The amount of sleep you get each night can have an effect on the appearance of your skin. While everyone is different, most people require seven to eight hours of sleep per night. Not getting enough sleep affects the appearance of the skin. This is seen commonly as puffiness under the eyes because the blood vessels around the eyes open up and bring fluid into that area. Additionally, when you do not get enough sleep your body releases the stress hormone cortisol. Cortisol leads to breakdown of collagen in the skin, the protein that gives the skin its tightness. Over time, this leads to fine lines, wrinkles, and laxity. At the same time, when you get enough sleep your body produces an adequate amount of human growth hormone, which thickens the skin. A recent study by Estee Lauder demonstrated scientifically that inadequate sleep speeds up skin aging. Specifically, poor sleep correlates with increased amounts of fine lines, wrinkles, laxity, and discoloration. So before starting a new skin care regimen or doing treatments, be sure that you are treating your body and skin right by getting enough sleep, eating a healthy diet, getting regular exercise, protecting yourself from the sun by applying sunscreen daily, and avoiding bad habits such as smoking and drinking alcohol.