The Second Brain
Gut bacteria produce 90% of the body’s serotonin, the precursor to melatonin.
Microbiome Mechanisms
Short-Chain Fatty Acids
Butyrate-producing bacteria increase slow-wave sleep by 30% in animal studies.
Tryptophan Metabolism
Healthy gut flora converts 50% more dietary tryptophan to sleep-regulating compounds.
Nutritional Interventions
Prebiotic Timing
Consuming prebiotics at dinner enhances their sleep-promoting effects.
Fermented Foods
Daily kefir or kimchi reduces nighttime awakenings by 41% in 4 weeks.
Evening Fiber Intake
10g of soluble fiber before bed improves sleep continuity metrics.
Polyphenol-Rich Foods
Cherries and walnuts increase melatonin bioavailability by 35%.
Common Digestive Disruptors
Food Sensitivities
Histamine Intolerance
High-histamine foods cause 72% of affected individuals to report sleep disturbances.
FODMAP Timing
Fermentable carbs consumed late cause 53% more sleep interruptions in sensitive people.
Meal Composition
Protein Quality
Collagen peptides before bed provide glycine for deeper sleep stages.
Fat Digestion
MCT oil at dinner improves sleep quality without digestive burden.