Shhhh, that could send the wrong message to the children. Studies showed that fears of caffeine-related heart problems were unfounded. Caffeine can raise blood pressure in unaccustomed drinkers, but once they adapt, their pressure returns to normal. However, if you are a middle-aged man with high blood pressure, there are indications that three cups or more a day could lead to stroke. Percolating is probably OK because the grounds are packed in tight and the bad substances are filtered out through multiple passes of the water.
Coffee can upset some people's stomachs.
Higher levels of consumption have been thought to thin bones slightly, but the most recent study failed to confirm that concern. It's a draw for now. Coffee is not good for people with panic attacks and major anxiety. If you have frequent heart palpitations, think about switching to a non-caffeinated drink. And while coffee once was thought to be linked to pancreas, bladder, and breast cancer, the latest evidence finds no connection.