Azelaic Acid (10%–15%)
Lactic Acid (AHA)
How to Layer These Actives in Your Routine
Lactic Acid (AHA)
Apply first to clean, dry skin. Operates at pH 3.4–4.
Allows cutaneous acid mantle to equilibrate before the next step.
Azelaic Acid (10%–15%)
Layer over the initial active. Operates at pH 4–5.5.
Biochemical Mechanism & Pharmacology
Azelaic Acid (10%–15%) and Lactic Acid (AHA) operate via distinct physiological mechanisms without reactive cross-oxidation or competing receptor antagonisms. They can be safely integrated into the same routine when sequenced properly from thinnest to thickest consistency.
Apply Lactic Acid (AHA) (pH 3.4–4, Viscosity Tier 2) first. Wait 1–2 minutes for absorption, then follow with Azelaic Acid (10%–15%).
Recommended 7-Day Routine Blueprint
| Morning (AM) Routine | Evening (Night A) | Evening (Night B) |
|---|---|---|
✓Gentle Cleanser ✓Lactic Acid (AHA) ✓Broad-Spectrum SPF 50+ | •Lactic Acid (AHA) •Azelaic Acid (10%–15%) •Barrier Cream | •Lactic Acid (AHA) •Azelaic Acid (10%–15%) •Barrier Cream |
Obstetric & Pregnancy Safety Summary
View Full Pregnancy Directory →Azelaic Acid (10%–15%) is classified as PERMITTED during pregnancy, while Lactic Acid (AHA) is classified as PERMITTED under clinical guidelines. Always cross-reference with your physician if expecting.