What is a normal CEA?

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Normal range is <2.5 ng/ml, a smoker can have higher CEA value, < 5ng/ml is considered acceptable for a smoker.

An elevated CEA doesn't mean cancer exists. Inflammation can cause slight elevation of CEA as well. However, if you have an elevated CEA, make sure you follow up with your doctor, just in case.

Early detection is the best treatment for cancer.
What mean when is normal?
A normal CEA test indicates that your treatment for cancer (if there's any) has worked or you may have no cancer in the first place, but that does not rule out the possibility of cancer.
after my Colon Surgerie my CEA Level is now 7.5  is this Normal
Usually, for adult nonsmokers, the normal CEA levels range from 0 to 2.5 mcg/l. For adult smokers, the levels are slightly higher, and normal levels range from 0 to 5.0 mcg/l.

Generally CEA would be higher in patients with colon cancer. After surgery, the value would decrease, and the increase of CEA would raise the possibility of cancer recurrence. Your level of 7.5 is higher than normal, but if it is lower than the value before surgery, then it would be totally normal.
I found many sites say the normal result is 3.0 ng/mL or lower.
64 is that a high car level
CEA is a protein marker indicative of several types of cancers, especially colon cancer. The CEA normal levels are different for smokers and nonsmokers. Usually, for adult nonsmokers, the normal CEA levels range from 0 to 2.5 mcg/l. For adult smokers, the levels are slightly higher, and normal levels range from 0 to 5.0 mcg/l. This difference in normal values is because smokers usually produce more CEA than nonsmokers. However, nonsmokers, who are constantly in close contact with secondhand smoke may also have high CEA levels, without really having any kind of cancer.

Yours is very high and you should see a doctor.
How high can a Cea level get to
A carcinoembryonic antigen (CEA) test is a blood test used to help diagnose and manage certain types of cancers. You doctor can also use the test results to help determine if a cancer treatment is working.

The normal values ranges differ from one lab to another,  but the most popular CEA blood test normal range is from 0 to 2.5 micrograms per liter. A little bit higher  than this are accepted as normal. However, if the CEA values are considerably higher, further testing may be prescribed by the doctor to look for possible cancerous growths in the various parts of the body.
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