Where does NaCl come from?

Answer 1

A small amount of sodium is naturally present in most foods, but most dietary sodium is found in processed foods in the form of salt. Salt may be added for flavor enhancement and to extend the shelf life of certain foods. Salt is added to most canned foods, some frozen vegetables, most fast foods, and pickled foods. It is used in most sauces, soups, salad dressings, and many breakfast cereals. It is also found in many other ingredients used in food processing. Many commercially prepared condiments and seasonings are also high in sodium.

Answer 2

It comes from the neutralisation of sodium hydroxide and hydrochloric acid which gives you a salt (NaCl) and water

HCl + NaOH = NaCl + H2O