Across Greater London, Southern England, and the East Midlands, tap water contains over 200 mg/L of dissolved calcium carbonate and magnesium ions. When rinsing with high-pH tap water, these mineral salts react with natural fatty acids, forming an insoluble film that blocks natural lipid synthesis and triggers micro-inflammation. Beauty Green Tea formulations supply organic acids to restore skin's physiological pH 5.5, preventing persistent tightness.
Furthermore, during British autumn and winter months, alternating between chilly outdoor dampness and dry indoor radiator heating causes rapid trans-epidermal water loss (TEWL). Green tea catechins, specifically epigallocatechin-3-gallate (EGCG), act as free-radical scavengers while plant ceramides prevent cold-wind chapping without clogging pores or feeling greasy under makeup.