The Ordinary Niacinamide 10% + Zinc 1% ingredients

What do the key ingredients do?

Niacinamide helps balance excess sebum, the oil your skin produces, and supports a smoother, brighter appearance. It also supports the skin's natural ceramide content. Ceramides are part of the skin's protective barrier, which helps prevent moisture loss. The Ordinary positions this serum for oily and blemish prone skin, particularly for excess shine and visible pores. The serum targets shine, texture and dullness, so its name is more chemistry register than job description.2

Zinc PCA is zinc bound to PCA, a natural moisturizing factor found in skin. The PCA component attracts and holds water, while zinc PCA also helps balance excess oil. In this formula, zinc PCA supports hydration and improves the delivery of niacinamide into the skin.12

How do you use the serum?

1. 1Patch test before adding the serum to your routine.
2. 2After cleansing, apply 2 to 3 drops across the face and neck.
3. 3Let the serum absorb before applying the next product.
4. 4Apply oils and heavier moisturizers afterwards.

The serum can be used morning and evening. If you have sensitive skin and are concerned about irritation, start on 1 to 2 days a week and gradually increase frequency if tolerated. Stop using the serum if irritation develops.12

Overapplication or incorrect layering can leave the serum sticky or cause pilling under makeup, giving the makeup an unsolicited texture. If products still pill together, alternate them on different days rather than adding more layers.1

What can you pair it with?

The serum pairs with hyaluronic acid, retinoids and salicylic acid. The Ordinary advises against combining this serum with direct or indirect vitamin C in the same routine. Separate the products into different routines instead.1

How soon should you expect a change?

General niacinamide guidance puts visible results at about 4 to 8 weeks of daily use. Hydration and texture improvements can appear within a few weeks; dark spots and fine lines can take longer.2