“Eating cheese before bed causes nightmares.”

The enduring notion that a late-night snack of cheese can summon terrifying dreams has roots deep in popular culture. This misconception gained significant traction thanks to literary and artistic works. Charles Dickens notably contributed to the myth in his 1843 novella "A Christmas Carol," where Ebenezer Scrooge attributes his haunting visions to "a crumb of cheese" among other indigestible foods. Later, in the early 1900s, the widely popular comic strip "Dream of the Rarebit Fiend" further solidified this idea by depicting characters experiencing bizarre and disturbing nightmares after consuming Welsh rarebit, a dish primarily composed of melted spiced cheese on toast. These cultural touchstones ingrained the idea into public consciousness.

Despite its persistent presence in folklore, scientific evidence directly linking cheese to nightmares for the general population remains elusive. While some theories have explored the presence of compounds like tyramine and tryptophan in cheese, which can influence brain activity and sleep regulation, there's no conclusive proof that these directly lead to bad dreams. In fact, research, such as a 2005 study by the British Cheese Board, found that participants who ate cheese before bed did not experience nightmares; instead, different cheeses were associated with various types of dreams, none of which were negative. More recent studies suggest that if dairy does affect dreams, it's often due to digestive discomfort from lactose intolerance, which can disrupt sleep and, in turn, lead to more vivid or remembered dreams, rather than an inherent nightmare-inducing quality of cheese itself.

The reason this myth continues to be widely believed likely stems from a combination of factors. The powerful cultural narratives established by Dickens and the "Dream of the Rarebit Fiend" created an expectation that has been passed down through generations. Furthermore, there is a kernel of truth in the broader idea that eating any heavy or rich meal close to bedtime can lead to indigestion and disrupted sleep. When sleep is disturbed, people are more prone to remembering their dreams, including any unpleasant ones, which might then be mistakenly attributed to the last food consumed, like cheese.