07/03/2025
The 2025 study, “More Dreams of the Rarebit Fiend: Food Sensitivity and Dietary Correlates of Sleep and Dreaming” (PMID: 38975901), published in Frontiers in Psychology, surveyed 1,082 students at MacEwan University and uncovered significant links between lactose intolerance, dairy consumption, and various sleep disturbances beyond just nightmares. The findings showed that lactose intolerance is associated with not only increased nightmare frequency and severity but also poorer overall sleep quality, reduced dream recall, and disrupted sleep patterns, likely due to gastrointestinal discomfort (e.g., bloating, cramping, gas) from dairy affecting REM sleep and dream states. About 40% of participants believed specific foods, especially dairy (22%), worsened sleep, while unhealthy eating habits, like late-night snacking, were tied to negative dream content and lower sleep quality. Women reported more food intolerances, poorer sleep, and higher nightmare frequency than men. To improve sleep:
• Try Grass-Fed Raw Dairy: Raw dairy from grass-fed cows may retain enzymes that aid digestion for some, potentially reducing sleep disruptions. Source from trusted suppliers.
• Explore A2 Milk: A2 milk, free of A1 beta-casein, may be easier to digest for lactose-sensitive individuals, potentially improving sleep quality.
• Consider Goat or Sheep Milk: These contain less lactose and different proteins, possibly causing fewer sleep-disrupting digestive issues.
• Choose Coconut Milk: A lactose-free, plant-based alternative, coconut milk is ideal for bedtime drinks or recipes to avoid sleep disturbances.
• Support Gut Health: Non-dairy fermented foods like coconut yogurt can enhance gut microbiota, potentially improving sleep via the gut-brain axis.
I’ve talked about this topic at length on my podcast, The Art of Being Well and in articles on drwillcole.com.
There is a lot of bio-individuality when it comes to food sensitivities of all kinds. Labs and tailored protocols can help these issues remarkably . Link in bio for how my telehealth team and I work with people around the world.