A professional antioxidant serum tailored for oily and blemish‑prone skin, combining 15% pure vitamin C (L‑ascorbic acid), 0.5% ferulic acid, and 0.5% silymarin (milk thistle extract). This patented formula provides advanced environmental protection, reduces oil oxidation that can trigger breakouts, and improves clarity and radiance. The larger 55 ml professional size is ideal for clinic protocols and extended treatments.