Common mistakes around sleep and nutrition include eating heavy or sugary meals late at night, consuming caffeine or alcohol before bed, and relying on supplements without evidence. Many people turn to DNA-based tests for personalized sleep-nutrition advice, but the evidence is weak – mostly observational or GWAS with small effect sizes. Factors like meal timing, macronutrient composition, and individual tolerance matter more than single gene variants. For example, variants in CLOCK or PER genes have been studied but lack proven dietary interventions. The best approach is consistent meal timing, avoiding large meals 2–3 hours before sleep, and limiting stimulants. Caveat: No direct context was provided; this answer is based on general sleep-nutrition knowledge. Evidence grade: unclear/practice.
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