Basics

Effects of Caffeine on Blood Pressure

What is Caffeine? Caffeine is found to be a CNS (Central Nervous System) stimulant often used to ward off the feeling of drowsiness. It is beneficial in the restoration of alertness after a hectic schedule. It is a xanthine alkaloid compound that is found commonly in beverages such as coffee, tea and aerated drinks. It is believed to be the most consumed psychoactive substance, worldwide. Caffeine increases the effect of the glucagon and adrenaline hormones and thereby releases sugar stored in the liver thus causing a release of high blood sugar.

Caffeine is scientifically proven to raise the Camp (cyclic AMP) levels in the cells of the heart and diffuse them followed by activating protein kinase A (PKA). The raised activity of PKA raises the degree of responsiveness of cardiomyocytes to the heart beat controlling calcium currents.

Caffeine has always been a subject of controversies regarding its usage and side-effects. Previous studies have showed that the intake of Caffeine is likely to have a negative impact on the level of blood pressure besides posing a threat to the normal functioning of the body. This led to the birth of the myth that Caffeine leads to raising of the blood pressure. Caffeine was believed to affect lipid and cholesterol levels of the body, blood pressure, stress levels, arrhythmias and homocysteine thereby raising the risk of diseases of the heart.

Is Caffeine harmful to your blood pressure? According to a recent BBC study, Caffeine is found to have no affect on the blood pressure unless consumed in high quantities. It does not seem to affect the blood sugar level in the body when taken in moderate quantities. As per the recent Blood Pressure Association study, Caffeine does not pose a threat to the level of blood pressure as much as other commodities such as salt do.

Decaffeinated coffee may be consumed as a great substitute for those who do not want to be deprived of the pleasure of Caffeine consumption. Caffeinated drinks can actually protect you against the diseases of the heart. But, the amount of caffeine consumption must not exceed 300mg per day.

However, people suffering from hypertension and people who are in a pre-hypertensive state are advised not to consume Caffeine.

Therefore, Caffeine does not threaten the blood pressure in a human being unless consumed in unwarranted quantities. It can therefore be used as a stimulant for the purpose of keeping away drowsiness and fatigue.