NPR for North Texas
Play Live Radio
Next Up:
0:00 0:00
Available On Air Stations

Ketchup In The Fridge Or The Pantry? It's A Cold War

Just when you thought it was safe to go back into the condiment aisle, a British supermarket chain has reignited the ketchup wars.

To be clear, ASDA did not start the great debate over whether to keep an opened bottle of ketchup in the refrigerator or at room temperature. But the grocery store has callously dared to goad a long-simmering argument into a full-on cold war.

ASDA announced earlier this week that its superstore in Clapham, in southwest London, would begin to refrigerate some of its store-brand ketchup and leave the rest in its original location on the shelves. The decision came with a poll posted on Twitter.

The results bore witness to a deep and intractable divide among all the world's ketchup consumers ... or at least the 2,600-something Twitter users who could spare a click. Fifty-four percent said to keep it on the shelf; 46 percent said fridge.

If you ask ASDA's Victoria Williams, as the U.K.'s Daily Mail did, she'll tell you the gambit was a bid to "end the debate once and for all and give everyone what they want." Set aside for a second the fact that ASDA's stocking decisions, which involve the unopened condiment, are frankly irrelevant to the debate over the opened item.

How could store officials have known the unquenchable flames they'd stoke.

Because this is the Internet, it wasn't long before before the two sides returned to their campaigns of blame, invective and some sensible, constructive name-calling.

In fact, partisans on both sides of The Great Ketchup Dust-up of 2017 have taken to calling their counterparts "animals" — which raises the crucial question: Who is doing all this tweeting without opposable thumbs?

What do the experts have to say about it? Well, you might not be surprised to find the debate has wrought even them asunder.

Food historian Polly Russell tells the BBC that ketchup was sold long before households had fridges of their own, so why refrigerate them now? "They were absolute life-savers for housekeepers," she says, "adding flavour to food that might be slightly bland or monotonous."

The BBC adds: "Their acidity levels, coupled with salt and sugar content, means they were — and still are — microbiologically safe to keep at room temperature."

Returning to The Daily Mail, however, we can see microbiologist Peter Baratt said in 2014 that reduced salt, a natural preservative, has made our modern-day ketchup more needy of the fridge. He suggests a cautious, fridge-conscious approach: "While ketchup could keep safely in the cupboard for a couple of weeks, it's best kept in the fridge and eaten within the stated eight-week period."

Like butter, eggs and tomatoes — even tom ahtoes — ketchup's place in the kitchen may remain a tangled web of strife for now. And far be it from this blogger to come down on one side or the other.

But we can all agree it's ketchup — not catsup, you animals.

Copyright 2020 NPR. To see more, visit

Colin Dwyer covers breaking news for NPR. He reports on a wide array of subjects — from politics in Latin America and the Middle East, to the latest developments in sports and scientific research.