@TrustyMutsi It sounds like you're doing a great job being your own food detective! I love it! I definitely agree drinking caffeine later in the day can cause sleep disturbances, and further more, if you're not really missing caffeine, maybe there's no need to add it back at all. As far as food sensitivity reactions, you're definitely within that window to notice changes. Most people think if they don't feel any different within 15-20 minutes, then that food must not be a problem. I've found that a lot of people first develop symptoms 2-3 days after consuming a problematic food. Keep up the great investigative work!