If you eat cheese before bed you're sure to get nightmares. At least, that's a common piece of folk wisdom.
But in 2005, the British Cheese Board (a cheese industry group) tried to put this old wives' tale to bed. The team gave 200 participants a snack of cheese 30 minutes before bedtime and then asked them to record their dreams.
None reported nightmares and many had pleasant night reveries. The researchers even classified cheeses by their effect: Blue stilton produced the trippiest dreams, involving warrior kittens and vegetarian crocodiles, the Nature Mind Read blog reported (opens in new tab). Cheshire cheese produced the dullest effect, with most people dreaming about nothing at all. The researchers didn't have a control group, so there's no way to know how the cheese-tinted dreams stacked up against those who didn't have a bedtime cheese snack or those who had another snack, say, soy-based cheese.
Some theories suggests that the bacterial and fungal elements of cheese contain psychoactive ingredients that affect dreams, but there's no data to support that idea.