One ingredient in many popular drinks, hot as well as cold ones, makes it virtually impossible for your blood pressure to be measured accurately.
It also renders blood pressure treatments, natural as well as synthetic, substantially less effective.
The good news is, if you drink it in the right way, there is no harm.
In a landmark research from Western University and Lawson Health Research Institute in London, and published in the American Journal of Hypertension, the long lasting debate about caffeine and blood pressure got a new twist.
They asked 13 people with normal blood pressure to abstain from caffeine -containing products for a week.
In the following three weeks, they gave them two 300 ml cups of black coffee (week 1), the maximum recommended dose of a common calcium channel blocker blood pressure treatment (week 2), and the coffee together with the felodipine (week 3).
From this, they drew the following conclusions:
1. After two days of no caffeine consumption, caffeine clears from your bloodstream, resulting in a high blood pressure spike when you consume it next. Blood pressure then remains raised for hours.
2. In the presence of caffeine, calcium channel blockers cannot decrease blood pressure as well as in its absence, probably because caffeine interferes with the ability of the drug to relax and widen blood vessels.
The first conclusion increases the likelihood that your doctor will diagnose you as suffering from hypertension when your blood pressure is actually normal. So if you only occasionally drink caffeine drinks, avoid them hours before your doctor’s visit.
Second, if you want to treat your blood pressure with drugs, you’ll need sky-high doses if you occasionally consume caffeine.
For those who control their blood pressure via natural dietary and lifestyle methods (which we, of course, recommend), it arguably means that natural methods will fail to keep your blood pressure normal for a few hours after caffeine intake.
The good news is that this study applies only to occasional consumers.
Researchers have long understood that caffeine spikes blood pressure, but they have also repeatedly concluded that regular consumption increases your tolerance of its effects, meaning that caffeine does not increase blood pressure in regular caffeine consumers.
This leaves you with two options, either drink one or two caffeinated drinks daily, or leave it alone completely.
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