posted on Sep, 17 2005 @ 08:30 AM
Direct from our friends at the American Heart Association:
In 90 to 95 percent of high blood pressure cases, the cause is unknown. In fact, you can have high blood pressure for years without knowing
There are a few studies which indicate that caffeine can indeed raise blood pressure, though the raise seems to be only temporary.
There's one mentioned here
(from this source)
The caffeine in drinks like coffee, tea and sodas may cause blood pressure to go up, but only temporarily. In a short time your blood pressure
will go back down.
If you eat a meal that's very high in salt, then your bp will probably rise, too - again though, this is only temporary.
It really depends on your individual physiology, and whether or not you have high bp to begin with.
Stress is notorious for raising your bp, too...once again, it might just be a temporary rise, as there really haven't been enough studies to prove
this is a permanent cause of high bp.
The thing is, if your bp keeps fluctuating in this way - frequent but marked rising and falling - you're going to be at much greater risk of
something permanent developing; it's a good idea to try and keep your bp nice and regular. And low (but not dangerously so).
Hope this helps a bit