Cancer is the second leading cause of death. Mice given this chemical develop cancers, such as bone tumors, cancer of the blood, cancer of the stomach, etc. Research has shown that infant mice fed by a female mouse having breast cancer will also develop cancer. When human cancer cells were injected into animals, the animals also developed cancer. If the meat which we eat daily comes from animals that originally have such disorders, and we take them into our body, there is a good chance we will also get the diseases.
Most people assume that meat is clean and safe, that there are inspections done at all butcheries.
There are far too many cattle, pigs, poultry, etc. killed for sale every day for each one to actually be examined. It's very difficult to check whether a piece of meat has cancer in it, let alone check every single animal. Currently, the meat industry just cuts off the head when it has a problem, or cuts off the leg which is diseased. Only the bad parts are removed and the rest is sold. There is yet another concern.