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The one constant is consistency of timing and route for a mechanism that works by gradually shifting cellular metabolism, day-to-day steadiness matters more than any single dose
Intramuscular (IM) : Common sites include the upper arm (deltoid muscle), thigh (vastus lateralis), or buttocks (gluteus medius)
"For those who have a severe deficiency, injections can quickly raise the level." Vitamin B12 injections are often self-administered Shanna Levine, a primary care physician and instructor of medicine at the Mount Sinai Health System, believes injections are the best way to get B12 if you have a deficiency
More severe side effects include: Advertisement It can be difficult to diagnose vitamin B12 deficiency because you may not have symptoms, or symptoms can be like other nutritional deficiencies
Researchers must adhere to all local regulations and guidelines for safe and proper usage
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