Cheap and recycled cookware or cooking oil would be up there on the list of interesting things to check imho - https://www.bbc.com/news/articles/cml2kr9wkdzo h

Cheap and recycled cookware or cooking oil would be up there on the list of interesting things to check imho - https://www.bbc.com/news/articles/cml2kr9wkdzo https://www.bbc.com/news/articles/cml2kr9wkdzo - https://en.wikipedia.org/wiki/Gutter_oil https://en.wikipedia.org/wiki/Gutter_oil - https://www.nature.com/articles/s41370-024-00686-7 https://www.nature.com/articles/s41370-024-00686-7 Anywhere in the supply chain to a streetfood stall, or mom and pop restaurant or cornershop/bodega equivalent could have substitutions made that other people in the chain may not notice