Kojie San products are primarily used to help brighten skin tone and reduce the appearance of hyperpigmentation, dark spots, and uneven skin tone. The active ingredient, kojic acid, inhibits melanin production, leading to a more radiant complexion.

Kojie San is not technically a bleaching product, but it does contain kojic acid, which can lighten the appearance of skin. It inhibits melanin production, leading to a gradual brightening effect rather than harsh bleaching.

Daily use of Kojie San on the face is generally not recommended due to the potency of kojic acid. Start by using it 2-3 times a week and gradually increase frequency as tolerated, always followed by a moisturizer and sunscreen.

It is best to consult with a doctor or dermatologist before using kojic acid soap, like Kojie San, during pregnancy or breastfeeding. While topical absorption is limited, potential risks should be discussed with a healthcare professional.