The Guerniss Raw Glutathione + Niacinamide + Ceramide Serum (30ml) is arguably the most versatile "all-rounder" in the Raw series. If the Hyaluronic Acid serum you asked about previously is for hydration, this one is for texture, tone, and oil balance.
Think of this as your "Skin Filter" serum—it works to make your pores look smaller, your skin tone more even, and your natural barrier stronger.
The "Power Trio" Ingredients
Glutathione: The master antioxidant. It prevents oxidative stress and gently brightens the skin by inhibiting excess melanin production.
Niacinamide (Vitamin B3): A superstar ingredient that regulates oil (sebum), minimizes the appearance of enlarged pores, and calms redness/inflammation.
Ceramides: Crucial lipids that repair the skin's moisture barrier, ensuring that while the Niacinamide works on your pores, your skin stays protected and resilient.
Main Benefits
Pore Refinement: Niacinamide is world-famous for helping stretched-out pores "snap back" and look less noticeable.
Oil & Shine Control: Helps balance greasy T-zones without stripping the skin of necessary moisture.
Brightening & Anti-Redness: Glutathione tackles dullness while Niacinamide reduces the blotchy redness often caused by acne or irritation.
Barrier Support: Ceramides ensure your skin doesn't become "sensitized" or dry from environmental pollutants.
How to Integrate This into Your Routine
When to Use: Can be used both Morning (AM) and Night (PM).
Layering with Acids: This pairs beautifully with the Salicylic Acid 0.5% you mentioned earlier. The Salicylic Acid cleans the pores, and this Niacinamide serum helps keep them clear and refined.
Application: Apply 2–3 drops after cleansing (and after any exfoliating acids, if using them).
The "Glow" Combo: If you use this in the morning and the Glutathione Alpha Arbutin at night, you’ll see a significant improvement in skin clarity within a few weeks.