* Keep blood pressure and cholesterol under control

* Keep body-mass index under 25

* Do not take vitamin supplements without consulting a doctor

* Include fruits, vegetables, whole grain and high-fibre foods and fish in your diet. The intake of salt and fat should be minimal.

* Exercise for at least 30 minutes on all days. If you need to lose weight increase the time to 60 to 90 minutes.

* Do not ignore the warning signs even if you are in your 20s or 30s.