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Not having enough Vitamin B12 can lead to thrombocytopenia

Now, Johnson says he has been diagnosed with autoimmune gastritis (AIG), a chronic autoimmune disease in which the immune system attacks the stomach's acid-producing parietal cells, reducing stomach acid and impairing vitamin B12 absorption, according to Nature Reviews Disease Primers

Funding This paper was supported by San Matteo Hospital Foundation, Internal Medicine research fundings, PRIN2017. Publishers note All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers

Why Supplement Vitamin B12