the clinical relevance of this finding in humans is unknown, and in UK and EU prescribing information this is noted as a precaution rather than a formal contraindication but individuals with a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2 (MEN2) should discuss this with their doctor
Both are widely sold through research-chemical channels labeled not for human consumption, which means no license checked the buyer, no prescription was written, no compounding pharmacy touched the product, no one scheduled a follow-up, and no agency verified whats actually in the vial
Hyperpigmentation inside the mouth due to low B12 levels may appear as bluish or dark discoloration
While oral substitutes have shown some effectiveness according to studies, their ability to match the efficacy of intramuscular vitamin B12 remains uncertain
Comparing Oral, Sublingual, and Injectable Efficacy Vitamin B12 comes in oral, sublingual, and injectable forms
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