Numbuzin No.5 Vitamin Concentrated Serum is designed to brighten dull skin and fade dark spots using glutathione, niacinamide, and Vitamin C. Apply 2–3 drops (or 3-5 drops) to clean, toned skin, massaging gently and patting to enhance absorption. It is suitable for morning and night, and must be followed by moisturizer and SPF.

Routine: Use daily, both morning and night, after cleansing and toner.
Application: Apply a moderate amount (3-5 drops) over the entire face. For targeted results, add extra drops to areas with acne scars or dark spots.
Layering: For enhanced effects, pair with the Numbuzin No.5+ Concentrated Pad.
Protection: Always apply sunscreen (SPF) after morning application.
Precautions:
Avoid using with high-concentration vitamin C, retinol, or exfoliating acids (AHA/BHA) to prevent irritation.
Due to the vitamin ingredients, it is recommended to store it in a cool, dark place to avoid oxidation.
If irritation occurs, stop using it immediately.