Both genetics and lifestyle affect your risk profile. Being overweight, eating poorly, failing to exercise, smoking, driving unsafely, and not wearing a seatbelt will increase your insurance premiums. On the other hand, making healthier lifestyle decisions can help to reduce your insurance premiums.
While you have no control over your genetics, you do have control over how you live your life. Educate yourself on how making healthy choices can not only improve your general health and wellness, but can also have a direct impact on your health care costs.