Tess has been having trouble sleeping, so she wants to try melatonin. Before she does, she checks the recent National Institutes of Health report on melatonin. What will she learn?
a) There is little evidence for melatonin's efficacy in treating insomnia.
b) Melatonin is effective in reducing sleep latency and increasing total time asleep.
c) The dose required to achieve an effect is close to toxic levels, so it is best to avoid melatonin.
d) Melatonin affects sleep by relaxing the muscles, but the same effect can be achieved by a warm bath.
A
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