Stress ranks second in its relevance to sleep. If you cannot relax, you cannot sleep. The factor we have not yet discussed is food. What we eat has a tremendous affect on how well we sleep. Tryptophan is the main ingredient often missing from our diet. The shortage of tryptophan in the diet leads directly to stress, psychological disorders, and sleep problems. Tryptophan is the raw material for the manufacture of serotonin. Serotonin affects melatonin production in the pineal gland and, ultimately, helps regulate our sleep and wake cycles.

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