A new study finds that for people with food sensitivities, especially lactose intolerance, eating dairy before bed may trigger bad dreams and disrupt sleep quality.

Can the cheese you eat before bed really haunt your dreams? A recent study published in Frontiers in Psychology has shed light on this age-old question, revealing that certain foods, especially dairy, may affect sleep and dreams in people with food sensitivities.

The research involved 1,082 undergraduate students surveyed between January and April 2023. Participants reported their dietary habits, food sensitivities, sleep quality, and dream experiences using established questionnaires such as the Pittsburgh Sleep Quality Index.

Around 40 per cent of participants believed certain foods or late-night eating affected their sleep, while 5.5 per cent reported that food specifically influenced their dreams. Among the foods blamed, desserts, sweets, and dairy products topped the list, with 31 per cent pointing to sweets and 22 per cent to dairy as culprits for dream disruptions.

The study found a significant link between nightmares and lactose intolerance. Researchers proposed the "food distress hypothesis", suggesting that gastrointestinal symptoms such as cramps or gas from consuming dairy could disrupt sleep and trigger nightmares. Those with food allergies or gluten intolerance also showed similar but weaker associations.

Another explanation, known as the "sleep effects hypothesis", proposes that poor dietary habits, including eating late at night and ignoring hunger cues, may lower sleep quality and increase negative dream content.

While the connection between food and dreams has been part of folklore for centuries, this study offers scientific evidence for a biological basis. The findings suggest that for individuals with sensitivities, avoiding certain foods, especially dairy, before bed could be a simple way to improve sleep and reduce nightmares.

However, researchers caution that further experimental studies are needed to confirm these results and understand how food-related gastrointestinal distress directly influences sleep and dreaming.

For now, if you are prone to vivid or unpleasant dreams, considering dietary changes before bedtime might help you rest more peacefully.

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