Overview

• The study led by skin scientist Guy K. German at Binghamton University was published in the Journal of the Mechanical Behavior of Biomedical Materials.
• Lab tests comparing pure water and salt water treatments found that saline exposure raises mechanical drying stress, resulting in greater tissue stiffness and perceived tightness.
• Salt ions disrupt the natural moisture equilibrium and elasticity of the outermost skin layer by drawing water out during evaporation.
• Rinsing off with fresh water after ocean swims dissolves leftover salt, alleviates drying stress and helps restore skin pliability.
• These findings offer a scientific basis for developing post-swim moisturizers and strengthening dermatological advice on managing skin hydration.