claim.
Niacinamide (vitamin B3) at 15% is a high-concentration active used to improve skin barrier function, reduce hyperpigmentation, regulate sebum, and diminish the appearance of fine lines and redness. It is generally well tolerated, though higher concentrations can increase the likelihood of transient irritation.
Acetyl glucosamine is an amino sugar that serves as a precursor to hyaluronic acid and can help support skin hydration and barrier function. It is also studied for its ability to reduce hyperpigmentation by inhibiting melanin production, often used alongside niacinamide.
Zinc PCA is the zinc salt of pyrrolidone carboxylic acid used in skincare to help control excess sebum, support antimicrobial activity, and provide mild hydration. It is commonly included in products targeting oily and acne-prone skin.
Allantoin is a naturally derived or synthetically produced compound used in skincare for its soothing, moisturizing, and keratolytic (skin-softening) properties. It promotes cell proliferation and helps calm irritation, commonly appearing in creams, lotions, and after-sun products.
Tocopherol (vitamin E) is a lipid-soluble antioxidant used in skincare to protect skin and formulations from oxidative damage caused by free radicals and UV exposure. It also functions as a skin-conditioning and emollient agent and can stabilize oils against rancidity.
Aggregated from the active ingredients in this product.
| Reported effect | How often | Notes |
|---|---|---|
| Mild transient stinging or irritation | Uncommon | More likely on compromised or sensitive skin, especially at higher concentrations. |
| Skin dryness or tightness | Rare | Possible with high concentrations in leave-on products. |
| Allergic contact dermatitis | Rare | Sensitization reported infrequently in patch-test studies. |
| Redness or erythema | Uncommon | Typically mild and resolves after discontinuation. |
| Transient flushing or warmth | Uncommon | More associated with oral niacin than topical niacinamide, but mild flushing can occur in sensitive individuals. |
| Mild stinging, tingling, or burning | Uncommon | More likely at high concentrations such as 15%, especially on compromised or sensitive skin. |
| Erythema (redness) | Uncommon | Usually mild and transient, resolving with discontinuation or reduced frequency. |
| Dryness or peeling | Rare | Can occur, sometimes related to other ingredients in the formulation. |
| Redness or itching | Rare | Typically resolves after discontinuation. |
| Mild transient irritation or stinging | Uncommon | Typically mild and resolves with continued use or reduced frequency. |
| Mild transient skin irritation or stinging | Uncommon | More likely at higher concentrations or on compromised skin barriers. |
| Contact dermatitis / allergic sensitization | Rare | Occasional case reports; patch testing can confirm. |
| Eye irritation on accidental contact | Uncommon | Relevant mainly in leave-on or rinse-off products near the eye area. |
| Mild skin irritation or stinging | Uncommon | Usually transient, more likely on sensitive or compromised skin. |
| Redness (erythema) | Uncommon | Typically mild and temporary at application site. |
| Dryness or skin tightness | Rare | May occur with overuse due to sebum-reducing effect. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
| Ingredient | What it does |
|---|---|
| Pentylene Glycol Humectant / solvent / preservative-booster | Pentylene glycol is a glycol used in cosmetics as a humectant and solvent that also enhances the antimicrobial efficacy of formulations, helping reduce reliance on traditional preservatives. It improves skin hydration and aids the delivery and stability of other ingredients. |
| Niacinamide(15%) Key active Skin-conditioning / barrier-support active | Niacinamide (vitamin B3) at 15% is a high-concentration active used to improve skin barrier function, reduce hyperpigmentation, regulate sebum, and diminish the appearance of fine lines and redness. It is generally well tolerated, though higher concentrations can increase the likelihood of transient irritation. |
| Butylene Glycol Humectant / solvent | Butylene glycol is a small diol commonly used in skincare as a humectant, solvent, and viscosity-reducing agent that helps dissolve other ingredients and improve skin feel. It is widely regarded as safe and non-sensitizing for the majority of users at cosmetic concentrations. |
| Acetyl Glucosamine Key active Skin-conditioning / exfoliant precursor | Acetyl glucosamine is an amino sugar that serves as a precursor to hyaluronic acid and can help support skin hydration and barrier function. It is also studied for its ability to reduce hyperpigmentation by inhibiting melanin production, often used alongside niacinamide. |
| 2-Hexanediol Humectant/preservative-booster | 1,2-Hexanediol (commonly written 2-hexanediol) is a multifunctional diol used in skincare primarily as a humectant, solvent, and preservative-enhancing agent that improves the antimicrobial efficacy of formulations. It is generally well tolerated and considered a base/formulation ingredient rather than a treatment active. |
| Zinc PCA Key active Sebum-regulating, antimicrobial | Zinc PCA is the zinc salt of pyrrolidone carboxylic acid used in skincare to help control excess sebum, support antimicrobial activity, and provide mild hydration. It is commonly included in products targeting oily and acne-prone skin. |
| Trehalose Humectant / moisturizer | Trehalose is a naturally occurring disaccharide used in skincare as a humectant and protective agent, helping retain moisture and stabilize cell membranes and proteins against dehydration and oxidative stress. It is well tolerated and commonly used to support skin barrier hydration. |
| Xanthan Gum Thickener/stabilizer | Xanthan gum is a polysaccharide produced by bacterial fermentation, used in skincare as a thickening, gelling, and emulsion-stabilizing agent. It improves product texture and suspension of ingredients without contributing active treatment effects. |
| Pullulan Film-forming agent / texturizer | Pullulan is a naturally derived polysaccharide produced by fermentation of starch by the fungus Aureobasidium pullulans. In skincare it forms a thin, breathable film on the skin, providing a temporary tightening or smoothing effect and helping to stabilize formulations. |
| Allantoin Key active Soothing/skin-conditioning agent | Allantoin is a naturally derived or synthetically produced compound used in skincare for its soothing, moisturizing, and keratolytic (skin-softening) properties. It promotes cell proliferation and helps calm irritation, commonly appearing in creams, lotions, and after-sun products. |
| Ethylhexylglycerin Preservative booster / skin-conditioning agent | Ethylhexylglycerin is a multifunctional glyceryl ether used in cosmetics primarily as a preservative-enhancing agent and emollient, often paired with phenoxyethanol to broaden antimicrobial efficacy. It also acts as a deodorizing agent and humectant in skincare formulations. |
| Sodium Phytate Chelating agent | Sodium Phytate is the sodium salt of phytic acid used in cosmetic formulations primarily as a chelating agent to bind metal ions, improving product stability and preventing oxidation. It can also offer mild antioxidant support and is often included at low concentrations. |
| Citric Acid pH adjuster / AHA exfoliant | Citric acid is an alpha-hydroxy acid derived from citrus fruits, used primarily to adjust and buffer formulation pH and as a chelating agent, and at higher concentrations as a mild chemical exfoliant. It can promote surface cell turnover and is sometimes included in antioxidant or brightening products. |
| Tocopherol Key active Antioxidant | Tocopherol (vitamin E) is a lipid-soluble antioxidant used in skincare to protect skin and formulations from oxidative damage caused by free radicals and UV exposure. It also functions as a skin-conditioning and emollient agent and can stabilize oils against rancidity. |
Key active = does the main work. Ingredient explanations are drawn from public databases & literature.
Peer-reviewed papers on the active ingredients in this product, via PubMed.