Sofina iP Brightening Serum Refill against spots and [Quasi-drug] [Countermeasures freckles]

A preventive stain-fighting serum that suppresses melanin production and prevents spots and freckles (quasi-drug) [Recommended for such people] I want to take measures before they become visible stains. I don't want to get more stains and make them stand out. I am concerned about dullness and lack of transparency due to dryness.