The Ordinary Niacinamide 10% + Zinc 1%

The Ordinary Niacinamide 10% + Zinc 1% has earned its cult status as the ultimate budget-friendly blemish fighter. At under $8, this water-based serum delivers clinical-strength niacinamide that visibly reduces pore size, regulates sebum production, and brightens uneven skin tone - all without breaking the bank.

The lightweight, slightly viscous texture absorbs quickly, though I've learned to use a light hand and let it fully dry before layering other products to avoid pilling. Within two weeks of consistent use, my T-zone oil production noticeably decreased, and my pores looked refined. After a month, old acne marks faded significantly, and new breakouts were less frequent and less severe.

The 1% zinc PCA works synergistically with niacinamide to calm inflammation and control excess oil, making this ideal for oily and acne-prone skin types. The formula is fragrance-free and contains minimal ingredients, which my sensitive skin appreciates. Some users experience an initial purging phase as the serum brings congestion to the surface - this is normal and temporary.

The dropper bottle is functional but basic, and the serum can oxidize if exposed to light for extended periods, so I keep mine in a drawer. For the price point, this is hands-down the best niacinamide serum on the market. It's become a non-negotiable step in my routine, and I've repurchased it countless times. If you're dealing with enlarged pores, oiliness, or post-acne marks, this is your solution.