amount of melatonin for adults
Melatonin Dosage for Adults. 1  Insomnia: Taking 1 mg to 3 mg at least 1 hour before going to bed is usually effective. 2  Jet lag: 0.5 â 5 mg of melatonin 1 hour before going to bed at final destination. 3  Seasonal affective disorder: 0.25 to 5 mg daily.  Sleep enhancement: 0.1 to 6mg taken 30 â 60 minutes before going to bed.