HP Cell Regation Skin Booster Serum I is a dermal mesotherapy solution by BR Pharm (South Korea) formulated with 0.5% PDRN (polydeoxyribonucleotide) in a 3 mL vial × 5 per box. It is created to gently regenerate the skin, improve elasticity, and enhance moisture with minimal irritation. The formula supports skin barrier nutrition, smooths texture, and reduces inflammation. Serum I is ideal for users with early signs of aging or those seeking a lighter booster treatment.