Our brain is made up of billions of tiny brain cells called neurons. You can visualize the human brain as a complex network of neurons. Neurons communicate with each other through neurotransmitters. Sometimes, the brain can have an excess or deficiency of certain neurotransmitter that can manifest itself in physical symptoms that most textbook doctors (or the so-called "gate-keepers") would have no clue what to look for. If for example, you see your "gate-keeper" doctor and complaint that you have difficulty sleeping (insomnia), your HMO doctor would usually order CBC, thyroid, and other irrelevant blood tests, and most likely will tell you that everything is "normal." And once your primary care doctor has said that you are "normal," but you still can't sleep, don't you dare to ask your HMO "gate-keeper" doctor for a referral. He will give you the referral, but first, he will bad-mouth you to the referral doctor that you want to see. In his mind, "insomnia" is normal, since there are probably millions of people in the world, except himself, who are hungry and cannot sleep (insomnia). 

  I intend to write more about these useless doctors a little bit later, but for now, I want you to read this scientific article about neurotransmitters from the viewpoint of a neuroscientist. This article will show you that your symptoms, such as insomnia, can result from imbalances of your chemical messengers in the brain - neurotransmitters. I am sure you will benefit greatly from reading these articles, as I did.
  For starters, turn your TV off one hour before you go to bed if you have problems with falling asleep, or staying asleep. Take GABA 1 capsule and Melatonin 2 Mg. GABA is a nutritional supplement that you can buy from a health food store. Start with a low dose - 250 Mg.