injection b12 site Vitamin Sites: All You Need to Know B12 Injection Dosage and Frequency:

A lowish but witin-range result after treatment would indicate that you do have a severe B12 deficiency

Your lab results tell a story

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Having the shot directly in to the muscle allows the liquid vitamin to enter the blood stream quickly, bypassing the digestive system and the gastric acids and many other obstacles anything which is taken via the mouth has to go through to reach the small intestine, for re absorption

At the same time, glycine is also an obligatory co-agonist at N-methyl-D-aspartate (NMDA) receptors, a type of excitatory glutamate receptor in the brain

They may have underreported minor discomforts that did not meet thresholds for adverse event classification