How to use them
Use them in the same routine morning or night. Apply PHA first, then Tea Tree Oil, moving from thinnest to thickest texture. Finish with sunscreen in the morning.
- 1CleanseGentle cleanser, pat dry
- 2PHA3% – 10%, wait about 1 minute
- 3Tea Tree Oil5% (diluted)
- 4Moisturiserseal everything in
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 →
What Tea Tree Oil does
An essential oil with modest evidence against mild acne. It works more slowly than benzoyl peroxide but causes less dryness. Undiluted it can irritate or sensitise skin, so it belongs in a formulated product.
- Typical strength
- 5% (diluted)
- When
- AM/PM
- Irritation
- Best for
- Oily And Combination skin
Everything that pairs with Tea Tree Oil →
Frequently asked questions
Can I use PHA and Tea Tree Oil together?
Yes, it is safe. There is no known chemical conflict between PHA and Tea Tree Oil, and neither makes the other less effective.
Which goes first, PHA or Tea Tree Oil?
Apply PHA first, then Tea Tree Oil. The general rule is thinnest to thickest texture, and lowest pH first.
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.
Should I use Tea Tree Oil in the morning or at night?
Tea Tree Oil: works morning or night. Use a product with around 5% tea tree, or dilute it. Never apply the pure oil straight to the face. Patch test first.
Is PHA with Tea Tree Oil safe during pregnancy?
Neither is a known risk in normal cosmetic amounts, but guidance varies for Tea Tree Oil. Check with your doctor.