Can you use lactic acid with mandelic acid?
Pick one per routine. Layering two separate AHAs (lactic acid and mandelic acid) over-exfoliates for most skin types.
Why
Both lactic acid and mandelic acid dissolve corneodesmosomes (the bonds between dead skin cells). Stacking them in one routine doubles the exfoliation load on the same recovery cycle.
How to layer them
Use one or the other per evening. If you want the benefits of both, alternate nights — lactic acid Mon/Wed/Fri, mandelic acid Tue/Thu/Sat, Sunday off. Combined-acid products (Paula's Choice 25% AHA + 2% BHA peel) handle this safely because the formulator balances pH.
Products that contain both lactic acid and mandelic acid
These products formulate both ingredients together — the chemistry is balanced for you.
Frequently asked questions
Can you use lactic acid with mandelic acid?
Pick one per routine. Layering two separate AHAs (lactic acid and mandelic acid) over-exfoliates for most skin types.
What happens if you mix lactic acid and mandelic acid?
Both lactic acid and mandelic acid dissolve corneodesmosomes (the bonds between dead skin cells). Stacking them in one routine doubles the exfoliation load on the same recovery cycle.
How should you layer lactic acid and mandelic acid?
Use one or the other per evening. If you want the benefits of both, alternate nights — lactic acid Mon/Wed/Fri, mandelic acid Tue/Thu/Sat, Sunday off. Combined-acid products (Paula's Choice 25% AHA + 2% BHA peel) handle this safely because the formulator balances pH.