I realize this was discussed on another post http://forums.phoenixrising.me/index.php?threads/who-feels-better-for-eating.30004/ But the post never really got into what the cause could be. I feel this should be a part of a technical discussion, because we might be onto something here. I feel this phenomenon is too pervasive to ignore. I personally for years get immediate improvement of my brain fog, lightheadedness, etc, pretty much immediately after eating, and it has to be meat protein, carbs, salad, whole meal type thing. Eating something sweet doesn't work, which has brought me to realize it is not low blood sugar. I have some theories and would like some input from the patrons here on the likely cause, given how quickly it happens. My theories are in order of how likely I think the cause is: 1. Neurotransmitters released by the act of eating. But what are they? Because that means we can find a way to induce them and get immediate relief. It can't be serotonin, because it takes some time for food to replenish your serotonin levels. It's got to be a more visceral process. One reason I lean towards this is eating some sort of hardcore digestive or spice taken with the food speeds up the effect, which points strongly to an endorphin response. Dopamine maybe? And is it possible this endorphin response has immediate impact on cerebral perfusion? 2. Placebo. I'm strongly prone to this. Sometimes. 3. Amino acids or nutrients in food that we may be missing. But again, this should take some time. But even when I have a bad cold I feel better right after eating, way too quickly for the food to be processed by my body. 4. Autonomic changes in digestive system (mainly around the stomach) that may affect the vagus nerve? This may explain why eating actually makes some of us worse? 5. Does the placement of food in the body temporarily cause an immunomodulatory response? etc...?