Experts have revealed how caffeine affects blood sugar and blood pressure

Various studies show that coffee is good for health. Coffee may offer some protection against:

• Parkinson's disease;
• type 2 diabetes;
• liver disease, including cancer;
• heart attack and stroke.

For most young, healthy adults, caffeine has no noticeable effect on blood sugar. Up to 400 milligrams of caffeine per day is considered safe. However, it is important to note that some people are more sensitive to caffeine.

If you have diabetes, caffeine can affect how insulin works. Some people with diabetes experience negative effects after 200 mg of caffeine, which is equivalent to one to two 250 ml cups of black coffee. Therefore, limiting caffeine in the diet may be beneficial for diabetics.

The same can be said about the effect of caffeine on blood pressure. The blood pressure response to caffeine varies from person to person. Caffeine can cause a short-term but dramatic increase in blood pressure, even if you don't have high blood pressure. Scientists do not have a specific answer to the question of what causes this surge.

Some researchers believe that caffeine may block a hormone that helps the arteries widen. Others believe that caffeine causes the adrenal glands to release more adrenaline. Some people who regularly drink caffeinated beverages have higher average daily blood pressure.