A new study has found that consuming over 400 milligrams of caffeine per day can increase the risk of cardiovascular disease, even for otherwise healthy individuals. Researchers have found that regular caffeine consumption may disturb the parasympathetic system, leading to elevated blood pressure and heart rates. The study involved 92 healthy adults between the ages of 18 and 45 who consumed various amounts of caffeine daily and were monitored for changes in blood pressure and heart rate following a step test.
Nearly 20% of the participants in the study consumed over 400 mg of caffeine daily, which is equivalent to about four cups of coffee, 10 cans of soda, or two energy drinks. Chronic daily consumption of this amount of caffeine was found to raise heart rate and blood pressure over time, indicating potential cardiovascular risks. The study findings were presented at the American College of Cardiology conference in Delhi, India. The US Food and Drug Administration has stated that 400 mg of caffeine a day is generally not associated with dangerous effects, but some individuals may be more sensitive to caffeine and may metabolize it at different rates.
According to the Mayo Clinic, up to 400 mg of caffeine appears to be safe for most healthy adults. Caffeine is a stimulant that can increase the production of stress hormones, raise heart rate, and blood pressure by narrowing blood vessels. However, research has shown that caffeine may have other health benefits, such as elevating mood and lowering the risk of certain cancers. In the study, urban women in business and management roles had the highest daily caffeine intake, with those consuming over 600 mg of caffeine a day experiencing significantly elevated heart rates and blood pressure after a rest period following a step test.
Regular caffeine consumption can have long-term effects on the autonomic nervous system, putting otherwise healthy individuals at risk of hypertension and other cardiovascular events. Hypertension, or high blood pressure, is a condition associated with a higher risk of coronary artery disease, heart failure, chronic kidney disease, and dementia. Experts recommend regular exercise, a healthy diet, and weight management to help reduce blood pressure. In cases where lifestyle changes are ineffective, medications may be prescribed to manage hypertension and reduce the risk of heart disease and other related conditions. Increasing awareness of the risks associated with excess caffeine consumption is crucial for improving heart health and overall well-being.
