What is the correct dose for melatonin as a sleep aid?

0.3 - 1.0 mg: Take it 90min before sleep. Take the smaller dose and see if it works. Much higher doses can actually interfere with sleep.

0.3 mg-3 mg: Start with lower dose and work up as needed. Only use melatonin for < 3 months. New data suggests trying the lowest dose range before pushing to more conventional 1-3 mg as the brain may be more responsive to it then we thought. Too much can cause headache, nausea, nightmares, morning grogginess. Don't use if pregnant, have cancer, diabetes, depression, seizures, auto immune disease, lymphomas.