Aside from casein, you'll also find that many so-called "natural" food products contain MSG in the form of yeast extract, another deceptive ingredient used in many natural foods.

The place where old-school BBC rules about "sticky-backed plastic" and "a proprietary brand of spreadable yeast extract" still obtain to a ludicrous extent.

Tinned pasta and salty flavourings such as gravies and yeast extract are among the foodstuffs blamed by the University of Bristol researchers.