I don't think there is any one thing that you should or shouldn't eat. It is all about how your body handles it. My body loves coffee and I can't do without it. The CD isn't affected by it. Heck, I drink so much of it that it probably built an ammunity to it.
I say, if you can tolerate it then drink it. Now for the nicotine....that is a whole nother story.
I drink 1 cup, second cup seerms to make me nausaious(spellcheck). all I need is one sip in A.M. and I'm running to br. but that depends hopw late my last pain med was. I try not to take pain med's past 7pm(if I can). all our diets are individual, whats good for someone is not good for me. and verse visa, or vice versa.