Bed bugs naturally give off high levels of histamine in their feces; DeVries says that bed bugs use histamine as a marker of a good place to aggregate. (sciencedaily.com)
We're looking at things like pepperoni, salami, baloni, bologna — all of the processed and fermented meats are actually aiming to give flavour to the foods so this is completely out because of the high level of histamine. (healinghistamine.com)