How do different types of caffeine (coffee, tea, soft drinks, energy drinks) affect the human cardiovascular system?
All caffeine is created equal. The source may be different, but regardless of where it comes from, it behaves similarly in the body. Different drinks have varying levels of caffeine. For example, brewed coffee has about 85 mg of caffeine per cup, while some energy drinks can have many times this amount. Caffeine acts as a stimulant in the body. Caffeine consumption in moderation is acceptable. Most experts recommend no more than 300 mg per day. Overuse of caffeine can lead to irritability, anxiety, and trouble sleeping. Pregnant women, or women who wish to become pregnant, should consume caffeine only in moderation. Breastfeeding women should avoid caffeine, as it can pass into breast milk.
Caffeine may cause a slight, temporary rise in heart rate and blood pressure, especially in those who are sensitive to caffeine. However, there is no link to caffeine and high cholesterol, irregular heartbeat, or increased risk of cardiovascular disease. If you have high blood pressure, ask your doctor how much, if any, caffeine would be safe for you to consume.