OK, so this isn’t an out and out article on where one should keep their tomato ketchup once they’ve got it home from the supermarket. Rather, this post aims to clear up the storm that London mayor Boris Johnson started when he declared how he liked to store his tomato ketchup in the cupboard instead of the fridge.
You might ask ‘does it even matter’, well according to Dr Lisa Ackerley (and Boris), it does…and here’s why. Since the rise in awareness surrounding the high quantities of sugar and salt in ketchup, Heinz have actively reduced the amounts in the product. This is a move in the right direction, but salt and sugar acts as a preservative meaning the lower amounts reduce the ketchups shelf life. So to conclude, tomato ketchup should be kept in the fridge from the moment it’s opened should you wish to keep bacterial levels low and preserve its shelf life.
If the label on a product prompts you to keep it refrigerated, then that’s exactly what you should do.
Source (or should I say ‘sauce’)
The Telegraph, (2014). The great ketchup debate: to fridge or not to fridge? Retrieved 7th August, 2014, from http://www.telegraph.co.uk/health/11018607/The-great-ketchup-debate-to-fridge-or-not-to-fridge.html