Acids and bases
Inorganic functions is we have a stomach heartburn and we drink an antacid, it occurs because of chemical reaction in our bodies that is called neutralization. That reaction happens through acids and bases, resulting in water and salt and that reaction in the stomach, the main component of the gastric juice is HCL (Hydrochloric acid) many factors make this quantity of acid increase giving the feeling of a heartburn and to neutralize it we need a base that in this case are antacids like magnesium milk.
In world war 2 these functions were used for mass murder of Jews the gas used was HCL, a gas that is very harmful to humans.
Nowadays there is a treaty that prohibits the manufacture or use of chemical weapons