There are many, many thing that influence your health. Some common ones (some a person can control, others a person cannot) are....*Diet / Nutrition*BMI (Body Mass Index)*Exercise Habits*Muscle...
1 the amount you eat
2 the amount you smoke
3 the exercise you get
These issue you can influence. Heriditary disorders and infections are less easy to influence.
To me the five factors that influence your health are genetics, environment, motivation, knowledge First one can't control one's genetics. However one can work around it. For example Gardner syndrome...
Lifestyle (Exercise, Smoking, Drugs etc.) Diet (5 A Day, Right Food Groups) Environment (Pollution, Clean Water, Clean Air) And Genes (Diseases/Problems Through Genetics) Addition: There are dozens...