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If there is, this indicates that youve hit a blood vessel very unlikely when injecting into the stomach but this step is a recommended precaution

Without adequate stomach acid, b12 remains bound to food proteins and passes through the digestive system unabsorbed

Ann N Y Acad Sci

They keep an eye on how the patient is doing and adjust the dose as needed

Vitamin B12 is essential to the creation and regeneration of red blood cells, also known as hemoglobin, which transport oxygen and nutrients throughout your body to other cells

doi: 10.1371/journal.pone.0051152
