Drinking coffee = breaking fast?

I was watching an episode of Joe Rogan and he had this lady on who was telling him about IF. She said that everything except water is breaking a fast. The reason she cites is that coffee and tea are “xenobiotics” which still cause a metabolic/hormonal response. I’d love to hear your thoughts on this! via /r/intermittentfasting https://ift.tt/2JCyMed https://ift.tt/eA8V8J