ALL you need to know about bloodwork

You've had blood work done, and the doctor or his nurses are guarding the results as if they're state secrets. However, after much cajoling and explaining that you'd like to at least be an informed partner in your own health care, they eventually give you a copy of your lab tests.

The trouble is, as much as you've been posturing about how you've had more than a smattering of medical education, you still can't figure out what half the tests are for and whether or not those abnormal values are anything to worry about.

The following article contains the most common tests. I'll include why it's performed, what it tells you, and what the typical ranges are for normal humans. That way, you'll have something more to go on in assessing your health other than your family doctor saying, "Well, these few values are a little worrisome, but you'll probably be okay."

One note, though, before I get started. The values I'll be listing are merely averages and the ranges may vary slightly from laboratory to laboratory. Also, if there's only one range given, it applies to both men and women.

Lipid Panel — Used to determine possible risk for coronary and vascular disease. In other words, heart disease.


HDL/LDL and Total Cholesterol

These lipoproteins should look rather familiar to most of you. HDL is simply the "good" lipoprotein that acts as a scavenger molecule and prevents a buildup of material. LDL is the "bad" lipoprotein which collects in arterial walls and causes blockage or a reduction in blood flow. The total cholesterol to HDL ratio is also important. I went in to detail about this particular subject — as well as how to improve your lipid profile — in my article "Bad Blood".

Nevertheless, a quick remonder: your HDL should be 35 or higher; LDL below 130; and total to HDL ratio should be below 3.5. Oh and don't forget VLDL (very low density lipoprotein) which can be extremely worrisome. You should have less than 30 mg/dl in order to not be considered at risk for heart disease.

On a side note, I'm sure some of you are wishing that you had abnormally low plasma cholesterol levels (as if it's something to brag about), but the fact is that having extremely low cholesterol levels is actually indicative of severe liver disease.


Triglycerides

Triglycerides are simply a form of fat that exists in the bloodstream. They're transported by two other culprits, VLDL and LDL. A high level of triglycerides is also a risk factor for heart disease as well. Triglycerides levels can be increased if food or alcohol is consumed 12 to 24 hours prior to the blood draw and this is the reason why you're asked to fast for 12-14 hours from food and abstain from alcohol for 24 hours. Here are the normal ranges for healthy humans.

16-19 yr. old male
40-163 mg/dl

Adult Male
40-160 mg/dl

16-19 yr. old female
40-128 mg/dl

Adult Female
35-135 mg/dl


Homocysteine

Unfortunately, this test isn't always ordered by the doctor. It should be. Homocysteine is formed in the metabolism of the dietary amino acid methionine. The problem is that it's a strong risk factor for atherosclerosis. In other words, high levels may cause you to have a heart attack. A good number of lifters should be concerned with this value as homocysteine levels rise with anabolic steroid usage.

Luckily, taking folic acid (about 400-800 mcg.) as well as taking a good amount of all B vitamins in general will go a long way in terms of preventing a rise in levels of homocysteine.

Normal ranges:

Males and Females age 0-30
4.6-8.1 umol/L

Males age 30-59
6.3-11.2 umol/L

Females age 30-59
4.5-7.9 umol/L

>59 years of age
5.8-11.9 umol/L

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