New research suggests that cheese gives people nightmares. People with a severe lactose intolerance were more likely to have bad dreams. The Dream and Nightmare Lab analyzed the diet and sleep patterns of 1,000 people. It investigated how food affected dreams. The lab based its research on a 2015 study that looked into "food-dependent dreaming". Participants in that study blamed dairy products for disrupting their sleep.

The lab found that people with stomach problems and lactose intolerance had scarier nightmares. It said stomach issues could lead to sleep disturbances and nightmares. A professor said many of us do not sleep well. Around 35 per cent of people could have a serious sleep disorder. Research suggests that about 85 per cent of adults have a nightmare at least once a year. About 5 per cent of people have a bad dream frequently.