So you didn't read the part where it talks about the (legal) use of TSP as a food additive, then? Trisodium phosphate is commonly found in many brands of child

So you didn't read the part where it talks about the (legal) use of TSP as a food additive, then? Trisodium phosphate is commonly found in many brands of children's cereal, toothpaste, processed cheese, meats, and canned soups. That is tagged as an "unreliable quote" by Wikipedia, but the fact that TSP has an E-number in the EU must mean it is (was?) used in food products.