This is a very interesting thread. I changed some of my routines a couple of weeks ago and started eating dates and eggs for breakfast, instead of juice and milk. After a couple of days, I could no longer tolerate coffee, and was have anxiety attacks and high adrenaline and dizziness. I couldn't figure out why. It got so bad, I started to reluctantly gravitate back to my old ways - juice and milk. I was enjoying the novelty of the new morning routine, but anyways...Although I felt a bit better - anxiety disappeared with juice and milk - I still didn't feel "good". I remembered niacinamide, and started taking 500mg each morning, then increased it to 1g each day. Since doing that, I have felt great, and no anxiety. I am back to drinking strong coffee!