That polished jar may be selling theater, not delivery. You can pay for weighty glass, perfume, and a velvet story, while the formula's active compounds stall at the stratum corneum, the skin's outer shield. It looks rich. Skin, however, judges a cream by transport, not status.The barrier is ruthlessly selective. Corneocytes embedded in lipid bilayers form a brick-and-mortar layer that blocks many...More