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Low Acid Production in the Stomach With a lack of acid in the stomach, the body is unable to properly absorb nutrients from food
Funding The authors declare that no financial support was received for the research and/or publication of this article
The FDA label includes a boxed warning regarding thyroid C-cell tumors observed in rodent studies, contraindicating use in patients with personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2
Injection site redness (mild, transient) Minor swelling at injection area Occasional headache Mild nausea (typically resolves) Fatigue during initial days Sleep changes (some report disturbance, others improvement) Increased appetite Vivid dreams Temporary digestive changes Sleep effects vary considerably among users
How quickly do you feel better after B12 injections
A change in a methyl-donor pool is not automatically beneficial and may vary between tissues
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