The World’s 5 Most Poisonous Foods - Page 4 of 9

Casu Marzu

This is a Sardinian sheep’s milk soft cheese that is left to ferment uncovered during its ‘ripening’ process so that flies are able to lay their eggs inside the cheese.

These eggs are responsible for the fermentation, or the maggots inside to be exact.

The problem is that when the maggots inside the cheese are dead and are ingested, they can cause severe illness by damaging the intestinal walls.