I get woozy if my meal is too carb laden. Temple Grandin talks about this too. Try a day with lean proteins and plenty of fresh vegetables (no starchy ones) and fresh fruit; lay off sugary stuff. I'd almost guarantee you feel incredibly different. If not, it might not hurt to have a glucose tolerance test, you might be lightly hypoglycemic.
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We are not so different from potted plants in that, if given everything we need to be properly nourished, the outcome can be incredibly contrary to when we are not. A flower won't grow in flour, and neither can we.