I wonder if the coffee Sara Bareilles drinks hurts her attention span or focus

I am just saying this from personal experience, because whenever I drink large amounts of coffee for an extended period of time, I tend to lose my short-term memory. Very noticeable in conversations with people in which I can hear what they are saying, but unable to comprehend the words they are speaking. It recovers when I eat some red meat though. Maybe the caffeine depletes the zinc and b12 from our bodies causing the decreased brain function. I wonder if she has an issue with this. I know women's bodies are different, so I can only speculate. In her case, maybe the coffee unlocks the creativity by shutting down another part of the brain?