Robin Temple wrote: > Have you heard about the chemical Bisphenol A? It is used in most > canned goods worldwide. It migrates into the food and may be a cancer > causing substance. Bisphenol A is in the epoxy coating inside some cans, and is being phased out according to this: www.foodproductiondaily.com/Packaging/Bisphenol-A-free-polymer-coating-touted-as-alternative-to-epoxy-can-lining They might find something wrong with the polymer, so use sardines packed in uncoated cans. I don't know why canned sardines would cause burps, maybe just because they are cooked and therefore hard to digest. I used a squeeze of lemon on them, and don't remember burping. William