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Nightmares? It Might Be Something You Ate

A new study finds that food sensitivities and eating late at night predispose to bad dreams.

6 min readJul 1, 2025

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When the ghost of Jacob Marley sits across from Ebenezer Scrooge in A Christmas Carol, he observes that the miser doesn’t believe in him.

Scrooge, with forced bravado, says he’s right. The ghost may be in actuality

…an undigested bit of beef, a blot of mustard, a crumb of cheese… There’s more of gravy than of grave about you!

And so we see that even in 1843, people had the belief that there was some link between the food we eat and the nightmares that plague us at the witching hour.

But… is it true? Does the dinner plate affect the nightmare state? Does a late-night snack make your dreams more wack?

The inspiration for today’s little reverie is this perplexingly-entitled study, appearing in Frontiers in Psychology.

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Source: Nielsen et al. Frontiers in Psych. 2025

To save you the googling, the “dreams of the rarebit fiend” were a series of comics published in the early 1900’s…

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F. Perry Wilson, MD
F. Perry Wilson, MD

Written by F. Perry Wilson, MD

Medicine, science, statistics. Associate Professor of Medicine and Public Health at Yale. Co-Host "Wellness, Actually" Pod. "Impact Factor" on Medscape.