Certain lifestyle choices can adversely affect the appearance and function of a smile. One lifestyle choice that can affect the appearance of teeth is smoking. According to Healthline, the nicotine and tar in cigarettes can cause teeth to become yellowed and stained. Additionally, people who smoke are also at higher risk of gum disease, further damaging teeth. People should also avoid eating and drinking sugary foods and beverages. The sugar feeds the bacteria, which produce acid that can also damage teeth, causing cavities to form or erosion to occur. Fortunately, a smile makeover can give people a fresh start and a new smile. It is important for people who receive a smile makeover to change their lifestyle and make healthy choices to maintain a healthy, beautiful smile.