How to Use OUAI B3 Nice 10% Niacinamide Serum for Pore Minimizing and Oil Control
By OUAI | Published: 2026-07-27
Category: How-to Guides
Learn how to use OUAI B3 Nice 10% Niacinamide Serum to minimize pores and control oil. Step-by-step routine tips, benefits, and pairing advice for oily skin.
If you struggle with enlarged pores, excess shine, or uneven texture, niacinamide is your skin’s best friend. OUAI B3 Nice 10% Niacinamide Serum delivers a potent dose of this multitasking ingredient to refine pores, regulate oil production, and strengthen the skin barrier—all without irritation. Whether you have oily, combination, or acne-prone skin, this serum can transform your complexion with consistent use.

In this guide, we’ll walk you through exactly how to use OUAI B3 Nice 10% Niacinamide Serum for maximum pore-minimizing and oil-control benefits. From the correct order in your routine to layering tips and common mistakes to avoid, you’ll learn everything you need to get the most out of this powerhouse serum.
Why OUAI B3 Nice 10% Niacinamide Serum Works for Pores and Oil Control
Niacinamide, also known as vitamin B3, is a water-soluble vitamin that offers multiple benefits for oily and congested skin. At a 10% concentration, OUAI B3 Nice 10% Niacinamide Serum helps regulate sebum production, which directly reduces the appearance of enlarged pores. By keeping oil in check, the serum prevents pores from becoming clogged and stretched, leading to a smoother, more refined texture over time.
Additionally, niacinamide strengthens the skin’s natural barrier, improves elasticity, and calms inflammation. This makes it an excellent choice for those who experience redness or breakouts alongside oiliness. With regular use, you’ll notice fewer blackheads, less shine, and a more even skin tone. The lightweight, fast-absorbing formula of OUAI B3 Nice 10% Niacinamide Serum makes it easy to incorporate into any skincare routine without feeling heavy or greasy.
- Regulates oil production to minimize shine and pore size.
- Strengthens the skin barrier to reduce sensitivity and irritation.
- Helps fade post-acne marks and even out skin tone.
Step-by-Step Guide: How to Use OUAI B3 Nice 10% Niacinamide Serum
To get the best results from OUAI B3 Nice 10% Niacinamide Serum, follow this simple routine: Start with a clean face. Use a gentle cleanser suited for your skin type, then pat dry. Apply the serum to your entire face (or just oily zones) after cleansing and before moisturizer. Dispense 2–3 drops onto your fingertips and press gently into the skin—avoid rubbing. Allow it to absorb for about 30 seconds before moving to the next step.
For daytime use, follow with a lightweight moisturizer and sunscreen (SPF 30+). At night, you can layer the serum under a richer moisturizer or treatment. If you’re new to niacinamide, start using it once daily (morning or evening) for the first week, then increase to twice daily if your skin tolerates it well. Consistency is key—use it daily for at least 4–6 weeks to see visible improvements in pore size and oil control.
- Use 2–3 drops for the whole face; a little goes a long way.
- Apply on damp skin for better absorption.
- Wait 30 seconds before layering other products.
Best Practices for Layering with Other OUAI Products
OUAI B3 Nice 10% Niacinamide Serum pairs well with most skincare ingredients, but proper layering ensures maximum efficacy. After cleansing, apply water-based treatments like toners or essences first. Then use the niacinamide serum. Follow with your moisturizer and sunscreen in the morning, or a night cream in the evening. For oily skin, you might skip a heavy moisturizer and opt for a gel-based one.
You can combine the serum with OUAI Saturn Sulfur Spot Treatment Mask for targeted acne control—apply the mask after the serum on breakout-prone areas. For hydration, follow with OUAI Deep Dive Hydration Set to lock in moisture without adding oiliness. Avoid using the serum at the same time as strong exfoliating acids (like AHAs/BHAs) or high-dose vitamin C; instead, use niacinamide in the AM and exfoliants in the PM, or alternate days.
- Layer: Cleanser → Toner → OUAI B3 Nice 10% Niacinamide Serum → Moisturizer → SPF (AM).
- Can be used with OUAI Saturn Sulfur Spot Treatment Mask for spot treatment.
- Avoid mixing with strong acids in the same routine to prevent irritation.
Common Mistakes to Avoid When Using Niacinamide Serum
Even a great serum can underperform if used incorrectly. One common mistake is applying too much product—more drops don’t mean better results. Stick to 2–3 drops; excess serum can pill or cause irritation. Another pitfall is layering niacinamide with incompatible ingredients like pure vitamin C (L-ascorbic acid) in the same routine. While some formulations are stable, it’s safer to separate them into AM/PM.
Also, don’t skip sunscreen. Niacinamide can make your skin more sensitive to the sun, and SPF is essential for protecting your skin and preventing further pore enlargement from sun damage. Finally, be patient: pore-minimizing and oil control take time. You won’t see dramatic changes overnight, but with consistent use of OUAI B3 Nice 10% Niacinamide Serum, your skin will become clearer, smoother, and less oily within a few weeks.
- Don’t over-apply—2–3 drops are enough.
- Avoid using with high-strength vitamin C in the same session.
- Always wear SPF during the day to protect your progress.
Ready to refine your pores and take control of oil? Add OUAI B3 Nice 10% Niacinamide Serum to your daily routine and experience the difference. For a complete oil-control regimen, pair it with OUAI Saturn Sulfur Spot Treatment Mask for targeted blemish care. Start your journey to balanced, radiant skin today.



