Simple. When you eat, your body directs more of your circulation to your digestive organs to absorb the nutrients. That means less blood flow to your brain. Voila, you are tired.
Blood in the stomach, i love that one.... You get tired b/c you move from the Fight/Flight part of the ANS to the Rest/Digest. Its the parasympathetic division of the ANS.
tryptophene (sp) is the amino acid that is converted into seratonin in the brain, but it needs insulin ti cross the blood/brain barrier. hints fat people saying that they eat to be happy se