Can I use Mandelic Acid and Salicylic Acid together?
Piel's routine check says: Caution
Two exfoliating acids in one routine is more exfoliation than most skin needs. Keep one, or alternate nights. This applies when applied at the same time.
This is a dose question rather than an interaction. Two exfoliating acids do not react with each other; they simply exfoliate twice, and skin has no way of telling that the second one came from a different bottle. A cleanser, a toner and a leave-on serum can each be carrying one, which is how a routine ends up at twice the exfoliation nobody planned.
Piel's exfoliating-acid family spans both the AHAs and the salicylic-acid side, so a glycolic toner and a salicylic cleanser count as two.
Keeping one, or alternating nights, gives the same result without the flaking and tightness that over-exfoliation brings. If skin already feels rough or tight, or stings when moisturiser goes on, pause both and let it settle first.
Mandelic Acid belongs to Piel's family of exfoliating acids; Salicylic Acid to exfoliating acids.
About Mandelic Acid
CosIng classes Mandelic Acid as:
- antimicrobial
The largest of the commonly used alpha-hydroxy acids, which is why it works more slowly and is often chosen for sensitive skin. It appears in products aimed at texture and tone, and it increases sun sensitivity while a routine includes it.
About Salicylic Acid
CosIng classes Salicylic Acid as:
- anti-seborrheic
- hair conditioning
- keratolytic
- fragrance
- preservative
- skin conditioning
A beta-hydroxy acid that is oil-soluble, so it can work inside pores rather than only on the surface. It is commonly used for breakouts and congestion.
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