Beef (ground)

The grinding process itself is what raises ground beef's histamine concern compared to a whole steak.

• More surface area, faster bacterial activity — grinding breaks the meat into tiny pieces, dramatically increasing the surface exposed to air and bacteria, which accelerates the conversion of the amino acid histidine into histamine

• Time in the fridge matters a lot — ground beef that's been sitting for a day or two will have notably more histamine than freshly ground meat, even if both smell and look fine

Buying ground beef the day you plan to cook it, or grinding your own from a fresh whole cut, can help keep histamine on the lower end.