King or Tayto? Barrys or Lyons? 

The secret to a happy marriage could come down to the food shop!

Researchers have found that brand disagreements have a psychological effect on relationships and can lead to the loser feeling resentful over the years.

Experts said regularly finding your other half's favourites in the fridge causes a 'death by a thousand cuts' feeling.

So next time you see the Chef Ketchup instead of Heinz, try and keep your cool, and don't even start us on the fridge Vs cupboard argument!

Jenny Whelan from Checkout Magazine spoke to Kim Buckley about brand loyalty in Ireland: