Factors Within Your Control
having a support structure of people you can count on for advice, help, etc.
knowing where to go for health care advice
eating a balanced diet
engaging (or not) in physical activity
using proper safety equipment such as helmets
abstaining (or not) from drugs and alcohol
Factors Outside Your Control
heredity of a certain disease
heredity of a certain body type
abusive or loving environment at home
family habits
mental disorder related to brain chemistry
safety and cleanliness of environment