Another anecdote: My grandma lived to 98, and only couldn't get around so well and lost mental sharpness around 96. She grew up on "southern" cooking, complete with lard at almost every meal. She refused to eat anything green. Most of her diet in her later years, when she just didn't feel like cooking any more, was KFC chicken, Papa John's wings, and Domino's pizza, and always a sugary dessert. Her joke was the grease kept her lubed. She never went to the doctor for checkups, and the only time she set foot in a hospital was when she had a cancer on her neck in her late 80's. The doctors asked what she did to stay so healthy for so long, and she said, "I just keep breathing". She died of nothing more than old age. I hope I got most of her genes.