Perennial used coffee grounds for objections is: it can make blood pressure rise. High blood pressure can not be taken lightly, it will let you in the risk of stroke and heart attack.

According to foreign media reports, the fact is that coffee does not increase the risk of high blood pressure. Italy researcher Dr Giuseppe Grosso says it will only let you finish it within a few hours of blood pressure there will be bumps – and only for people who rarely drink coffee.

If your body is not used to caffeine, the chemical reaction will cause the narrowing of blood vessels. But a few hours after the vessel will return to normal, effects will gradually disappear. If you are drinking coffee is more than a month, your body will build up tolerance, blood pressure will also be affected, Prediman Krishan says Dr Shah.

For most people, blood pressure transient effects are harmless. Even people who have high blood pressure 1-2 cups of coffee a day is safe.

More importantly, Dr Shah said the temporary high blood pressure does not affect future risk of developing chronic high blood pressure.

In fact, Grosso's research shows that, as long as you don't smoke, 3-4 cups of coffee a day were in fact than not coffee drinkers have a lower risk of developing hypertension. This may be because the coffee is rich in other blood pressure lowering of potassium, magnesium, and antioxidants.

Other studies have shown that coffee may significantly reduce your risk of diabetes, kidney stones, the risk of multiple sclerosis and certain cancers. Not to mention its ability to resist fatigue. So, drink coffee!