How to use them
Use them in the same routine morning or night. Apply Kojic Acid first, then Zinc PCA, moving from thinnest to thickest texture. Finish with sunscreen in the morning.
- 1CleanseGentle cleanser, pat dry
- 2Kojic Acid1% – 2%, wait about 1 minute
- 3Zinc PCA1%
- 4Moisturiserseal everything in
What Kojic Acid does
Derived from fungi used in rice wine and soy sauce production, kojic acid blocks the enzyme that makes melanin. It is effective on dark spots but can cause contact sensitivity in some people.
- Typical strength
- 1% – 2%
- When
- AM/PM
- Irritation
- Best for
- Normal, Oily And Combination skin
Everything that pairs with Kojic Acid →
What Zinc PCA does
Zinc salts help regulate sebum and have mild anti-inflammatory and antibacterial effects. That is why zinc so often appears next to niacinamide in oil-control serums.
- Typical strength
- 1%
- When
- AM/PM
- Irritation
- Best for
- Oily And Combination skin
Everything that pairs with Zinc PCA →
Frequently asked questions
Can I use Kojic Acid and Zinc PCA together?
Yes, it is safe. There is no known chemical conflict between Kojic Acid and Zinc PCA, and neither makes the other less effective.
Which goes first, Kojic Acid or Zinc PCA?
Apply Kojic Acid first, then Zinc PCA. The general rule is thinnest to thickest texture, and lowest pH first.
Should I use Kojic Acid in the morning or at night?
Kojic Acid: works morning or night. Patch test first. Use once daily at first, then build up.
Should I use Zinc PCA in the morning or at night?
Zinc PCA: works morning or night. Use once or twice daily. It works best as part of a niacinamide or oil-control serum.
Is Kojic Acid with Zinc PCA safe during pregnancy?
Neither is a known risk in normal cosmetic amounts, but guidance varies for Kojic Acid. Check with your doctor.