Ferulic Acid
Retinol
How to Layer These Actives in Your Routine
Ferulic Acid
Apply first to clean, dry skin. Operates at pH 3–4.
Allows cutaneous acid mantle to equilibrate before the next step.
Retinol
Layer over the initial active. Operates at pH 5.5–6.5.
Biochemical Mechanism & Pharmacology
Ferulic Acid and Retinol 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 Ferulic Acid (pH 3–4, Viscosity Tier 2) first. Allow 10 minutes for cutaneous pH equilibration before applying Retinol (pH 5.5–6.5, Viscosity Tier 2).
Recommended 7-Day Routine Blueprint
| Morning (AM) Routine | Evening (Night A) | Evening (Night B) |
|---|---|---|
✓Gentle Cleanser ✓Ferulic Acid ✓Broad-Spectrum SPF 50+ | •Ferulic Acid •Retinol •Barrier Cream | •Ferulic Acid •Retinol •Barrier Cream |
Obstetric & Pregnancy Safety Summary
View Full Pregnancy Directory →Ferulic Acid is classified as PERMITTED during pregnancy, while Retinol is classified as DEFER IN PREGNANCY under clinical guidelines. Always cross-reference with your physician if expecting.