The Ordinary Niacinamide 10% + Zinc 1% Serum: A Transparent, High-Strength Staple for Oily and Congested Skin

Few skincare products have generated as much discussion as The Ordinary Niacinamide 10% + Zinc 1% Serum. With its high concentration of niacinamide and the addition of zinc PCA, this water-based serum is positioned to target concerns like excess oil, visible shine, and uneven texture—especially for those with oily or blemish-prone skin. For readers who value transparency and evidence-backed claims, this serum’s clear ingredient disclosure and supporting product-specific testing offer a compelling proposition.

What the Serum Is—and Who It’s For

The Ordinary positions this serum as a solution for dullness, uneven texture, excess oil, visible shine, enlarged pores, and textural irregularities. According to the brand, it is suitable for all skin types, with a particular emphasis on oily and blemish-prone skin. The serum is water-based, alcohol-free, oil-free, silicone-free, vegan, gluten-free, and cruelty-free, making it broadly accessible for a wide range of skincare preferences and needs. The inclusion of a patch test recommendation for sensitive skin underscores a cautious approach, particularly for those with reactivity concerns.

Formulation Details: High-Strength, Minimalist Approach

The serum contains 10% niacinamide and 1% zinc PCA, as well as a concise list of supporting ingredients such as pentylene glycol and tamarind seed gum. The pH range is specified as 5.00–6.50, which is within the typical range for facial serums. The ingredient list is fully disclosed, which is notable for readers who scrutinize formulations for allergens or preferences. The serum is also free from water-free, alcohol, oil, and silicone components, which may be appealing for those avoiding these ingredients.

Science and Testing: What’s Known About the Ingredients

Niacinamide has been a staple in dermatological research since the 1970s, valued for its multifunctional benefits such as brightening, supporting the skin barrier, and addressing visible signs of congestion. Zinc PCA, meanwhile, is recognized for its role in balancing excess sebum and enhancing niacinamide delivery. Product-specific testing confirms that the 10% niacinamide concentration in this serum results in greater skin penetration compared to lower concentrations, and safety data supports its suitability for all skin types, including sensitive skin.

Manufacturer’s Positioning and Usage Guidance

The Ordinary states that this serum enhances skin brightness, improves texture, strengthens the moisture barrier, and reduces the appearance of pores and shine. The brand recommends applying the serum to the entire face morning and evening, after cleansing and before moisturizer. Importantly, the serum should not be used in the same routine as pure or ethylated vitamin C, and a patch test is advised prior to first use. If irritation occurs, use should be discontinued.

Practical Considerations and Limitations

While the serum is positioned for a broad range of skin types and concerns, there are clear usage caveats: it should not be combined with pure or ethylated vitamin C in the same routine, and a patch test is recommended, particularly for sensitive skin. These limitations are important for readers managing complex routines or with a history of sensitivity. The ingredient transparency and product-specific testing are strengths, but as with any active serum, individual responses may vary.