Lifestyle related illnesses are diseases or sufferings which are caused by an unhealthy lifestyle. What we mean with lifestyle is how you live, and it depends on your relation to food, nicotine, alcohol, and physical activity. Your lifestyle also depends on circadian rhythm and enough sleep and stress control. Diseases which statistically are hereditary are rarely called lifestyle related illnesses. However, in this text we will focus on lifestyle related illnesses caused by unhealthy eating habits and little physical activity.
Even though these diseases are not hereditary, a lifestyle can be. If parents have bad eating habits, the child will probably inherit the bad eating habits itself and live with those habits all its life. Lifestyle also depend a lot of what environment you live in.