The "Oil-Control" Synergy

What makes this specific formula so effective is the clinical pairing of its two main ingredients. While Niacinamide is a multi-functional "skin-restorer" that brightens and smooths, the addition of Zinc PCA (Pyrrolidone Carboxylic Acid) is key for oily skin. Zinc acts as an anti-inflammatory and an oil-regulator, helping to "calm" the skin and prevent the overproduction of sebum that leads to clogged pores and shine throughout the day.

Key Features & Benefits:

Pore Refinement: Visibly tightens and reduces the appearance of enlarged pores by keeping them clear of excess oil.
Sebum Regulation: Dramatically reduces surface shine, making it an excellent "primer" step for those using the Maybelline Fit Me Matte + Poreless Foundation.
Blemish Support: While not an acne treatment, it helps soothe the skin and reduce the redness associated with active breakouts.
Brightening Properties: High-strength Niacinamide helps fade the look of lingering dark spots and improves overall skin radiance.
Water-Based Layers: The lightweight, non-oily texture sinks in quickly, allowing you to layer it under heavier creams like the iUNIK Centella Calming Gel Cream.

Product Specifications:

Brand: The Ordinary (DECIEM)
Volume: 30ml (Glass dropper bottle)
Key Ingredients: 10% Niacinamide, 1% Zinc PCA.
pH Level: 5.50–6.50 (Optimized for skin compatibility).
Safety: Vegan, Cruelty-free, Silicone-free, and Oil-free.

How to Use for a Clear, Matte Canvas:

Prep: Cleanse your face thoroughly. If you have been wearing heavy makeup like the W7 12 Hour HD Foundation, ensure all residue is removed with Garnier Micellar Water first.
Apply: Apply 2–3 drops to the entire face in the morning and evening.
Technique: Gently pat the serum into the skin. If you notice "sudsing" or white foam, you are using too much or rubbing too hard; a little goes a long way.
Conflicts: Avoid using this in the same routine as Pure Vitamin C (L-Ascorbic Acid) products, as they can cancel each other's effectiveness.
Finish: Follow with a lightweight moisturizer. For a perfectly balanced look, use the Pond's Pinkish Glow Powder over your makeup to lock in the matte effect created by the serum.

⚠️ A Quick Reminder: This serum is a "congestion-fighter," not a direct acne medication. If you have persistent acne, you can use this alongside targeted treatments to keep your skin barrier strong and your oil levels in check.