vitamin d and vitamin b12 injection Supplemental Injections Vitamins Injections - Vitamins A,

Metformin-induced vitamin B12 deficiency can cause or worsen distal symmetrical, autonomic and cardiac neuropathy in the patient with diabetes

10.1245/s10434-011-1764-6 30 KorpetiA.ManousiN.KabirA.FurtonK

Oral supplementation (50150 g daily) may suit dietary deficiency without nerve involvement, but malabsorption cases require injections

Again, the copper uglies are rare, but its something to be cautious about

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Hypervitaminosis B12 can indicate an underlying condition rather than excessive supplementation, but its important to monitor levels with a healthcare professional