How does caffeine affect blood pressure?
Caffeine is a mild stimulant found in coffee, tea, chocolate and many soft drinks. Too much caffeine can cause nervousness and jitters. It may also increase your blood pressure. The amount of caffeine in two to three cups of coffee can raise systolic pressure 3 to 14 millimeters of mercury (mm Hg) and diastolic pressure 4 to 13 mm Hg in people without high blood pressure. Among people who don’t consume caffeine on a regular basis, caffeine can cause a temporary but sharp rise in blood pressure. Exactly what causes this spike in blood pressure is uncertain. Some researchers suggest that caffeine narrows blood vessels by blocking the effects of adenosine, a hormone that helps keep them widened. Caffeine may also stimulate the adrenal gland to release more cortisol and adrenaline, which cause your blood pressure to increase. Observational studies can be confusing. Some research has found that people who regularly drink caffeine have a higher average blood pressure than those who drink non
Caffeine is a mild stimulant found in coffee, tea, chocolate and many soft drinks. Too much caffeine can cause nervousness and jitters. It may also increase your blood pressure. The amount of caffeine in two to three cups of coffee can raise systolic pressure 3 to 14 millimeters of mercury (mm Hg) and diastolic pressure 4 to 13 mm Hg in people without high blood pressure. Related Articles • 10 ways to control high blood pressure without medication » More prevention Articles Among people who don’t consume caffeine on a regular basis, caffeine can cause a temporary but sharp rise in blood pressure. Exactly what causes this spike in blood pressure is uncertain. Some researchers suggest that caffeine narrows blood vessels by blocking the effects of adenosine, a hormone that helps keep them widened. Caffeine may also stimulate the adrenal gland to release more cortisol and adrenaline, which cause your blood pressure to increase. Observational studies can be confusing. Some research has foun
Caffeine is a mild stimulant found in coffee, tea, chocolate and many soft drinks. Too much caffeine can cause nervousness and jitters. It may also increase your blood pressure. The amount of caffeine in two to three cups of coffee can raise systolic pressure 3 to 14 millimeters of mercury (mm Hg) and diastolic pressure 4 to 13 mm Hg in people without high blood pressure. It isn’t clear how caffeine increases blood pressure. Some research has found that people who regularly drink caffeine have a higher average blood pressure than those who drink none. Other research has suggested that regular consumers of caffeine develop a tolerance to it — and as a result, caffeine doesn’t have a long-term effect on their blood pressure. In another twist, a 12-year study of 155,000 women found that drinking caffeinated cola may be associated with an increased risk of high blood pressure. However, the same causal relationship was not found with caffeinated coffee. In fact, the study suggested that wom
