The science behind how deli meats are made and why they taste the way they do

In this educational overview, a meat scientist walks readers through the transformation of raw pork into ready-to-eat ham, describing bone removal, large-piece brining with needle injection, and resting to absorb the solution. The seasoned meat is then placed in a food-safe casing, cooked in a smokehouse—either with real wood smoke or liquid smoke—and finally cooled for slicing, either at the plant or at a grocery deli.

Similar processes apply to other cold cuts, though bologna is finely chopped and shaped, while turkey and roast beef are sliced from whole roasts. The brine’s ingredients, especially salt, sugar, phosphates and nitrite, dictate the product’s taste, pink color and protection against harmful bacteria like those that cause botulism. While nitrite raises safety, it also sparks health debates over potential cancer-linked compounds.

Deli meats provide protein and iron but can be high in sodium, saturated fat and calories, prompting research into lower-salt formulations. Proper refrigeration—about two weeks unopened, three to five days after opening—ensures freshness.