How do you know if something will taste incredible? Three little numbers on the back of the packaging: 621 (aka flavour enhancer 621, aka monosodium glutamate, aka MSG)! We go deep and ask the big questions like: is MSG safe? And more importantly, does it work on hot cross buns? We also cover its links to racism and how to use it best in cooking. Then things get a little weird and we get a bit obsessive about the best corn chips and Ben adds MSG to martinis. 

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