How to use them
Use them in the same routine morning or night. Apply PHA first, then Kojic Acid, moving from thinnest to thickest texture. Finish with sunscreen in the morning.
- 1CleanseGentle cleanser, pat dry
- 2PHA3% – 10%, wait about 1 minute
- 3Kojic Acid1% – 2%
- 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 PHA does
Polyhydroxy acids are the gentlest chemical exfoliants. They work only on the surface, hydrate at the same time, and are usually tolerated by sensitive and rosacea-prone skin.
- Typical strength
- 3% – 10%
- When
- AM/PM
- Irritation
- Best for
- Sensitive, Dry And Normal skin
Everything that pairs with PHA →
Frequently asked questions
Can I use Kojic Acid and PHA together?
Yes, it is safe. There is no known chemical conflict between Kojic Acid and PHA, and neither makes the other less effective.
Which goes first, Kojic Acid or PHA?
Apply PHA first, then Kojic Acid. 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 PHA in the morning or at night?
PHA: works morning or night. You can use it daily. It is a good first acid, or a way to keep exfoliating on retinoid "rest" nights if your skin tolerates it.
Is Kojic Acid with PHA safe during pregnancy?
Neither is a known risk in normal cosmetic amounts, but guidance varies for Kojic Acid. Check with your doctor.