Melatonin is a hormone generated in the pineal gland of the brain. It secretes all through the day at different levels. It secretes the highest amount at night because it gets stimulated in the dark. Melatonin induces a good night’s sleep and regulates our sleeping pattern. It lowers the nighttime agitation in Alzheimer patients and improves sleep patterns in Dementia patients. Although it is marketed basically as a sleep aid, it has many other advantageous. Studies indicate that melatonin benefits the immune system and protects the heart from getting damaged due to acute exercise. It is effective for insomnia and jetlag and is not addictive. The normal dosage of melatonin for insomnia is 1-3mg before bedtime; for jetlag, it is 3 mg before bedtime for the first three nights.