In my opinion cancer is spread as most deadly disease in the world but in reality it is curable.
No disease can flourish in alkaline environment so if body medium is made alkaline no disease can flourish not even the cancer. First step is to cut all sugar intake in food through this cancer cell will die their natural death. sugar is avoided in all possible form.
There are some easy prevention all way to keep disease away like drinking hot lemon water in morning , the warm citric acid is found to be more effective then chemotherapy.
It only prevent the tumor to become cancerous but only stop the cancer cell growths.
So it is pre and post effective bit as we all know prevention is better than cure.