After fifty, mortality is mainly caused by :

1. Cardiovascular diseases.

2. Senility.

3. Cancers.

These diseases are characterized by cellular deterioration.

Deterioration of arteries and the heart muscle,

Deterioration of the cerebral nervous fibres,

Deterioration of immunity cells encouraging cancers.

Deregulation of sugar, fat and proteins' metabolisms have a devastating effect on the org

Death generally occurs after a 20 year period of deterioration. The consequences of deteriorating illnesses provoke recurrent disability.