One of my sons-in-law spent the weekend in the hospital, bleeding from...er...the southern exposure. I know--ick!--but it's relevant to the topic.
Ulcers, Irritable Bowel Syndrome and other gastro-intestinal disturbances can be fatal, and they can be created, exacerbated or relieved by diet. What a murder weapon--a deadly diet that would go totally unnoticed in today's America!
My dear friend Jeannine, one of the Southern Indiana Writers, wrote a story for our NOVEL INGREDIENTS anthology (every story had a recipe with it) in which a man was due to be killed by the love of his wife, who made him all his favorite foods--all fattening, high in cholesterol and massive in quantity.
You are what you eat, so make sure what you eat is healthy, yes?
Off my soapbox. ;)