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A member asked:
When does the intrinsic factor return back again after gastric sleeve. and can i get vit b12 from pills after gastric sleeve by 1 year?
2 doctors weighed in across 2 answers
The best way to objectify: obtain blood tests for Vit B-12 and MMA about every 3-4 months, but in the meantime, follow your doctor's advice.
Answered 9/24/2023
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It was long felt that,unlike gastric bypass, gastric sleeve didn't affect intrinsic factor function, but more recent studies showed that it does & results in B12 & iron deficiency. Taking sublingual B12 tablets will obviate B12 deficiency. I believe that some iron can still be absorbed without intrinsic factor. The gastric sleeve causes long-term intrinsic factor deficiency though.
Answered 9/24/2023
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