The American Heart Association (AHA) has published a scientific statement reviewing caffeine’s safety profile in existing research. It linked consuming up to 400 mg of caffeine per day to potentially lowering the risk of multiple cardiovascular conditions, including stroke, heart failure, and heart disease. However, exceeding that caffeine threshold may result in irregular heart rhythm and increased blood pressure. Energy drinks are examples of such drinks that contain high caffeine levels and may therefore bring negative health effects on cardiovascular health, warns the organization.