Sunlight or ultraviolet light exposure accelerates collagen degradation which significantly reduces the benefits of laser skin resurfacing which attempts to form new collagen under the skin.
One should be committed to minimize all factors contributing to skin aging, such as sunlight exposure and smoking, to maximize the benefits of laser skin resurfacing.
In addition, the daily use of sunscreen and proven anti-aging creams such as tretinoin will help enhance and maintain the benefits of laser skin resurfacing.