# Glycolic Acid 7% (AHA) vs. Salicylic Acid 2% (BHA): Molecular Weight & Barrier Load

> Comparing water-soluble Glycolic Acid (76.05 Da, pKa 3.83) against lipid-soluble Salicylic Acid (138.12 Da, pKa 2.97) for corneocyte desquamation vs. sebaceous pore clearing.

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