What should you know about Yumi kojic acid?

Kojic acid is used in topical products to reduce tyrosinase activity, an enzyme involved in melanin production. That mechanism can make existing dark marks look less noticeable over time, but it does not identify why pigmentation developed or prevent every new mark. Acne, inflammation, hormones, medication and sun exposure can all contribute to uneven tone.

Irritation is possible, particularly when kojic acid is combined with several exfoliants or applied to a weakened skin barrier. More product does not make the process safer or necessarily faster.

Patch-test first and apply a thin layer to the affected area as directed. Start slowly, moisturise regularly and use broad-spectrum sunscreen each morning. Avoid eyes, lips and broken skin, and introduce other brightening or exfoliating products separately.

If the mark is new, changing or unexplained, have it assessed before treating it cosmetically. A dermatologist can suggest a structured skin-brightening treatment when a cream alone is unsuitable.

Stop use for persistent burning, swelling, blistering, hives or worsening darkening. Seek assessment for a spot that changes shape or colour, bleeds, crusts, becomes painful or fails to behave like your other pigmentation.

Ask what caused the pigmentation, whether kojic acid fits your skin, which ingredients to avoid together and how to manage irritation or recurrence.