A special chemical in tomatoes - the one which makes them bright red - might help stop cancer developing, scientists reckon.
They claim eating pizza, which has loads of tomatoes in it, can help reduce the risk of getting throat, stomach and mouth cancer.
Fat and salt
But other experts aren't sure this is true.
They said it's more likely to be people's general eating habits which help stop cancer, not just chomping away on pizza.
And health experts have also warned that many pizzas are full of fat and salt, and people shouldn't eat too much of the fave fast food.
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