Back in the day, those with money had plates made of pewter. Food with high acid content caused some of it to leach onto the food, causing lead poisoning death.
This happened most often with tomatoes, so for the next 400 years or so, tomatoes were considered poisonous.
Bread was divided according to status. Workers got the burnt bottom of the loaf, the family got the middle and the guests got the top, or “Upper Crust.”