Kojic Acid

Kojic acid is a brightening ingredient derived from a natural fermentation process. It helps visibly reduce the appearance of dark spots and uneven skin tone, supporting a brighter, more uniform-looking complexion.

• Before you start

  Patch test before you start, and give it a week rather than a night — a reaction to this one can take several days to show, so a single overnight test is not enough.

• Where it goes

  After cleansing, before moisturizer.

• Where to apply

  Across the face, or just on the areas you want to even out. It suits the backs of the hands too. Keep it away from the eye area.

• Sun

  Wear sunscreen daily. Kojic acid isn't one of the actives we flag for extra sun care - and sun exposure is what drives the look of the marks you're working on, so daily protection earns its place either way.

• Alongside others

  It sits comfortably alongside other brightening ingredients. Keep it to a different evening from exfoliating acids or a retinoid if your skin feels tight.

• What to expect

  Expect nothing dramatic in the first weeks. Most people have no settling-in period to push through, and no purge.

• A little tingle or warmth early on is common and usually passes.

• If it doesn't suit

  If redness or stinging sticks around, use it less often. Stop altogether if a red, itchy rash appears after weeks of comfortable use, and don't go back to it — that pattern is different from ordinary irritation.

Patch test before first use and keep checking the spot for a week — a reaction to this ingredient can take several days to show. Discontinue use if irritation occurs, and if a red, itchy rash appears after weeks of comfortable use, stop and don't return to it.

Six situations change whether Kojic Acid suits your skin right now. Each one is either a reason to skip it, a reason to go slowly, or nothing to watch for.

Recent Facial or Laser

Skip it

Prone to Redness

Skip it

Dry or Itchy Patches

Skip it

Maternity & Nursing

Go slowly

Fragile or Sensitive

Go slowly

Recent Shave or Wax

Go slowly

Maternity & Nursing — If you are pregnant or nursing, you may prefer to check with your healthcare provider before use.

Fragile or Sensitive — Use it less often — or stop — if it feels uncomfortable, and keep it off skin that’s broken, cut or sunburned.

Recent Shave or Wax — Avoid for 24 hours after waxing, threading, or dermaplaning.

Region	Most a cosmetic may contain
United States	No explicit cap
Canada	No explicit cap
European Union	1% (face and hand only)
Great Britain	1% (face and hand only)
India	No explicit cap
Brazil	No explicit cap
Japan	No explicit cap
South Korea	No explicit cap
Kenya	1% (face and hand only)
Namibia	No explicit cap
Ukraine	No explicit cap
Georgia	No explicit cap
Australia	No explicit cap
United Arab Emirates	1% (face and hand only)
Kuwait	1% (face and hand only)
Hong Kong	No explicit cap
Singapore	1% (face and hand); 0.2% (body) — guidance, not law
Brunei	No explicit cap
Jordan	No explicit cap
Trinidad & Tobago	No explicit cap

Where a figure appears, that is the maximum strength allowed or advised for kojic acid in that market — some are set in cosmetics regulation, others are the ceiling a cosmetic safety panel recommends. Where no figure appears, the market either sets no cosmetic maximum or handles this ingredient outside its cosmetic rules. These are limits, not targets — the right strength for a formula is the formulator's decision.

Open a market to see the rulebook its figure comes from. Those notes describe each market's own rules as we read them, current to August 24, 2026; the linked documents are the authority, and nothing here is legal advice.

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What is Kojic Acid?

A brightening ingredient from fungal fermentation that helps dark spots and uneven patches look lighter over time.

What else is Kojic Acid called?

On a label you may see Kojic and Kojic dipalmitate.

When should you apply Kojic Acid?

Evening.

How often can you use Kojic Acid?

Daily, all over the face, not the eye area.

Where do you apply Kojic Acid?

All over the face, not the eye area. Keep it off your lips too.

Can you use Kojic Acid around the eyes?

No. Kojic Acid goes all over the face, not the eye area.

Does Kojic Acid make skin more sensitive to the sun?

No. Kojic Acid is not flagged as increasing sun sensitivity.

What should you not use with Kojic Acid?

Space it apart from Copper peptides, Exfoliants, Eye-area retinol, Retinoids and Vitamin C.

Who should avoid Kojic Acid?

Skip it if any of these apply: Recent Facial or Laser, Prone to Redness and Dry or Itchy Patches. Go slowly with Maternity & Nursing, Fragile or Sensitive and Recent Shave or Wax.

Is there a cosmetic limit for Kojic Acid?

Only some regions set one. The maximum strength for Kojic Acid in a cosmetic is 1% (face and hand only) in the European Union and 1% (face and hand only) in Great Britain. No maximum is set in the United States and Canada. A cap is a limit on the rules, not a signal to use more.

Everything on this page traces to the sources listed below — regulators' own publications and published studies. Where the evidence does not answer a question, it is left unanswered.

Some sources below are the official product information for prescription medicines, cited for how they interact with this ingredient. We use them for their safety and handling detail only. A cosmetic product is not one of those medicines and is not intended to treat any condition.

Our review is AI-assisted and is not a named expert's opinion. Last reviewed August 5, 2026.

Think something here is out of date or wrong? Email us at wiki@skinintelligence.ai with your reasoning and where you read it. We read what people send, and we update the page when the sources support it.