Best Serum for Stressed Skin Barrier in Cold Weather (USA Guide) Cold weather is one of the most damaging environmental stressors for your skin barrier — especially in dry U.S. climates like California, Nevada, Utah, and Arizona. Low humidity, wind, indoor heating, and pollution all combine to strip moisture, weaken your skin barrier, and trigger … Continue reading Best Serum for Stressed Skin Barrier in Cold Weather (USA Guide)