Whether glucose is useful for sleep requires a nuanced answer. A small amount of glucose before bed may slightly boost serotonin and melatonin by facilitating tryptophan uptake in the brain. However, the evidence is weak and inconsistent. Studies indicate that elevated blood glucose before sleep can impair sleep quality by disrupting nocturnal hormone secretion and increasing nighttime awakenings. This is especially relevant for individuals with insulin resistance or prediabetes. Long-term use of glucose as a sleep aid is not supported by clinical trials and is not recommended. Instead, a balanced diet with complex carbohydrates and adequate fiber promotes stable blood sugar and better sleep. MyBody-X tests for blood sugar or sleep genes (e.g., CLOCK, PER) provide only suggestive insights, not actionable directives. Conclusion: glucose is not an evidence-based sleep aid; focus on good sleep hygiene and stable blood glucose levels.
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