I am not sure what you mean by "Creatinine for Alcohol testing"??
Are you talking about the test for serum creatinine to look at kidney function?
What other medical problems do you have?
Your body would not process creatinine differently, and there is no test to show this.
You can, however do a Urinalysis and look at the sodium level and the specific gravity to look for dilution.
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Measuring serum creatinine is a useful and inexpensive method of evaluating renal dysfunction. Creatinine is a non-protein waste product of creatine phosphate metabolism by skeletal muscle tissue. Creatinine production is continuous and is proportional to muscle mass.
Creatinine is freely filtered and therefore the serum creatinine level depends on the Glomerular Filtration Rate (GFR). Renal dysfunction diminishes the ability to filter creatinine and the serum creatinine rises. The GFR is a measure of your kidney's ability to work.
Decreased Creatinine levels may be seen in: the elderly, persons with small stature, decreased muscle mass, or inadequate dietary protein. Muscle atrophy can also result in decreased serum creatinine level.
Low creatinine may just mean that your kidneys are working well, not that your blood is diluted.
A Urinalysis is a lab test of your urine. The specific gravity will show how dilute the urine is.
Urine sodium is a separate test and it is also an indication of dilute urine.
Unfortunately, if you are drinking a lot of fluid at work, this test may show that your urine is dilute anyway.
How do I get documentation that I am in one of the categories below?
It is not my blood - it is a urine test?
There is no "documentation" that you are in one of those categories. A doctor can say that this is what they suspect to be the cause of your low creatinine, but you would have to have a lot of muscle loss for this to be the case.
Creatinine levels are a blood test.
There is a blood test for creatinine.
You can test Albumin and pre-albumin levels to look for malnutrition and low protein.