Maybe I am just crazy biologically but like coffee newer worked on me. I used to drink a lot of the stuff. And not the american coffee flavored tea either. I mean proper black coffee made with 2 overflowing teaspoons of coffee and 2 equal ones of sugar per [url=https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fwww.ikea.com%2Fsg%2Fen%2Fimages%2Fproducts%2Fvaerdera-coffee-cup-and-saucer__0711123_PE727991_S5.JPG&f=1&nofb=1]cup[/url]. Yes, that sized cup. And no milk to water it down either. Stuff was basically an energy drink at that point and I newer got so much as mildly more awake from it. So one day I just stopped. And I've actually been feeling more awake since.