do u know about the great bread scandal of 1757. u will now
in britain 1756, violent rains had pretty much destroyed the wheat crop grown. it was shitty quality and since it was soggy, u couldn't make flour properly from it. so parliament issued standard bread to be made, with more bran than usual, which was cheaper, but also a darker loaf than normal wheat flour would make. people associated bran bread with poverty and wanted loaves that were whiter than white(white as curd to be precise). the rage for white bread was unreasonable and the only way that bakers could make white bread from poor flour was by adding alum to it. alum.
if u dont know, alum is a double sulfate salt of aluminium, usually referring to potassium alum but given the time period there's no way to know for sure.
the whole thing led to a wild series of accusations abt the additions being used in British loaves, where ppl believed they were using anything from chalk and lime to literal ground up bones(this is where the jack and the beanstalk grind his bones to make my bread line comes from)
anyway yeah there's a lot more to it but man bread history is fucking wild