The strongly flavored dark brown spread made from brewer's yeast has joined a number of products prohibited in Denmark under 2004 laws forbidding the sale of food products with added vitamins or minerals, The Daily Telegraph reported Tuesday.
The legislation was the result of a health scare over the products' effect on children or pregnant women when combined with other foods with high vitamin levels, the newspaper said.
A Copenhagen shop selling British food was told by the Danish Veterinary and Food Administration to stop selling the popular breakfast yeast spread, its owner said.
"I don't eat it myself, I don't like it, but Marmite was one of our best selling products," Marianne Orum, the owner of Abigail's, said.
"Not a day goes by without someone coming in and asking for it."
The shop has now started a "Bring back Marmite" campaign.
Lyndsay Jensen, a British-born graphic designer working in Copenhagen, said Britons would carry on spreading Marmite on their toast even if it meant smuggling it in to Denmark.
"They don't like it because it's foreign," she said. "But if they want to take my Marmite off me they'll have to wrench it from my cold dead hands."