Mandelic Acid (AHA)
Salicylic Acid (BHA)
How to Layer These Actives in Your Routine
Salicylic Acid (BHA)
Apply first to clean, dry skin. Operates at pH 3–4.
Avoid layering in the same evening session.
Mandelic Acid (AHA)
Layer over the initial active. Operates at pH 3.5–4.2.
Biochemical Mechanism & Pharmacology
Both Mandelic Acid (AHA) and Salicylic Acid (BHA) belong to the Direct Acids & Exfoliants family and target identical cutaneous receptors and keratolytic pathways. Layering two separate formulas from this family multiplies barrier irritation and peeling without improving receptor saturation or therapeutic results.
Select one primary formulation from this active class per routine session. Never stack high-strength exfoliants or multiple retinoids.
Recommended 7-Day Routine Blueprint
| Morning (AM) Routine | Evening (Night A) | Evening (Night B) |
|---|---|---|
✓Gentle Cleanser ✓Hydrating Serum ✓Broad-Spectrum SPF 50+ | •Use either Mandelic Acid (AHA) OR Salicylic Acid (BHA) | •Rest Night: Barrier Creams & Ceramides |
Obstetric & Pregnancy Safety Summary
View Full Pregnancy Directory →Mandelic Acid (AHA) is classified as PERMITTED during pregnancy, while Salicylic Acid (BHA) is classified as CAUTION LOW DOSE under clinical guidelines. Always cross-reference with your physician if expecting.