Recent biochemical research into the metabolism of the essential fatty acids seems to have uncovered a major underlying cause of breast, prostate, and colorectal cancers. This biochemistry tells us that this cause is the modern American diet and that simple dietary change is capable of preventing these cancers.
Finding the cause of a disease and then removing that cause is called primary disease prevention; the disease never occurs and wellness is continuously maintained. In recent years, this definition has been changed to mean preventive medical care, namely early diagnosis and treatment. This new type of prevention utilizes regular medical checkups aimed at early diagnosis. Thus, when a disease reaches the point where it can be diagnosed, the disease is managed by regular doctor visits, prescription drugs, and surgery. This is not primary prevention.