No.5 Vitamin Concentrated Serum - Numbuzin - No.5

Use the serum twice daily, in the morning and evening, for best results.

Yes, but introduce new products gradually. Apply serum after cleansing and toning.

This serum is suitable for most skin types, but a patch test is recommended, especially for sensitive skin.

Results can vary, but many users see improvements in skin brightness and reduced dark spots within a few weeks of consistent use.

Store in a cool, dry place away from direct sunlight.

Discontinue use immediately and consult a dermatologist if irritation persists.

The product information does not specify if the serum is tested on animals.

Discontinue use and consult a dermatologist.

Ensure skin is properly cleansed and toned before application. Use a smaller amount.