do vitamin b12 injections give you energy Injections: What Need To Know Looking for a boost from

Your body needs it to produce red blood cells and DNA and to keep your brain and nerve cells functioning

If the cause is absorption failure (pernicious anemia, gastric surgery), intramuscular B12 injections bypass the gut

Certain groups, including vegetarians, vegans, and older adults, are at higher risk for B12 deficiency and should consider supplements or fortified foods

Mild nausea or a temporary drop in blood pressure

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