Rust Removers- phosphoric acid

Not sure if any of my fellow bloggers remember, but phosphoric acid is also present in Coca-Cola. This acid is the active agent in rust removers and its salts are used in detergents. While that sounds quite disturbing (as Victoria would say), phosphates are vital to our diet! They make DNA and are needed for the making of ATP (hopefully everyone remembers what that is!) ; they also regulate calcium transport.
It is unusual that we would have a shortage of phosphoric acid in our diet since our body recycles it so effectively- but if that were to happen, we have a large storage of phosphate in our skeleton.
In fact, in the 1950s and 60s, many people used cola to clean their chrome bumpers. The phosphoric acid reacted with the chrome to get the final product of chromium phosphate, which protected it! This dissolved any rust which is why anti-rust paints rely on its component of phosphoric acid.
Yes, colas do contain an "industrial cleaner," but not to worry: any phosphate in our food becomes phosphoric acid in our stomach anyway. ALL living cells need phosphoric acid, yet it does not matter where this acid actually comes from.
We obtain most of the phosphate by eating fish, meat, eggs, and dairy products. Some unnatural sources are colas, processed cheese, cheese spreads, sausages, and cooked meats.