Spirulina is rich in amino acids, vitamins and minerals. It is a whole food that keeps your hunger down between meals. Also if you eat fruits and vegetables regularly it will not stop cancer from forming but it will retard the ones already formed. In most cases spirulina will not only retard cancer but eliminate it completely. It will also give you energy. If you have never heard of spirulina before, look it up on the internet.
EC: More information about Spirulina on Wikipedia.