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When B12 is deficient, this process can slow, potentially affecting the hair growth cycle
For mild deficiencies, you may need 2-3 injections over several weeks to notice the impact
B12 is a water-soluble vitamin, meaning any excess is quickly flushed out through the urine
If your result is below 300 and you have symptoms, it is worth discussing further testing with your doctor rather than assuming the reference range covers you completely
A Vitamin B12 injection is an intramuscular or subcutaneous administration of cobalamin a water-soluble vitamin essential for neurological function, red blood cell synthesis, DNA replication, and energy metabolism
The supplements are that much more effective when they hit your bloodstream directly, so you need less
