Niacinamide (Vitamin B3)
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.
Allows cutaneous acid mantle to equilibrate before the next step.
Niacinamide (Vitamin B3)
Layer over the initial active. Operates at pH 5–6.5.
Biochemical Mechanism & Pharmacology
Niacinamide (Vitamin B3) and Salicylic Acid (BHA) 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 Salicylic Acid (BHA) (pH 3–4, Viscosity Tier 1) first. Allow 10 minutes for cutaneous pH equilibration before applying Niacinamide (Vitamin B3) (pH 5–6.5, Viscosity Tier 2).
Recommended 7-Day Routine Blueprint
| Morning (AM) Routine | Evening (Night A) | Evening (Night B) |
|---|---|---|
✓Gentle Cleanser ✓Salicylic Acid (BHA) ✓Broad-Spectrum SPF 50+ | •Salicylic Acid (BHA) •Niacinamide (Vitamin B3) •Barrier Cream | •Salicylic Acid (BHA) •Niacinamide (Vitamin B3) •Barrier Cream |
Obstetric & Pregnancy Safety Summary
View Full Pregnancy Directory →Niacinamide (Vitamin B3) 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.