It sounds like most of you, based on your experience, don’t think it is a good idea to reintroduce caffeine. Well, I gave it a try. I had a cup of my favourite green tea yesterday morning and felt fantastic, a bit as if I had taken a “happy drug” (but I am sure it was just Vietnamese mountain tea). I had lots of energy, went for two walks (instead of one) and did lots of other things. I felt 100% and even slept well. Today (29 hours later) I feel a bit tired. Went to my strength gym this morning, but all the weights felt more heavy. My head feels a bit spaced out, but no signs of any migraine so far. Maybe I am tired because I did too much yesterday?
After reading your comments (thank you!) I think I’ll definitely take a cautious approach. That probably means 1 cup of green tea once or twice a week. And maybe a coffee once a month.