Flavour enhancers are commonly added to commercially produced food products (eg. frozen dinners, instant soups, snackfoods) to make them taste more 'savoury'.
The commonly used flavour enhancers are:
Australian
... Museum, Carlisle
Derby and Derbyshire
Derby Industrial Museum[?]
Derby Museum and Art Gallery[?]
National Trust Museum of Childhood[?]
Working Textile Museum[?], ...