Cigarette smoke contains mutagenic heterocyclic amines, and so does prepared food.
Cigarettes can be lethal, but prepared food is even more lethal, for absorbed in greater quantities. Cigarette companies have to pay billions of dollars. Food-manufacturers producing formula milk, know what milk protein contains. Like they know that ,compared to mother s milk, bioavailibility of various minerals and metals in cow's milk is much lower. That's why they put so much more pro-oxidative metals in formula milk, hoping that the right amount of metals is absorbed.