A recent study has just announced that it is acceptable to have blood pressure that is 140/80, which was considered dangerous before. The conclusion was made because there were no more deaths in this group of patients compared with patients who had 120/80 or less blood pressure. 
Patients were followed for two decades. Basically the conclusion implies that because you didn’t die, it must be OK.
But what about other conditions like dementia, nonfatal strokes, nonfatal heart attacks, etc?  These issues the study did not take into consideration. Does it mean that if you are not dead, the rest does not matter?
Causes of so called essential hypertension (essential means that the cause is not known) or prehypertension:
Electrolyte imbalance.
Insulin insensitivity.
Heavy metal toxicity.
How do we deal with this problem? Find a holistic doctor to find the root cause.
Practical tips to lower your blood pressure quickly:
Lose weight.
No added salt. Instead eat plenty of organic fresh fruits and vegetables, rich in potassium and plenty of organic greens rich in magnesium.
Get checked for heavy metal toxicity. Cilantro, Chlorella and vitamin C are good to help you detoxify from heavy meals like mercury, lead,  etc.
References: 
http://www.springer.com/about+springer/media/springer+select?SGWID=0-11…
http://www.vegsource.com/articles/goldhamer_high_pressure.htm