Molecular Weight vs Skin Penetration Depth Chart

A clean scientific diagram comparing molecular weight and skin penetration depth. A horizontal axis showing molecular weight in Daltons (small to large), with example molecules plotted: Glycolic acid (76 Da, deep), Salicylic acid (138 Da, mid), Retinol (286 Da, mid-shallow), Hyaluronic acid (1,000,000+ Da, surface only). Simple bar or dot chart style, flat minimal illustration, clean white or light beige background, labelled axes and molecules. Scientific infographic style, no photography.

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