Consuming too much caffeine can have various health effects, including increased heart rate, anxiety, insomnia, digestive issues, and dependency. High caffeine intake can lead to increased blood pressure and exacerbate stress or anxiety symptoms, significantly affecting daily life. It can also disrupt sleep patterns, leading to fatigue that's counterproductive for overall health and fitness. Additionally, excessive caffeine may cause dehydration, impacting athletic performance. Moderation is key; understanding personal tolerance levels can help individuals enjoy the benefits of caffeine—like improved focus and energy—without experiencing adverse effects.