Good discussion here. It sounds like some IF studies have had positive effects even if the participants are taking black coffee, however, the caveat is that the

Good discussion here. It sounds like some IF studies have had positive effects even if the participants are taking black coffee, however, the caveat is that they don't know whether not having black coffee would be more beneficial. https://www.foundmyfitness.com/episodes/coffee-and-amino-acids-effect-on-fasting-rhonda-patrick https://www.foundmyfitness.com/episodes/coffee-and-amino-aci...