Lactic Acid (AHA)
L-Ascorbic Acid (Pure Vitamin C)
How to Layer These Actives in Your Routine
L-Ascorbic Acid (Pure Vitamin C)
Apply first to clean, dry skin. Operates at pH 2.8–3.5.
Allows cutaneous acid mantle to equilibrate before the next step.
Lactic Acid (AHA)
Layer over the initial active. Operates at pH 3.4–4.
Biochemical Mechanism & Pharmacology
Lactic Acid (AHA) and L-Ascorbic Acid (Pure Vitamin C) 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 L-Ascorbic Acid (Pure Vitamin C) (pH 2.8–3.5, Viscosity Tier 2) first. Wait 1–2 minutes for absorption, then follow with Lactic Acid (AHA).
Recommended 7-Day Routine Blueprint
| Morning (AM) Routine | Evening (Night A) | Evening (Night B) |
|---|---|---|
✓Gentle Cleanser ✓L-Ascorbic Acid (Pure Vitamin C) ✓Broad-Spectrum SPF 50+ | •L-Ascorbic Acid (Pure Vitamin C) •Lactic Acid (AHA) •Barrier Cream | •L-Ascorbic Acid (Pure Vitamin C) •Lactic Acid (AHA) •Barrier Cream |
Obstetric & Pregnancy Safety Summary
View Full Pregnancy Directory →Lactic Acid (AHA) is classified as PERMITTED during pregnancy, while L-Ascorbic Acid (Pure Vitamin C) is classified as PERMITTED under clinical guidelines. Always cross-reference with your physician if expecting.