The connection between caffeine consumption and high blood pressure is not well understood, but there is ample evidence to indicate that if you have hypertension, coffee and other caffeinated drinks and foods can ex­acerbate your condition. Caffeine is a drug, and while it's entirely legal and widely consumed, it can have a powerful effect on your individual physiology. If you want to eliminate caffeine from your diet, try to do it gradually over a period of days or even weeks in order to avoid withdrawal symptoms like headaches.
In the United States in 2013, high blood pressure resulted in almost 1,000 deaths every day, according to the Centers for Disease Control and Prevention (CDC). Unfortunately, the first sign may be a stroke or a heart attack, because about one in five U.S. adults with high blood pressure don't know they have it until it seriously damages the heart or weakens blood vessels in the brain.
Diabetics often have lower recommendations for blood pressure, the maximum normal value being seen as 130/80-85. However, it’s questionable whether it’s a good idea to medicate your blood pressure levels down to those values. Diabetics can probably stick to approximately the same upper limit as people with heart disease: 140/90 (according to new studies and expert comments, as well as the latest recommendations from the American Diabetes Association, ADA).
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