I have a female cousin in her mid 30s, the mother of 3 children. Normally she is a quiet, polite, soft and gentle woman.
Feed her gluten (she's only fairly recently been diagnosed as a coeliac) and she swears like a harpy, sufficient to make a wharfie blush. She recognises the onset now but cannot stop the effect and segregates herself until the affects wear off. Food can d strange things to us too.
I hope the poor bugger gets better