can you buy vitamin b12 injections over the counter for Injection Cyanocobalamin 1,000 mcg, 25/Box (Rx) — Mountainside Medical Vitamin B12 Injections (Cyanocobalamin Injections)

With B12 injections, you also have to be careful not to inject them into a vein

Someone with mild symptoms and a gut condition may still need injections, while someone with lower numbers and healthy digestion may respond well to oral B12

Oral supplements have not worked for you, which is common when an absorption problem is the underlying cause

For more details on homocysteine, see the article: Homocysteine and Vitamin B12 The Steps of the Methionine Cycle Step 1: methionine is converted into SAM by the enzyme methioninadenosyltransferase (MAT) in the presence of magnesium (Mg) and ATP (universal energy donor)

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