Researchers at universities in the United States are investigating a substance called tyramine, a chemical that has been linked in Asia with sleep death in adults who have eaten fish sauce.
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The New York Presbyterian Hospital recommends that tyramine-based foods should be avoided while taking anti-depressants as the combination has been linked to sudden rises in blood pressure. The General Clinical Research Centre at the University of North Carolina has delivered similar findings.
Tyramine is found in fatty and fermented foods, such as cheese, and it has been linked as the agent that can trigger migraines in people who eat cheese. Some health care practitioners also suggest that people using the herb St John’s Wort avoid tyramine-containing foods.
Food that contains tyramine, or bacteria with enzymes that can convert other substances to tyramine, include aged cheeses such as Camembert, Mozzarella and Brie; salted herring and other dried fish and fermented sausages, such as pepperoni and salami. It is also found in a wide range of vegetables including avocado, tomatoes and spinach.
By Mark Rowe, just-food.com correspondent
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