Array ( [actionDate] => 2008-12-11 [displayText] => Passed/agreed to in Senate: Resolution agreed to in Senate without amendment and with a preamble by Unanimous Consent.(text as passed Senate: CR S10958) [externalActionCode] => 17000 [description] => Passed Senate )
If you increase the amount of fruits and vegetables in your diet, you will also lower your blood pressure. Coffee contains caffeine which is a stimulant and can cause your blood vessels to contract and increase your blood pressure. However, this amount is small, and may or may not be significant.
Caffeine can cause a short, but dramatic increase in your blood pressure, even if you don't have high blood pressure. It's unclear what causes this spike in blood pressure. Some researchers believe that caffeine could block a hormone that helps keep your arteries widened. Others think that caffeine causes your adrenal glands to release more adrenaline, which causes your blood pressure to increase.