What is the reasoning behind that? Did someone die by doing too many liver flushes?

Dr. Sutter on the Ask Dr. Sutter forums claims that he had liver cancer and treated himself by doing coke-lemon-olive oil Liver Flushes every night. He says that he survived.

The oldest woman in the world, Mariam Amash, says that she attributes her longevity to drinking a cup of olive oil a day. She does daily liver flushes! If some old lady can drink one cup of oil a day, and live to be the oldest person on earth, what make you think that it's so dangerous to drink half a cup twice a week?