[Jtsummers]

Not the GP, but a couple major health issues with high caffeine intake are:

- high blood pressure

- high heart rate

With no other health issues (i.e., no underlying heart issues or cardiovascular issues in general) those may not be problematic (in the sense that they'll cause you long term or immediate harm). However, if you already have HBP or cardiac issues, cutting out or reducing caffeine can be a critical step towards better health or at least not worsening the condition.