Does What You Eat Affect Your Dreams?

The Cheese Myth — Sort Of

A 2005 study by the British Cheese Board found that different cheeses produced different dream themes — Stilton produced bizarre dreams, Cheddar produced dreams about celebrities, and Red Leicester produced nostalgic dreams. However, the study was industry-funded, had no control group, and relied on self-report. It is not serious science.

That said, there is a kernel of truth. Cheese contains tryptophan, a precursor to serotonin, which influences sleep architecture and dream content. Dairy before bed may slightly alter neurotransmitter balance during sleep — but the effect is subtle, not the nightmare factory of folklore.

Spicy Food

A 2015 study by Nielsen and Powell in the International Journal of Psychophysiology found a small but significant correlation between spicy food consumption before bed and disturbed sleep. The mechanism is likely gastrointestinal discomfort and elevated body temperature, both of which fragment sleep and increase awakenings — which in turn increases dream recall. You are not dreaming more vividly; you are waking more often and therefore remembering more.

Tryptophan and B6

Tryptophan (found in turkey, eggs, cheese, and nuts) is a building block of serotonin and melatonin. Vitamin B6 is essential for converting tryptophan into these sleep-regulating compounds. A 2018 randomized controlled trial by Aspy et al. found that 240mg of vitamin B6 before bed significantly increased dream vividness and recall, though it did not affect sleep quality. This is one of the few supplement-dream connections with genuine empirical support.

Alcohol

Alcohol is the most significant dietary factor affecting dreams. While it may help you fall asleep faster, alcohol suppresses REM sleep in the first half of the night. When it metabolizes, REM rebounds aggressively in the second half, producing unusually vivid, emotionally intense, and often disturbing dreams. This REM rebound effect is well-documented and explains the vivid nightmares associated with heavy drinking.

The Bottom Line

Diet affects dreams primarily through its effects on sleep architecture. Anything that fragments sleep (spice, alcohol, caffeine, large meals) increases dream recall by increasing awakenings. Anything that affects serotonin pathways (tryptophan, B6) may subtly alter dream vividness. But the single most important dietary factor for dream quality is simple: do not eat a large meal within two hours of bedtime.