Aroma and flavor enhancer is a food additive. Below are all the products whose label lists it, ordered just like the other lists.
Aroma and flavor enhancer (E621) – flavour enhancer. Monosodium glutamate (MSG) enhances savoury taste; glutamate occurs naturally in tomatoes, cheese and mushrooms. In 2017 EFSA set a group safe intake of 30 mg/kg body weight a day.
Source: EU register of food additives (Reg. (EC) No 1333/2008) and EFSA.