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Does chocolate affect dreams?

Chocolate is a beloved treat around the world. The sweet, rich taste of chocolate is hard to resist for many people. Some sources claim that eating chocolate before bed can lead to more vivid, intense, or even strange dreams. But is there any scientific evidence to back up this idea?

The origins of the chocolate-dream connection

The notion that chocolate influences dreams is not a new one. In fact, it dates back centuries in Mesoamerican cultures such as the Aztecs and Mayans. In Aztec mythology, cacao was considered the “food of the gods,” and the Aztec emperor Montezuma II was reported to drink copious amounts of chocolate before visiting his harem. Ancient Mayans consumed chocolate in religious rituals and believed the cacao plant had divine origins.

During the Victorian era in Europe, chocolate drinking became fashionable. Some medical experts at the time suggested that chocolate caused excitation and stimulated the nervous system in ways that could influence dreams. The concept has persisted into modern day, with many people still believing chocolate impacts their dream state.

Proposed reasons for the chocolate-dream link

There are several theories for why chocolate may be linked to dreams:

Chemical composition

Chocolate contains compounds that alter mood and physiology, which may indirectly affect dreams. These include:

  • Theobromine: A stimulant similar to caffeine, which could make dreams more vivid.
  • Tryptophan: An amino acid that gets converted into serotonin and melatonin, promoting sleep and dreams.
  • Phenethylamine: An intoxicating compound that elevates mood and arousal.
  • Magnesium: A mineral that reduces stress and may promote restful sleep.

Fat and sugar content

Chocolate has high amounts of fat and sugar. Eating chocolate before bed may give a burst of energy through increased blood sugar. This could delay sleep onset and alter the dreaming state once asleep.

Effects on sleep cycles

Chocolate impacts sleep cycles and architecture. Consuming chocolate can shorten REM latency – the time it takes to reach REM sleep once asleep. More time in the REM stage could mean longer, more intense dreams.

Memory and pleasure response

Chocolate evokes a strong sensory and emotional response. The taste, smell, and feel-good chemicals may get incorporated into dreams, making them seem more vivid. Chocolate also engages the hippocampus, which plays a role in memory formation during sleep.

Scientific research on chocolate and dreams

Despite the theories, there is limited scientific consensus on how chocolate impacts dreams. Here is a summary of key research findings:

Small studies suggest effects on dreams

A few small studies using questionnaires and dream diaries have found associations between chocolate consumption and dream characteristics:

  • One study of 200 participants found those who ate chocolate daily reported more frequent nightmares than those who didn’t.
  • Another small study found participants had more pleasant, romantic, and sexual dreams after eating chocolate._
  • However, two other studies found no significant differences in dream content between chocolate eaters and non-eaters._

Overall, limited evidence from small studies hints chocolate may impact dreams in some way. But more rigorous research is needed.

No effect on REM or sleep cycles

Controlled studies monitoring brain waves and sleep cycles have not found major effects of chocolate on dreaming:

  • EEG monitoring showed chocolate did not alter REM sleep or dream recall frequency.
  • Another study found no difference in REM latency or density with chocolate consumption.
  • However, chocolate did appear to improve overall sleep quality in some studies.

So while chocolate may help some people sleep better, it may not directly affect the dreaming stage.

Mixed effects on mood and cognition

Chocolate seems to improve mood, but may not enhance cognitive function:

  • Several studies found chocolate boosted self-rated mood, calmness, and contentment.
  • But chocolate didn’t significantly improve scores on tests of memory, attention, or problem-solving.
  • This suggests chocolate may not directly amplify cognition enough to intensify dreams.

Other factors influencing dreams

While the evidence is inconclusive on chocolate’s effects on dreams, other factors are known to impact dreaming:

Sleep deprivation

Lack of sleep can lead to more intense, vivid dreams when you finally get to sleep. Going to bed hungry or eating heavy close to bedtime may disrupt sleep.


Some medications and drugs can alter dream patterns. These include antidepressants, blood pressure medications, and illicit drugs.

Stress and trauma

Stressful events and trauma often manifest in dreams. Major life changes can also spark strange, intense dreams as your mind works through things.


Like chocolate, cheese contains tryptophan which may promote vivid dreams. There’s some anecdotal evidence for the “cheese dream” effect.

Spicy foods

Spicy foods like chili peppers can cause indigestion, which may disrupt sleep and trigger strange dreams.

Tips for analyzing your chocolate-related dreams

Since research is inconclusive, you’ll need to pay attention to your personal experiences to see if chocolate is impacting your dreams. Here are some tips:

  • Keep a dream journal – record dreams for 2 weeks while eating chocolate vs. not eating it.
  • Note key dream characteristics – vividness, bizarreness, color, intensity, themes.
  • Record other factors like stress, sleep schedule, medications.
  • Look for patterns with chocolate consumption – do dreams occur more with chocolate?
  • Pay attention to timing – dreams may correlate more with chocolate eaten right before bed.

Comparing multiple dreams over time can help uncover if chocolate is a contributing factor for you personally.


Many people firmly believe chocolate affects their dreams, making them more vivid and peculiar. However, the scientific evidence is mixed and inconclusive. While some small studies have hinted chocolate may influence dream characteristics, objective monitoring of brain activity has not found major effects on REM sleep.

Until more rigorous research is conducted, the chocolate-dream connection remains up for debate. It likely depends on individual factors like sleep habits, brain chemistry, and responsiveness to chocolate’s compounds. Those who suspect chocolate impacts their dreams can experiment by comparing dream journals after eating chocolate vs. abstaining.

But regardless of its true effects on dreams, chocolate remains a delicious indulgence to satisfy a sweet craving. Just be mindful of your own sleep patterns and limitations if consuming chocolate close to bedtime.