can b12 injections cause upset stomach Vitamin B12: Symptoms, Dosage & Toxicity Risks Intrinsic Factor: The Stomach Protein

24 Table 3 Estimated Sensitivity and Specificity of Serum Laboratory Tests for Vitamin B12 Deficiency Pernicious anemia refers to one of the hematologic manifestations of chronic auto-immune gastritis, in which the immune system targets the parietal cells of the stomach or intrinsic factor itself, leading to decreased absorption of vitamin B 12

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Low red blood cell counts (anemia) due to vitamin B12 deficiency

Central appetite regulation : GLP-1 receptors in the brain contribute to reduced appetite and food intake, supporting weight loss

Severe deficiency can contribute to fatty liver changes, which is one reason choline gets framed as liver support. Details are summarized in the NIH ODS Choline fact sheet for health professionals