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18h fast before blood test

Answered on August 19, 2014
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?

Medium avatar

(10663)

on May 20, 2012
at 04:17 AM

My guess is trigs and cholesterol levels may be elevated.

64433a05384cd9717c1aa6bf7e98b661

(15236)

on May 19, 2012
at 11:28 PM

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

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3 Answers

1
B23318c968ac589b87131d5b489d6e16

(1294)

on 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.

64433a05384cd9717c1aa6bf7e98b661

(15236)

on May 19, 2012
at 11:28 PM

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

1
68294383ced9a0eafc16133aa80d1905

(5795)

on May 19, 2012
at 03:27 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.

0
B3173217a49b5b0116078775a17eb21d

(11488)

on 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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