Will there be nitrous acid in salty bread overnight?

Nitrite in food, including sodium nitrite and potassium nitrite, often exists in industrial salt or meat preservatives due to misuse, and naturally there may be leftovers and trace nitrite in drinking water.

However, bread is generally made of refined salt, and the amount is very small, and the form existing in bread is not enough to form a danger.

For the determination of nitrite in food, most of them are aimed at:

Salt (refined salt), milk powder, sausage (sausage), pickles, Cantonese bacon, fresh meat, fresh fish, whole grains, meat products, sausages, sausage vegetables and other canned meat, other canned infant formula milk powder, fresh eggs, western-style boiled, smoked and canned ham, western-style canned ham and so on. But there is no need to worry about bread.