Coffee... I have one almost every day. Starbucks is my jam! Seriously- it's the only way I get anything done! Otherwise…

Coffee...

I have one almost every day. Starbucks is my jam! Seriously- it's the only way I get anything done! Otherwise I feel tired/sluggish and cant keep up with my 1 yo. He's constantly making a MESS and I'm tired!!! ? All that being said, why do they advise against too much coffee? My doctor says a cup is okay. But I'm pretty sure I'm getting more than the amount of caffeine considered "okay" in a macchiato ?