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Gastric acid and pepsin in the stomach release B12 from these dietary proteins, allowing it to bind with R-proteins (haptocorrins) secreted in saliva
Leaking of injection fluid can cause a persistent discoloration of skin
If you do, in fact, have a B12 deficiency, injections of the vitamin will reduce the following symptoms and restore your energy as well as your metabolism
Endocr Rev
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