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  #1   ^
Old Thu, Sep-22-05, 10:21
dina1957 dina1957 is offline
Registered Member
Posts: 1,854
Plan: My own
Stats: 194/000/150 Female 5'5"
BF:Not sure
Progress: 441%
Location: Bay Area
Default BUN test

Hi All,
I just got my bloodwork done, and while my creatinine is 0.7 (<1.2 range), BUN was 18 (10-20 range). Is it because of 12 h fast or should I be concern?
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  #2   ^
Old Sat, Sep-24-05, 22:04
cindy_cfid cindy_cfid is offline
Senior Member
Posts: 371
Plan: Atkins
Stats: 280/188/150 Female 66"
BF:Day37=2"loss belly
Progress: 71%

I also had the same lab result & my doctor said it was not a concern but a sign of dehydration probably caused by the fast. I would think that since carbs make us hold so much more water weight, that low carbing would make you stay slightly dehydrated.
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  #3   ^
Old Sun, Sep-25-05, 08:54
Lisa N's Avatar
Lisa N Lisa N is offline
Posts: 12,028
Plan: Bernstein Diabetes Soluti
Stats: 260/-/145 Female 5' 3"
Progress: 63%
Location: Michigan

Dina, according to this article your creatinine levels are what doctors look at when considering kidney function and since yours are well within normal range, you probably don't have to be too concerned with the BUN being at the high end of normal.
If your creatinine levels started climbing along with the elevated BUN, then you would probably have cause for concern.
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  #4   ^
Old Sun, Sep-25-05, 20:46
dina1957 dina1957 is offline
Registered Member
Posts: 1,854
Plan: My own
Stats: 194/000/150 Female 5'5"
BF:Not sure
Progress: 441%
Location: Bay Area

Thanks for the replies. I was too guessing that a slight dehydration (overnight fast with no water before test) could cause it. Next time I will try random BUN test without fasting.
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  #5   ^
Old Mon, Sep-26-05, 18:49
kebaldwin kebaldwin is offline
Thank you Dr Atkins!
Posts: 4,146
Plan: Atkins induction
Stats: 311/250/220 Male 6 feet
Progress: 67%
Location: North Carolina

High BUN for low carbers is normal because of the high amount of protein in your diet.

BUN concentrations may be elevated when there is excessive protein catabolism (breakdown), significantly increased protein in the diet, or gastrointestinal bleeding (because of the proteins present in the blood).
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