Chronically elevated levels of cortisol are also known to contribute to the breakdown of collagen, the most abundant protein in the human body, and elastin, the protein that forms in the connective tissues, explains Blair Murphy-Rose, M.D., a dermatologist at the Laser & Skin Surgery Center of New York. The result? Accelerating signs of skin aging like wrinkles and laxity. “Reducing stress levels will help to keep your skin healthier and more youthful,” she says. “While there are many factors contributing to the development of these skin conditions and to skin aging, like genetics, environmental exposures, lifestyle habits, etc., keeping physical and emotional stress under control can certainly help.”