Melatonin 20 mg Supplemental Facts Amount Per Serving each vegetarian capsule contains: melatonin This supplement is a 99.5% pure synthetic melatonin. other ingredients: hypoallergenic plant fiber (cellulose), vegetarian capsule (cellulose, water) Not to be taken by pregnant or lactating women. May have sedating effects and is for bedtime use only. This product may be contraindicated in depression, seasonal affective disorder, schizophrenia, autoimmune disease, asthma and for individuals taking MAO inhibitors or corticosteroids. 1 capsule 1/2 to 1 hour before bedtime.