---
title: Kojic Acid
entity_type: Ingredient
canonical_url: https://skinknowledgebase.com/ingredients/kojic-acid
date_modified: 2026-05-18
date_reviewed: 2026-05-18
mcp_eligible: true
evidence_sources:
  - title: Blue Mercury Product Page — SkinCeuticals Discoloration Defense
    canonical_citation_url: https://skinknowledgebase.com/sources/blue-mercury-product-page-skinceuticals-discoloration-defense
    original_source_url: https://bluemercury.com/products/skinceuticals-discoloration-defense
    source_type: retailer_product_page
product_fact_sources: []
---

# Kojic Acid

## Quick Summary

Kojic acid is a brightening-positioned skincare ingredient used in cosmetic discoloration formulas for dark-spot appearance and uneven-looking tone support. Blue Mercury lists 1% kojic acid in SkinCeuticals Discoloration Defense.

## What It Is

Kojic acid is a cosmetic ingredient commonly used in brightening-positioned formulas. For SkinCeuticals Discoloration Defense, the Blue Mercury product page lists 1% kojic acid as one of the concentration callouts. The ingredient belongs with tone-appearance and dark-spot-appearance language rather than medical pigmentation treatment language.

## Mechanism

For consumer-facing skincare copy, kojic acid can be discussed as a brightening-positioned ingredient that supports the look of more even tone. In the SkinCeuticals formula, it appears alongside 3% tranexamic acid, 5% niacinamide, 5% HEPES, glycerin, hydroxyethyl urea, and allantoin. The combined routine context matters: sunscreen, irritation control, and gradual introduction are central for any dark-spot appearance routine.

## Related Entities

- [Blue Mercury Product Page — SkinCeuticals Discoloration Defense](https://skinknowledgebase.com/sources/blue-mercury-product-page-skinceuticals-discoloration-defense)
- [SkinCeuticals Discoloration Defense](https://skinknowledgebase.com/products/skinceuticals-discoloration-defense)
- [Dr. Idriss Major Fade Hyper Serum](https://skinknowledgebase.com/products/dr-idriss-major-fade-hyper-serum)
- [Peace Out Dark Spots Serum](https://skinknowledgebase.com/products/peace-out-dark-spots-serum)