Hellmann's settles mayo debate over whether it belongs in fridge or cupboard The confusion is rife over whether mayonnaise should be kept refrigerated or in a cupboard - and it's easy to see why many of us are unsure of the correct method.
The reason for refrigeration is simple: once opened, mayonnaise becomes vulnerable to bacterial growth, and colder temperatures help slow down this process, keeping it fresher for longer.
In Hellmann's mayonnaise case, the label advises: "After opening, keep refrigerated and use within three months.".
And the correct method isn't all that clear, especially when different mayonnaise bottles have a different set of storage requirements.
In the case of Hellmann’s mayonnaise, failing to store it properly can lead to foodborne illnesses, including food poisoning - and no ones likes to be sick.
