If you are suffering from insomnia, or cannot have that good undisturbed sleep you need to have some medication to have a sound sleep so as to get up refreshed and with full of energy to do your work. The pineal gland of our brain secretes melatonin that enables us not only to sleep but also fight against viruses and bacteria. It also acts as a powerful antioxidant. As you grow old, this secretion decreases and you need to take melatonin supplements. Working Of The Supplement Your body which has its own internal clock controls your natural dark and light cycle. If your biological clock is disturbed, you get problems in sleeping, the mood that you cannot control upon waking changed rhythm of your heart. A little supplement of melatonina can help. You do not have to take a very large amount of supplements daily, but a dose of melatonina 3mg only shall be enough for meeting your deficiencies. Melatonina is used for SAD or treating the seasonal affective disorder, in