La Roche-Posay Retinol B3 純視黃醇精華，結合視黃醇、維他命B3煙酰胺及甘油，針對細紋、皺紋、膚質不平滑及膚色不均的外觀，幫助肌膚呈現更柔滑、透亮的狀態。品牌英國官方資料將其標示為0.3% Retinol B3精華，並介紹配方結合純視黃醇及漸進釋放型維他命A成分，兼顧護理效果及肌膚耐受性；煙酰胺與甘油則配合保濕護理，幫助維持柔軟舒適感。品牌將其定位為敏感肌亦可考慮的抗老精華，但不代表完全不會引起乾燥或刺激。僅於晚間使用，潔面後取約3至4滴塗於面部及頸部，避開眼周，再使用保濕產品。初期可參考英國官方建議，每星期使用1至2次，再按肌膚耐受程度逐步調整；日間應使用廣譜防曬。30ml裝。孕期及哺乳期按品牌建議避免使用。包裝版本可能不同，實際成分、容量及使用指示以所購產品標示為準。

La Roche-Posay Retinol B3 Serum combines retinol, vitamin B3 (niacinamide) and glycerin to address the appearance of fine lines, wrinkles, uneven texture and uneven skin tone for a smoother, more radiant-looking complexion. Official UK information describes it as a 0.3% Retinol B3 serum and highlights a combination of pure retinol and gradual-release vitamin A ingredients to balance efficacy with skin tolerance. Niacinamide and glycerin provide moisturizing support for a softer, more comfortable skin feel. The brand positions it as suitable for sensitive skin, but this does not mean it cannot cause dryness or irritation. Use in the evening only, applying approximately 3–4 drops to the face and neck after cleansing, avoiding the eye area, then follow with moisturizer. The official UK page recommends starting once or twice weekly and increasing gradually according to skin tolerance. Use broad-spectrum sunscreen during the day. 30ml. Following the brand's advice, avoid use during pregnancy and breastfeeding. Packaging versions may vary; refer to the purchased product for its specific ingredients, capacity and directions.