vitamin b12 injections are indicated for a patient diagnosed with Out of Stock - (Generic) Injectable Solution, 1000-mcg/mL, 100-mL vial - Easy Refills Diagnosis, Treatment and Long-Term Management

Toxicity is extremely rare, but injections should still be given under professional guidance

10.1136/bmjopen-2013-004501 28 JadadA

Other GLP-1 and dual-agonist agents, including tirzepatide, are also in wide use, though not every GLP-1 on the market carries an FDA weight loss indication

Since B12 is found primarily in animal products, including meat, fish, dairy, and eggs, a substantial reduction in food intake can reduce B12 consumption below optimal levels, particularly for patients who were already borderline deficient before starting treatment or whose diets lean toward plant-based foods

For example, the highly toxic methylmercury is produced by the action of methylcobalamin