How Too Much Caffeine Could Affect Your Heart Health?
Caffeinated drinks, like coffee and tea and some energy drinks are very popular worldwide. However, while these beverages may provide a quick energy boost, consuming them in excess can have harmful effects on heart health. A new study held in New Delhi, India, highlights the potential risks of chronic caffeine consumption.
The study, led by Dr. Nency Kagathara from Zydus Medical College and Hospital, India, suggests that regularly consuming over 400 mg of caffeine per day could increase the risk of cardiovascular issues, even in healthy individuals. According to Dr.Kagathara “Regular caffeine intake may disrupt the parasympathetic nervous system, causing spikes in blood pressure and heart rates”. The research aimed to explore how long-term caffeine use affects heart rate and blood pressure recovery.
For the study, chronic caffeine consumption was defined as the intake of caffeinated beverages like tea, coffee, and sodas at least five days a week for over a year. Researchers analyzed 92 healthy adults, aged 18 to 45, with normal blood pressure. The participants underwent a simple three-minute step test, after which their blood pressure and heart rate were monitored at one and five-minute intervals. In addition, researchers collected data on each participant’s daily caffeine intake and lifestyle habits.
The findings revealed that nearly 20% of the participants regularly consumed over 400 mg of caffeine per day—equivalent to four cups of coffee, ten cans of soda, or two energy drinks. These high caffeine consumers showed significant increases in heart rate and blood pressure over time, indicating an impact on the autonomic nervous system.
Interestingly, those with the highest caffeine intake were more likely to be women, working in business or management roles, and living in urban areas. Participants who consumed more than 600 mg of caffeine daily showed particularly concerning results, with significantly elevated heart rates and blood pressure even after five minutes of rest.
“Excessive caffeine intake could put otherwise healthy individuals at risk for hypertension and other cardiovascular conditions,” warns Dr. Kagathara. “It’s crucial to raise awareness about these risks to encourage better heart health.”
Hypertension, or high blood pressure, is a major risk factor for serious conditions like coronary artery disease, heart failure, kidney disease, and even dementia. While caffeine plays a role, other factors, including alcohol consumption, smoking, age, family history, and diet, also contribute to high blood pressure. Fortunately, lifestyle changes, like increasing physical activity and eating a balanced diet, can help manage and reduce the risk of heart disease.
The safe daily limit for caffeine to avoid heart health risks is 400 mg, which equates to about four cups of coffee, 10 cans of soda, or two energy drinks. Consuming more than this regularly can elevate blood pressure and heart rate, increasing the risk of cardiovascular issues, even in healthy individuals. For those who want to enjoy caffeine without compromising heart health, it’s best to keep intake within this limit.