“Eating cheese before bed gives you nightmares.”

The idea that a late-night snack of cheese can usher in a night of terrifying dreams is a persistent belief with roots stretching back centuries. This common misconception gained significant traction in popular culture, famously appearing in Charles Dickens' "A Christmas Carol" from 1843, where Ebenezer Scrooge attributed his ghostly visions to "an undigested bit of beef, a blot of mustard, a crumb of cheese". Later, in the early 1900s, the widely read comic strip "Dream of the Rarebit Fiend" by Winsor McCay further cemented this notion, depicting characters plagued by bizarre and disturbing dreams after consuming Welsh rarebit, a rich, melted cheese dish. These cultural touchstones helped to embed the myth deeply into public consciousness.

While the direct link between cheese and nightmares is largely unsubstantiated, there's a plausible reason this myth has endured. Research suggests that eating any heavy or fatty food, including cheese, close to bedtime can indeed disrupt sleep quality. This disruption can lead to more fragmented sleep cycles and an increased likelihood of remembering dreams, including those that are unpleasant or vivid. More specifically, some studies have found an association between dairy consumption and disturbing dreams, particularly in individuals with lactose intolerance. For these individuals, the gastrointestinal discomfort—such as bloating, gas, or cramps—caused by digesting dairy can significantly disturb sleep and, in turn, influence the nature of their dreams.

People commonly believe this myth because their personal experiences often seem to confirm it. If someone eats a rich cheese dish before bed and subsequently has a restless night with vivid, unsettling dreams, they might naturally connect the two events. This anecdotal evidence is bolstered by the cultural references that suggest cheese as a dream disruptor, creating a self-reinforcing belief. Essentially, if one expects cheese to cause nightmares, they are more likely to notice and recall any bad dreams that occur after a cheesy supper. However, it's important to understand that this effect is not universal and is more closely tied to general digestive upset and sleep disturbance rather than a unique nightmare-inducing property of cheese itself.