fasting blood sugar testThe fasting blood sugar test will actually tell you more about your risk of heart disease than your cholesterol profile. Are you surprised?

Don’t be! While this is not a “cholesterol test,” it IS an important marker for heart disease risk!

Sugar is intimately involved with inflammation, and as we know, it is inflammation that is the real culprit in heart disease, cholesterol is just along for the ride!

According to Dr. Mark Houston associate professor of medicine at Vanderbilt University, for every additional point above 75 on your fasting blood sugar reading, your risk of heart disease goes up!

This is due to the fact that high blood sugar levels in your blood are an independent risk factor for cardiovascular disease.

The impact of elevated blood glucose levels

Sugar is a killer, a serial killer, where your health is concerned. Medical science is just now starting to figure out how damaging sugar can be in your system when the levels are high.

There are a number of reasons for this:

  • High blood sugar causes increased insulin (which is a pro-inflammatory hormone)
  • Elevated sugar levels make your blood more acidic and it tends to clot more readily
  • Sugar causes stiffening of arteries and blood vessels
  • Sugar decreases the oxygen carrying capacity of your blood
  • Nitric oxide is vital for heart health and high sugar levels lower it
  • High sugar levels also cause glycation which is a hardening of tissues in your heart and arteries

For all the reasons above, it’s important to know what your blood sugar levels are, so that if they are high, you can make the necessary changes that will bring the level down and reduce your risk of heart attacks, strokes, and high blood pressure.

How is the test performed?

A fasting blood sugar test, which is also called a fasting plasma glucose, or FPG test, measures your blood glucose level after you have fasted for at least 8 hours.

It’s a very accurate test, and does not vary by age or how physically active you are. It tends to be a physician favorite because it’s easy to do, cheap, and you get the results relatively fast.

The test is done first thing in the morning (so you can get the results by the afternoon), after at least an 8 hour period with no food, and nothing to drink but water.

A nurse or physician assistant will draw your blood and send the sample to the lab. When the results come back your doctor will discuss with you what the results mean, in terms of your risk for both heart disease and diabetes.

Levels for these tests are expressed in “millgrams per deciliter” (a deciliter is one 10th of a liter). Thus a reading of 100mg/dl is read as 100 milligrams per deciliter.

The threshold for normal fasting sugar levels should be below 100mg/dl, but some experts, most notably Dr. Mark Houston, feel the safe level is 70 -75 mg/dl!

What do the scores mean?

Doctors use what are called “reference ranges” to determine exactly what these tests indicate. All of this is of course relative to the results taken of sample populations to determine what is statistically healthy and what is not.

There are cut off points beyond which a clinical diagnosis is made, and these would appear to be splitting hairs so to speak, but of course the line must be drawn somewhere.  Whatever the result, you will have a much better idea of where you stand, and what you have to do to protect your health in the long term.

If your blood sugar measures between 100 mg/dl to 125 mg/dl, the doctor will probably order a follow-up test to eliminate error. This test result indicates “pre-diabetes” and your doctor may want to discuss steps you can take to bring your sugar levels down and prevent diabetes.

If you score 126mg/dl or above, the doctor will want to test you again to eliminate the chance of some anomaly that might have caused an inaccurate reading. If a follow-up test scores the same result, this will confirm that you are diabetic!

Of course it may seem silly to say that if your result on this test is 125mg/dl you don’t have diabetes and at 126 mg/dl you ARE diabetic, but they had to make a cut off point somewhere.

What is important is that if you are in the range 100-125 you need to make changes to your nutrition and exercise habits to get your blood sugar down to healthy levels.

Insulin is a factor too!

When your blood sugar levels spike, your body produces insulin to lower the sugar level. So if your fasting blood sugar test indicates higher than normal blood sugar levels, you can be sure your insulin levels are high as well.

Insulin is a very pro-inflammatory hormone that causes a lot of problems in your body when it is chronically elevated. This is another reason why you would want to get your sugar levels down to what is considered healthy.

Insulin causes inflammation and damage to the endothelial lining of your arteries, which is how the process of atherosclerosis begins. Thus your sugar levels have a direct bearing on the development of heart disease.

Connection with heart disease

If your blood glucose levels are chronically elevated, a process called glycation comes into play, which causes tissues like the heart and blood vessels to lose elasticity and become stiff.

This stiffening process, along with the damage from inflammation, makes you susceptible to heart attacks, high blood pressure and strokes.

To make it really simple and clear, elevated blood sugar=heart disease! This connection is far more important than cholesterol which does not directly cause heart disease. High blood glucose levels are also a factor in many other chronic diseases as well.

The fasting blood sugar test, by measuring how high your blood sugar is on average gives you a clear indication that your risk for heart disease is elevated, which in turn gives you a chance to lower your risk and avoid heart disease, by bringing your blood sugar levels down.

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