Kojic Acid
Kojic Acid — a compound produced by certain fungi, often during the fermentation of foods like rice, that helps lighten hyperpigmentation. It works primarily by inhibiting tyrosinase, the enzyme responsible for melanin formation, and is a long-standing ingredient in brightening formulations.
Key points
- Kojic acid is a natural byproduct of fungal fermentation, notably associated with rice and sake production.
- It brightens skin by chelating copper needed by tyrosinase, thereby slowing melanin production.
- It is used to address sun spots, melasma, age spots, and post-inflammatory hyperpigmentation.
- Kojic acid can be sensitizing for some users and is often stabilized or blended with other brighteners.
Frequently asked
What is kojic acid used for in skincare?
It is primarily used to lighten dark spots and even skin tone by reducing melanin production. Common targets include sun spots, melasma, and marks left behind by breakouts.
Can kojic acid irritate the skin?
Some people experience redness or sensitivity, particularly at higher concentrations, so patch testing is wise. Using it with sunscreen and introducing it gradually can help minimize irritation.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
