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18h fast before blood test

by (15226)
Updated about 18 hours ago
Created May 19, 2012 at 2:44 AM

Usually people fast ~12h before getting blood drawn for lab tests. Today, due to a variety of unforseen circumstances I went had mine done after an 18h fast. I finished eating around 530pm last night and although the test was supposed to be at 9am, I didn't get the blod drawn until about 1130.

What affects, if any, might this have on my results?

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10653 · May 20, 2012 at 4:17 AM

My guess is trigs and cholesterol levels may be elevated.

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15226 · May 19, 2012 at 11:28 PM

what will be elevated? Glucose, yes. Anything else?

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3 Answers

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1294 · May 19, 2012 at 10:13 PM

If anything it will be sightly elevated, your body starts to access its own glucose stores and blood sugar levels rise. Smart body.

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15226 · May 19, 2012 at 11:28 PM

what will be elevated? Glucose, yes. Anything else?

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5775 · May 19, 2012 at 3:27 AM

I did it for about 20 hours prior to my last blood panel. It was around 3 PM. My fasting glucose was 101, which is slightly elevated.

However, everything else was nearly perfect.

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11478 · June 02, 2012 at 10:33 PM

As a T2 diabetic that regualarly tests my BG during an IF, I doubt whether it will make any difference.

There is always a bit of variation in the readings from hour to hour as your liver drips glucose into your bloodstream, but unless you overly exert yourself and cause a huge liver dump before the test I doubt it will make any difference. Your metabolism is quite good a conserving glucose when it needs to.

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