Unhealthy lifestyle. Table with a pint of beer, crisps, a TV remote control, and an ashtray containing cigarettes. These items represent an unhealthy lifestyle. Excessive alcohol consumption can cause liver disease, heart disease, increased risk of cancer and may lead to addiction. Crisps are high in salt and saturated fat, which are associated with an increased risk of heart disease. A sedentary lifestyle, typified here by the remote control, leads to an increased risk of heart disease and some cancers. Smoking tobacco causes lung cancer and respiratory disease and increases the risk of heart disease.