Salicylic Acid (BHA)
Squalane (Biocompatible Hydrocarbon)
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.
Squalane (Biocompatible Hydrocarbon)
Layer over the initial active. Operates at pH 5.5–7.
Biochemical Mechanism & Pharmacology
Squalane (Biocompatible Hydrocarbon) provides vital physiological lipids and humectants that reinforce the stratum corneum lipid matrix, preventing trans-epidermal water loss (TEWL) and buffering against irritation from Salicylic Acid (BHA) without attenuating its therapeutic cellular benefits.
Apply the lower viscosity product first, or buffer by applying Squalane (Biocompatible Hydrocarbon) prior to Salicylic Acid (BHA) for sensitive skin (the sandwich method).
Recommended 7-Day Routine Blueprint
| Morning (AM) Routine | Evening (Night A) | Evening (Night B) |
|---|---|---|
✓Gentle Cleanser ✓Squalane (Biocompatible Hydrocarbon) ✓Broad-Spectrum SPF 50+ | •Salicylic Acid (BHA) •Squalane (Biocompatible Hydrocarbon) •Barrier Seal | •Salicylic Acid (BHA) •Squalane (Biocompatible Hydrocarbon) •Barrier Seal |
Obstetric & Pregnancy Safety Summary
View Full Pregnancy Directory →Salicylic Acid (BHA) is classified as CAUTION LOW DOSE during pregnancy, while Squalane (Biocompatible Hydrocarbon) is classified as PERMITTED under clinical guidelines. Always cross-reference with your physician if expecting.