What do you (try to) refrain (and occasionally "cheat") from eating or drinking that you absolutely love to have but can't because of an allergy, reaction, illness, bad memory, bad association or something of that vein?
For me, I love pork and spare ribs but I gave it up for religious observances. Also love fruit drinks, particularly apple juice based ones but I have some sort of allergic reaction (hard to breath kind)a few minutes after drinking. Love coffee but restrict to one cup a week--tend to get a migraine if I drink too often.
Once had a horrendous 24hr stomach virus and thought I was recovered until I ate popcorn a few days later at the movies. I haven't really been able to enjoy popcorn since.
What's your "poison"?