inject b12 yourself Treating Severe Vitamin Deficiency How to Self-Inject Vitamin B12

Gastrointestinal symptoms (more common with oral preparations): Mild nausea or upset stomach Diarrhoea (typically with very high doses) Other effects: Headache, particularly when treatment is first initiated Dizziness or light-headedness Skin reactions such as mild rash or itching Temporary reddish discolouration of urine (chromaturia) after hydroxocobalamin injections, which is harmless It is important to note that many symptoms attributed to B12 supplementation may actually represent the body's response to correcting a deficiency

Intramuscular injection can cause local pain, deep (gluteal) injection is necessary

But it isn't the only option

A higher gauge needle refers to a smaller outside diameter of the needle tubing

skin leakage was equivalent and pain scores were improved with the 4-mm needle

In those with pernicious anemia, the body is unable to absorb vitamin B12 in the intestines and produce enough normal red blood cells