I recently went in for blood work in preparation for my 6 month post GB appt. The results came back normal except my Vitamin D and B12 values are very high - higher than the recommended levels. This surprises me because I thought after a gastric bypass I would have trouble absorbing. I have been on Vitamin D supplements for years and have always had a lower than normal level. I have never taken a B12 supplement but do take my bariatric Multivitamin. I had a note to stop taking the vitamin D immediately. Is this normal?

Do you do B12 shots? I just had the same bloodwork done in preparation for my six month visit too, and my B12 was too high. But I had just gotten my monthly B12 shot that morning.

No, I have never had a shot or B12 supplement (other than what is in my multivitamin).

Vitamin D is stored in fat, I think the levels go up when you loose weight. You should stop taking it as it as high vit D levels can cause hypecalcimia. Vit B12 fluctuates quickly don't take it for 24 hours before your recheck.

Low Vitamin D is epidemic in the NW especially from the beginning of October to the end of September.

I had to be on prescription mega doses twice in the past five years even though I take 100mg a day with 500mg of Calcium. Mine was lowish in partial when I had my first bariatric labs and pre op but normal now.

At my first 6 months check up my B12 was too high but not too high to take me off. then at 12 months post op it was so high that they took me off for 6 months.

B1 however was low which can be a problem so I started taking a B1 Vitamin in place of my B12.

I think it takes time to regulate during weight loss.

I've heard a lot of people mention high B12. I don't think it's dangerous, though. When mine got up above 2000, the PA at my surgeon's office had me do half doses. I think mostly because it was a waste of money taking them when it was already sky high. Usually high B12 isn't a problem, though. There are some people on another forum I'm on who like it when theirs is 1000 or higher because they claim they feel better. Mine has always been above 1000 (or at least since I started testing), so I have no clue how I would feel if it were less than that.

Edited December 15, 20169 yr by catwoman7

Thanks for the feedback. I'm going to keep taking my bariatric Vitamin until told otherwise. It will be interesting to hear what they say at my next appt. I don't eat seafood or soy but have been having more red meat since surgery.

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My Dr told me our B vitamin stores take approx 10 months to deplete....without vitamin supplements.

Just had my six month appt. The nurse said it was because my fat was blocking my absorption and without the fat ...

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At my first 6 months check up my B12 was too high but not too high to take me off. then at 12 months post op it was so high that they took me off for 6 months.
B1 however was low which can be a problem so I started taking a B1 Vitamin in place of my B12.
I think it takes time to regulate during weight loss.

Can I ask you what you learned about having low Vitamin B1? I just got my test result for B1 this week and mine is very low! I do not see my surgeon for a month but wanted to reach out in the forum. Thanks for any information =)

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