Our skin, the body's largest organ, is under constant stress. The elements take their toll. Even overzealous washing or neglect is an assault. But there is nothing more damaging than the sunlight so many people think of as essential to good times and good health. "We think that about 90% of the ageing of the skin is sun damage and only 10% is actual ageing," says dermatologist Dr. Eileen Murray, an adjunct professor at the University of Brit-ish Columbia. "Look at the huge difference between the upper and lower sides of the arm, for instance.

Full story: vancouversun.com