should b12 injections be given im or subq How to self-inject intramuscular vitamin - Overview What happens if you inject

This means serum B12 can appear adequate while your cells are functionally starved

Preliminary data suggest B12 supplementation may help reduce pain and improve quality of life in patients with aromatase inhibitor-associated musculoskeletal symptoms (62)

Fortified food options include: Supplement forms vary in bioavailability, with methylcobalamin and cyanocobalamin representing the most commonly used and well-studied forms

The complementary mechanisms also mean that side effects are generally not additive, though gastrointestinal symptoms may occur with both medications and require careful management during the initiation phase

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So, when your B12 is low, its no wonder you feel drained