Smokers are less likely than nonsmokers to have diets that are rich in vitamins and minerals.

The lung function of smokers whose diets are rich in those vitamins and minerals is generally better than that of nonsmokers with comparable diets.

People whose diets are deficient in those vitamins and minerals do not typically have other health problems in addition to diminished lung function.

Stopping smoking will not typically improve lung function more than any diet changes can.

Smoking does not introduce into the body chemicals that prevent the helpful vitamins and minerals from entering the bloodstream.