DR.ALTHEA 15% Niacinamide Purity Serum is a high-performance treatment formulated to transform compromised skin barriers and address persistent congestion. This advanced serum harnesses niacinamide's proven ability to regulate sebaceous activity, diminish hyperpigmentation, and fortify the skin's protective matrix. The 30ml concentration delivers visible refinement in pore definition, skin smoothness, and luminosity while calming reactive skin conditions. **How to Use:** Apply 2-3 drops to cleansed, slightly damp skin each morning and evening. Gently press the serum into the face and neck using upward motions, allowing 30 seconds for absorption before layering moisturizer. For optimal results, follow with sunscreen during daytime routines. Begin with alternate-day application if introducing niacinamide to your regimen, gradually increasing frequency as skin acclimates. Compatible with most actives, though spacing application with vitamin C or exfoliating acids by several hours maximizes efficacy and minimizes potential irritation.