How to use them
Use them in the same routine morning or night. Apply PHA first, then Sulfur, moving from thinnest to thickest texture. Finish with sunscreen in the morning.
- 1CleanseGentle cleanser, pat dry
- 2PHA3% – 10%, wait about 1 minute
- 3Sulfur3% – 10%
- 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 Sulfur does
An old-school acne fighter that dries out oily spots, gently exfoliates and has antibacterial and antifungal activity. It is gentler than benzoyl peroxide for many people, though it has a distinctive smell.
- Typical strength
- 3% – 10%
- When
- AM/PM
- Irritation
- Best for
- Oily, Combination And Sensitive skin
Everything that pairs with Sulfur →
Frequently asked questions
Can I use PHA and Sulfur together?
Yes, it is safe. There is no known chemical conflict between PHA and Sulfur, and neither makes the other less effective.
Which goes first, PHA or Sulfur?
Apply PHA first, then Sulfur. 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 Sulfur in the morning or at night?
Sulfur: works morning or night. Use as a spot treatment, a clay mask or a short-contact wash. It can be drying, so moisturise afterwards.
Is PHA with Sulfur safe during pregnancy?
Neither is a known risk in normal cosmetic amounts, but guidance varies for Sulfur. Check with your doctor.