The Ordinary Niacinamide 10% + Zinc 1% Review

The Ordinary Niacinamide 10% + Zinc 1% is a water-based facial serum from DECIEM's The Ordinary brand, launched in 2016. The Ordinary was founded with the explicit goal of stripping out the markup that typically inflates skincare pricing — luxury packaging, fragrance, marketing spend — and passing those savings directly to the consumer in the form of higher active concentrations at lower price points.

This serum combines niacinamide (vitamin B3) at a 10% concentration with zinc PCA at 1%. Niacinamide at this concentration is one of the best-studied skincare actives for reducing the appearance of pores, regulating sebum, improving skin texture, and fading post-inflammatory hyperpigmentation. Zinc PCA adds a sebum-regulating and antimicrobial dimension that makes the formula particularly effective for oily and acne-prone skin types.

For shoppers, the main appeal is simple: you get pharmaceutical-grade active concentrations at a price most drugstore moisturizers cannot match. See our full personal care rankings to understand where it sits in the broader category.

The formula is built on two actives: niacinamide at 10% and zinc PCA at 1%. Niacinamide is a water-soluble vitamin that works across multiple pathways — it visibly reduces pore size and oiliness, improves skin barrier function, reduces redness, and fades hyperpigmentation with consistent use over 8 to 12 weeks. Zinc PCA is a salt of zinc and pyrrolidone carboxylic acid that regulates sebaceous activity and provides mild antibacterial properties.

The base is a simple water and glycerin formulation with minimal additional ingredients. The full ingredient list is disclosed on both the product and the brand website without any proprietary blend masking. The formula contains no fragrance, no silicones, no alcohol, and no nut-derived ingredients. It is certified vegan by PETA.

One well-documented compatibility caveat: niacinamide and pure vitamin C (ascorbic acid) can interact at high concentrations, temporarily forming a yellowish compound. The Ordinary addresses this by recommending a separation in application timing of 30 minutes or more if both are used in the same routine.

Niacinamide works through several distinct mechanisms simultaneously. It inhibits the transfer of melanosomes (melanin-containing vesicles) from melanocytes to surrounding cells, which gradually lightens existing hyperpigmentation. It also strengthens the skin barrier by increasing ceramide synthesis, reduces transepidermal water loss, and inhibits the inflammatory cascade that contributes to acne and redness. The 10% concentration in this formula is at the upper end of what is commonly used in clinical studies.

Zinc PCA acts on the sebaceous glands, reducing excess sebum secretion. It also has mild Cutibacterium acnes inhibitory activity, which makes the combination particularly useful for acne-prone skin. The water-based texture means the formula absorbs within minutes and does not leave any occlusive residue.

Apply two to three drops to clean skin before heavier serums, oils, and moisturizers. Results for pore appearance and oiliness typically become visible within four to six weeks of consistent use. Use our comparison tool to see how this serum stacks up against alternatives in the same category.

The Ordinary Niacinamide 10% + Zinc 1% is best suited to people with oily, combination, or acne-prone skin who want to visibly reduce pore size, control sebum, and fade post-acne marks without spending much money. It is an excellent entry point for people new to active skincare because the formula is well-documented, the concentration is clearly labeled, and the price removes financial risk from the trial process.

It is also a strong addition to existing routines for those who already use retinoids or exfoliants but want a daily workhorse serum that addresses oiliness without adding complexity. The lightweight texture makes it easy to stack with other products.

It is less suited to dry skin types, which will not benefit from the sebum-regulating action, or to those with highly reactive or compromised barriers who may experience flushing at 10% niacinamide. If you are still comparing options, see our personal care guides and full rankings before settling on a final purchase.

The Ordinary Niacinamide 10% + Zinc 1% is one of the most defensible product recommendations in all of skincare. The formula is transparent, the active concentrations are clinically supported, and the price is low enough that it removes nearly all the financial risk from the decision to try it. For oily and acne-prone skin types in particular, the combination of niacinamide and zinc PCA is among the most evidence-backed affordable skincare tools available.

The brand's transparency model is genuinely rare. The Ordinary discloses every ingredient at every concentration, explains the science behind each one on its website, and actively educates consumers about how to build an effective routine rather than relying on vague efficacy claims. That approach is reflected in a near-perfect transparency score in our framework.

The limitations are real but narrow. The cruelty-free situation is the most significant ongoing concern for ethically focused buyers following Estée Lauder's acquisition of DECIEM. The 10% niacinamide concentration is at the top of the clinical range and can cause temporary flushing in sensitive skin during the first week or two of use. And while the brand's science-forward ethos is refreshing, the absence of traditional dermatologist-tested marketing means some buyers will not see the validation signals they are used to looking for.

Neither of those issues changes the fundamental calculus for the right buyer: this is an extremely well-formulated serum at a price that has no peer in the category. Read this review alongside our personal care rankings and use the comparison tool to confirm it fits your skin type and routine before buying.