There was lead in literal food on shelves. https://www.pbs.org/newshour/health/recalled-lead-tainted-applesauce-pouches-stayed-on-dollar-tree-shelves-for-weeks-fda-says
Really think about supply chains and products and the benefits that China or hostile nations may have to send poison to the US (instead of bombs). People assume these products will be safe but we have modern day examples where they clearly aren’t, no matter what the laws say. The law doesn’t matter if it isn’t enforced. Items can be swapped or mislabeled. https://www.nzherald.co.nz/lifestyle/temu-toxicology-test-concern-as-lead-is-found-in-an-item-sold-on-the-site/XL5OYZ6JWJEQFAHEVK6GZUMIGY/