Factors which influence an individual's health?

Answer:
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 factors, and it is quite easy to get to know them, by filling out a 'life expectancy calculator'. There are several of those on the internet (Google it!).
First answer by ID1318220428. Last edit by Ron okay. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 3 [recommend question].