Below is every ingredient in The Ordinary Niacinamide 10Percent Zinc 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) is a water-soluble active that supports the skin barrier, regulates sebum, brightens hyperpigmentation, and reduces inflammation. It is widely tolerated across skin types and used in concentrations commonly ranging from 2% to 10%.
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.
Aggregated from the active ingredients in this product.
| Reported effect | How often | Notes |
|---|---|---|
| Irritation or sensitivity | Very rare | Purified water itself is essentially inert; rare reactions are attributable to contaminants or accompanying ingredients rather than water. |
| Transepidermal water loss aggravation in compromised skin | Rare | Evaporation of water from products may transiently increase dryness in very compromised skin barriers if occlusives are absent. |
| Mild transient flushing or redness | Uncommon | More likely at higher concentrations or in sensitive skin; usually subsides quickly. |
| Tingling, stinging, or burning sensation | Uncommon | Often associated with higher percentages or compromised barrier. |
| Contact irritation or itching | Rare | Generally dose-dependent and resolves with discontinuation. |
| Allergic contact dermatitis | Very rare | Documented in isolated case reports; true sensitization is unusual. |
| 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. |
| Redness or erythema | Uncommon | Typically mild and resolves after discontinuation. |
| 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. |
| Mild skin irritation | Rare | Occasional transient redness or stinging, usually in sensitive skin. |
| Skin irritation | Rare | Mild irritation possible in sensitive individuals, generally low risk topically. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
| Ingredient | What it does |
|---|---|
| Aqua Solvent / vehicle | Aqua (water) is the most common base ingredient in skincare formulations, serving as a solvent that dissolves water-soluble components and forms the medium for emulsions. It has no direct treatment activity and primarily contributes to texture, spreadability, and product delivery. |
| Niacinamide Key active Cell-communicating / barrier-repair active | Niacinamide (vitamin B3) is a water-soluble active that supports the skin barrier, regulates sebum, brightens hyperpigmentation, and reduces inflammation. It is widely tolerated across skin types and used in concentrations commonly ranging from 2% to 10%. |
| 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. |
| 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. |
| Tamarindus Indica Seed Gum Thickener / humectant | Tamarindus Indica Seed Gum is a polysaccharide derived from tamarind seeds, used in skincare as a natural thickening, film-forming, and water-binding agent. It provides hydration and improves texture and stability of formulations. |
| Carrageenan Thickener/film-former | Carrageenan is a sulfated polysaccharide derived from red seaweed used in skincare as a thickening, gelling, and stabilizing agent. It forms a hydrating film on the skin and helps stabilize emulsions and suspensions. |
| Acacia Senegal Gum Film-former / stabilizer | Acacia Senegal gum (gum arabic) is a natural polysaccharide derived from acacia tree sap, used in skincare as a thickener, emulsion stabilizer, and film-forming agent that imparts a smooth feel and helps suspend ingredients. It is generally regarded as a non-active, well-tolerated formulation ingredient. |
| 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. |
| Cocoyl Proline Surfactant / conditioning agent | Cocoyl Proline is an amino acid-derived (coconut fatty acid plus proline) ingredient used as a mild surfactant and skin-conditioning agent in cleansers and emulsions. It functions as a base/formulation ingredient rather than a therapeutic active. |
| Ethoxydiglycol Solvent / penetration enhancer | Ethoxydiglycol (diethylene glycol monoethyl ether) is a glycol ether used in cosmetic formulations primarily as a solvent and viscosity reducer that helps dissolve active ingredients and improve their skin penetration. It is considered a formulation aid rather than a therapeutic active. |
| Phenoxyethanol Preservative | Phenoxyethanol is a widely used broad-spectrum preservative that protects cosmetic and skincare formulations from bacterial and fungal contamination. It is typically used at concentrations up to 1% and serves as a formulation/base ingredient rather than an active treatment. |
| Chlorphenesin Preservative / antimicrobial | Chlorphenesin is a synthetic antimicrobial agent used in cosmetics and skincare as a preservative to inhibit the growth of bacteria, yeast, and mold. It is also occasionally used for its mild muscle-relaxant and antifungal properties in topical formulations. |
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.