Will supplementing before tests for gastric parietal cell and intrinsic factor antibodies affect the result?

i suspect that I may have low stomach acid for various reasons; previous B12 tests have shown low-normal levels. I have been supplementing with 1000mcg sublingual tablets a day and have seen an improvement.

My GP is amenable to testing for gastric parietal cell and intrinsic factor antibodies. Should I stop taking my B12 tablets before testing? Would the results be affected by taking them close to the test?

Many thanks


2 Replies

  • I believe its best to have at least 5 days clear of B12 supplementing before having IF abs test, not sure about gastric parietal cell antibodies.

  • Thanks, Marre. I'll lay off the tablets until the other side of the weekend to make sure.

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