About Garnier SkinActive 4% AHA + BHA & Niacinamide Charcoal Face Serum 30mlIntroducing charcoal serum for blemish-prone skin. Also suitable for acne-prone skin. Formulated with 4% [AHA + BHA + Niacinamide].The serum visibly reduces blemishes, improves the appearance of residual marks, and helps..