Hamburger

A burger's histamine load depends heavily on how fresh the beef is and what goes on top of it.

• Ground beef — mincing meat dramatically increases its surface area, which speeds up histamine development; freshness matters far more here than with a whole cut of beef

• Classic toppings — ketchup (tomato and vinegar), pickles (fermented), mustard, and aged cheese each contribute their own histamine or liberating effect

A freshly ground patty cooked the same day, with simpler toppings like lettuce, cucumber, or fresh onion, tends to be noticeably easier to tolerate.